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The Relationship between Mental Health Literacy and Subjective Well-Being of Young and Middle-Aged Residents: Perceived the Mediating Role of Social Support and Its Urban-Rural Differences 被引量:1
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作者 Zhen Zhang Suyan Chen +4 位作者 Xiaoxuan Wang Jun Liu Yilin Zhang Yongxia Mei Zhenxiang Zhang 《International Journal of Mental Health Promotion》 2023年第4期471-483,共13页
This study investigates mental health literacy among young and middle-aged urban and rural residents and the differences in mental health literacy,perceived social support and subjective well-being.From January to Feb... This study investigates mental health literacy among young and middle-aged urban and rural residents and the differences in mental health literacy,perceived social support and subjective well-being.From January to February 2022,620 participants(320 rural and 300 urban residents)from three provinces of China were selected by con-venience sampling.A general data questionnaire,mental health literacy scale,perceived social support scale and subjective well-being scale were administered.The mental health literacy scores of urban residents were 3.34±0.57 and those of rural residents were 2.73±0.79.The results of multiple regression analysis showed that the mental health literacy scores of rural residents were more significant than those of urban residents in terms of sex and age,while urban residents’mental health literacy scores were more significant than those of rural resi-dents in terms of monthly income.Mental health literacy,perceived social support and subjective well-being of young and middle-aged urban and rural residents were all positively correlated(P<0.01).While the level of mental health literacy is better among urban residents than rural residents,perceived social support plays a partial mediating role between mental health literacy and subjective well-being of both urban and rural residents,and should be the focus of researchers seeking to improve the level of well-being of residents. 展开更多
关键词 young and middle-aged people mental health literacy perceived social support subjective well-being mediating role
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Effect of Age and Sex on Stroke Mortality of Young and Middle-aged Adults in China,2002–2019,and Predictions to 2030
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作者 ZHAI Yi SI Xiang +1 位作者 WANG Wen Zhi ZHAO Wen Hua 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2023年第4期305-312,共8页
Objective This study aimed to examine the trends in stroke mortality among young and middle-aged adults in China.Methods Data were obtained from the China national vital registration system.Significant changes in mort... Objective This study aimed to examine the trends in stroke mortality among young and middle-aged adults in China.Methods Data were obtained from the China national vital registration system.Significant changes in mortality were assessed by Joinpoint regression.Age-period-cohort analysis was used to explain the reasons for the changes.Future mortality and counts were predicted by the Bayesian age-period-cohort model.Results Between 2002 and 2019,a total of 6,253,951 stroke mortality in young and middle-aged adults were recorded.The age-adjusted mortality rates(AAMRs)of women showed a downward trend.The annual percent changes(APC)were-3.5%(-5.2%,-1.7%)for urban women and-2.8%(-3.7%,-1.9%)for rural women.By contrast,the AAMRs per 100,000 for rural men aged 25–44 years continued to rise from 9.40 to 15.46.The AAMRS for urban men aged 25–44 years and urban and rural men aged 45–64years did not change significantly.Between 2020 and 2030,the projected stroke deaths are 1,423,584 in men and 401,712 in women.Conclusion Significant sex and age disparities in the trends of stroke mortality among young and middle-aged adults were identified in China.Targeted health policy measures are needed to address the burden of stroke in the young generation,especially for rural men,with a focus on the prevention and management of high risk factors. 展开更多
关键词 STROKE MORTALITY young and middle-aged Joinpoint regression Age-period-cohort analysis
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Influencing factors of fatigue in young and middle-aged patients with coronary heart disease:a cross-sectional study
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作者 Lu Yu Yao-Yao Hu +3 位作者 Jing Zhang Fang-Ying Mao Qing Wu Lin Liu 《Life Research》 2023年第2期20-29,共10页
Objective:To examine the present state of fatigue in young and middle-aged patients with coronary heart disease(CHD)and to identify the elements that may be affecting it.Methods:From December 2020 to June 2021,240 you... Objective:To examine the present state of fatigue in young and middle-aged patients with coronary heart disease(CHD)and to identify the elements that may be affecting it.Methods:From December 2020 to June 2021,240 young and middle-aged patients with CHD who were being treated in the cardiology department of a tertiary care hospital in Suzhou were chosen using a convenience sampling method in order to gather data on the patients’sociodemographic status,fatigue,social support,and stress.Results:Of the 240 disseminated questionnaires,220 valid responses were returned,resulting in an effective recovery rate of 91.67%.The frequency of exhaustion was 51.8%,and the fatigue score was(5.27±2.77).The stress score was(11.15±3.36),while the overall social support score was(39.13±4.72).Binary logistic regression analysis indicated that age,exercise,staying up late,stress,social support,high-sensitivity troponin T,high-density lipoprotein,and ejection fraction were independent risk factors for fatigue in young and middle-aged patients with CHD(P<0.05).Conclusions:Fatigue is more prevalent in young and middle-aged patients with CHD.Clinical nurses can create a unique management plan for patients based on their lifestyle and behavioral patterns,stress levels,social support,and clinical signs to reduce fatigue. 展开更多
关键词 young and middle-aged adults coronary heart disease FATIGUE influencing factors symptom experience model
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Association of fatigue with short-term prognosis in young and middle-aged patients with coronary heart disease
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作者 Fang-Ying Mao Lu Yu +1 位作者 Qing Wu Jing Zhang 《Psychosomatic Medicine Research》 2023年第2期1-8,共8页
Background:To investigate the effect of fatigue on the short-term prognosis of young and middle-aged patients with coronary heart disease(CHD).Methods:A cross-sectional,observational survey was distributed at a tertia... Background:To investigate the effect of fatigue on the short-term prognosis of young and middle-aged patients with coronary heart disease(CHD).Methods:A cross-sectional,observational survey was distributed at a tertiary hospital in Suzhou,China.Patients were assessed for fatigue and their prognosis was assessed at 3 and 6 months after discharge.General Information Questionnaire,Fatigue Scale and Seattle Angina Questionnaire(SAQ)were used for the survey.The Cox proportional hazard model was used to analyze the impact of fatigue on the occurrence of major adverse cardiac events(MACEs)at 3 and 6 months after discharge.Multiple linear regression models were used to analyze the effect of fatigue on health-related quality of life(HRQoL)at 3 and 6 months after discharge.Results:199 patients were followed up with in the end.43 patients(21.6%)with MACE three months after discharge had a total SAQ score of(399.76±39.61).The overall SAQ score was(425.14±22.66)and 52 patients(26.1%)experienced MACE six months after discharge.Fatigue was identified as a risk factor for MACE 6 months after discharge by the Cox proportional hazard model(HR=2.939,95%CI:0.177~0.655,P=0.001)and as an independent risk factor for quality of life 3 and 6 months after discharge by multiple linear regression(P<0.001).Conclusions:In individuals who are young or middle-aged and have coronary heart disease,fatigue is a risk factor for the short-term prognosis.It is advised that clinical professionals prioritize patient fatigue assessment and improve management of fatigue symptoms. 展开更多
关键词 coronary heart disease FATIGUE major adverse cardiovascular events quality of life young and middle-aged
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Factors associated with financial support in old age for young and middle-aged rural residents in China
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作者 Suyan Shen Fang Li John Kipkorir Tanui 《Chinese Journal of Population,Resources and Environment》 2015年第2期169-176,共8页
This study examined the factors associated with financial support in old age from three primary mechanisms-personal savings,family support,and social insurance-to explore the implications for the future development of... This study examined the factors associated with financial support in old age from three primary mechanisms-personal savings,family support,and social insurance-to explore the implications for the future development of China's rural social welfare system.Cross-sectional surveys of 1392 young and middle-aged rural residents were conducted in July and August2012.The results showed that while social insurance was increasingly acceptable,personal savings and family support still had fundamental value.Combining the three mechanisms,the rural old-age welfare system presented nontraditional features.China's new rural endowment insurance is discussed as a means to address the need for financial support among the rural aging population. 展开更多
关键词 OLD-AGE financial SUPPORT young and middle-aged rural RESIDENTS personal SAVINGS family SUPPORT social INSURANCE
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Psychosocial Adaptation Level and Work Participation Rate of Young and Middle-aged Patients with Coronary Heart Disease after PCI
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作者 Hongyun ZHENG Yan ZHAN Li ZHANG 《Medicinal Plant》 CAS 2022年第3期68-70,74,共4页
[Objectives]The research aimed to understand the psychosocial adjustment to illness of young and middle-aged patients with coronary heart disease after PCI and their participation situation in work.[Methods]210 young ... [Objectives]The research aimed to understand the psychosocial adjustment to illness of young and middle-aged patients with coronary heart disease after PCI and their participation situation in work.[Methods]210 young and middle-aged patients aged 18-59 years with coronary heart disease treated by PCI in a tertiary hospital of Suzhou from July of 2020 to November of 2022 were selected,and general information of patients in three days after operation was registered.Self-report psychosocial adjustment to illness scale(PAIS-SR)was used to investigate the psychosocial adjustment to illness of patients in 1,3 and 6 months after operation and the participation rate of work.[Results]The psychosocial adjustment to illness of young and middle-aged patients with coronary heart disease after PCI was different in gender,age,education level,marital status,hypertension,diabetes,postoperative cardiac color Doppler ultrasound results(left ventricular ejection fraction)and the number of stents(P<0.05).[Conclusions]The psychosocial adjustment to illness of young and middle-aged patients with coronary heart disease after PCI needs to be improved.The psychosocial adjustment to illness of men is higher than that of women.The older the age is,the lower the psychosocial adjustment to illness is.The psychosocial adjustment to illness of patients with high educational background is higher than those with low educational background,while the psychosocial adjustment to illness of married people is higher than unmarried people.The psychosocial adjustment to illness of patients with hypertension and/or diabetes is lower. 展开更多
关键词 young and middle-aged Coronary heart disease PCI PSYCHOLOGY
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Correlation of blood uric acid level with the degree of anxiety as well as the neurotransmitter and cytokine secretion in young and middle-aged patients with anxiety disorder
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作者 Xiao-Bei Liu Xiao-Jun Hou 《Journal of Hainan Medical University》 2019年第2期62-65,共4页
Objective:To study the correlation of blood uric acid level with the degree of anxiety as well as the neurotransmitter and cytokine secretion in young and middle-aged patients with anxiety disorder.Methods: The young ... Objective:To study the correlation of blood uric acid level with the degree of anxiety as well as the neurotransmitter and cytokine secretion in young and middle-aged patients with anxiety disorder.Methods: The young and middle-aged patients diagnosed with generalized anxiety disorder in our hospital between March 2015 and February 2018 were selected as the anxiety group, and the healthy subjects receiving physical examination during the same period were selected as the control group. Peripheral blood was collected to determine the contents of uric acid, neurotransmitters and cytokines, and Hamilton Anxiety Scale (HAMA) was adopted to judge the degree of anxiety.Results: The blood uric acid level of anxiety group was obviously higher than that of control group and the higher the HAMA scores, the more significant the rising of blood uric acid levels;serum 5-hydroxytryptamine (5-HT), norepinephrine (NE), dopamine (DA), interleukin-1α (IL-1α), IL-17 and interferon-γ (IFN-γ) contents of anxiety group were significantly higher than those of control group whereas neuropeptide Y (NPY), IL-4 and transforming growth factor-β (TGF-β) contents were significantly lower than those of control group;blood uric acid level of the anxiety group was positively correlated with 5-HT, NE, DA, IL-1 , IL-17 and IFN-γ contents, and negatively correlated with NPY, IL-4 and TGF-β contents.Conclusion: The rise of blood uric acid level in young and middle-aged patients with anxiety disorder is related to the aggravation of anxiety degree as well as the abnormal secretion of neurotransmitters and cytokines. 展开更多
关键词 ANXIETY disorder in the young and middle-aged BLOOD uric acid NEUROTRANSMITTER CYTOKINE
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Experience of Treating Hypertension from Liver and Spleen Among Middle-Aged and Young Patients:A Summary
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作者 Caiying Li 《Journal of Clinical and Nursing Research》 2022年第2期25-29,共5页
Qi deficiency of the spleen and stomach,transportation,phlegm and dampness generate endogenous and turbid phlegm that violates the position of yang clearance.As a result,dizziness cis resulted.The author believes that... Qi deficiency of the spleen and stomach,transportation,phlegm and dampness generate endogenous and turbid phlegm that violates the position of yang clearance.As a result,dizziness cis resulted.The author believes that the incidence of middle-aged and young patients with hypertension is mostly related to the dysfunction of liver and spleen.Liver depression and qi stagnation is the beginning of the onset;spleen deficiency and dyskinesia is the norm of the onset;and liver and spleen imbalance is the origin of the onset.It is advocated that regulating the liver and spleen to restore the rise and fall,harmonizing qi and blood and preventing lesions are the main treatment methods for the treatment of middle-aged and young people’s hypertension,which is conducive to the development of more clinical diagnosis and treatment ideas for hypertension amomg middle-aged and young people. 展开更多
关键词 HYPERTENSION young and middle-aged Liver and spleen Clinical experience
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Correlation between psychological traits and the use of smart medical services in young and middle-aged adults: An observational study
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作者 Hu Zhang Yan Liu Rui Gu 《World Journal of Psychiatry》 SCIE 2024年第8期1224-1232,共9页
BACKGROUND Psychological problems affect economic development.However,there is a huge gap between mental health service resources and mental health service needs.Existing mental health service technology and platforms... BACKGROUND Psychological problems affect economic development.However,there is a huge gap between mental health service resources and mental health service needs.Existing mental health service technology and platforms cannot meet all the diverse mental health needs of people.Smart medicine is a new medical system based online that can effectively improve the quality and efficiency of medical services and make mental health services accessible.AIM To explore the level of intelligent medical use among young and middle-aged people and its correlation with psychological factors.METHODS Convenience sampling was used to select 200 young and middle-aged patients with medical experience at the Third People's Hospital of Chengdu between January 2022 and January 2023 as the research subjects.The general condition Questionnaire,Eysenck Personality Questionnaire,Symptom Checklist-90,General Health Questionnaire,and Smart Medical Service Use Intention Questionnaire were used to collect data.Pearson’s correlation was used to analyze the correlation between the participants’willingness to use smart medical services and their personality characteristics,psychological symptoms,and mental health.RESULTS The results revealed that the mental health of young and middle-aged people was poor,and some had psycho-logical problems such as anxiety,depression,and physical discomfort.Familiarity,acceptance,and usage of smart healthcare in this population are at a medium level,and these levels correlate with psychological characteristics.Acceptance was positively correlated with E,and negatively correlated with P,anxiety,fear,anxiety/insomnia,and social dysfunction.The degree of use was negatively correlated with P,obsessive-compulsive symptoms,depression,anxiety,hostility,paranoia,and somatic symptoms.CONCLUSION The familiarity,acceptance,and usage of smart medical services among the middle-aged and young groups are related to various psychological characteristics. 展开更多
关键词 young and middle-aged people Smart healthcare Willingness to serve Psychological characteristics Questionnaire survey Relevance
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Growth Responses of Young Slash Pine (Pinus elliottii Engelm.) to N, P and K Fertilizers in Red-Yellow Soil in Jiangxi Province, China 被引量:2
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作者 CHENHONGJUN HUSHICAI 《Pedosphere》 SCIE CAS CSCD 1997年第3期243-249,共7页
During 1991-1995,the growth responses of young slash pine to N,P and K fertilizers and rational rate and ration of fertilizer in yellow-red soil at Fengshushan Forest Farm Jiangxi Province were studied.N fertilizer de... During 1991-1995,the growth responses of young slash pine to N,P and K fertilizers and rational rate and ration of fertilizer in yellow-red soil at Fengshushan Forest Farm Jiangxi Province were studied.N fertilizer decreased the growth of slash pine,while P no only significanlty improved the increment of bottom diameter,height and crown diameter,but also caused earlier canopy closure of the stand.It also had a sustainable effect in the next two years.Slash pine had the most significant response to the treatment of 200 kg P2O5 ha^-1 ,in which tree height,bottom diameter and crown diameter(EW and SN) were increased by 22%,35%,20% and 18% i 1994,21%,25%,10% and 10% in 1995,respectively,compared to the control.Although there was no remarkable response to K fertilizer,good growth response to the application of 100 kg P2O5 plus 100 kg K2O ha^-1 existed and tree hieght ,bottom diameter and rown diameter(EW and SN ) were increased by 31%,14%,23% and 21%,respectively,in 1993 ,compared to the control. 展开更多
关键词 肥料 江西 松树 湿地松
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不同森林经营模式下亚热带森林土壤有机碳损失差异 被引量:2
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作者 裴蕴 元晓春 +3 位作者 魏智华 杨智杰 胥超 陈仕东 《亚热带资源与环境学报》 2023年第2期33-40,共8页
由于幼林生态系统的典型脆弱性,其土壤有机碳在经营管理过程中很容易损失,从而削弱了中国林业碳汇在实现碳中和目标中的作用。全面量化不同经营模式下幼林地土壤碳在各个途径中的损失对于甄选高碳汇森林经营模式和精准提升幼林地固碳能... 由于幼林生态系统的典型脆弱性,其土壤有机碳在经营管理过程中很容易损失,从而削弱了中国林业碳汇在实现碳中和目标中的作用。全面量化不同经营模式下幼林地土壤碳在各个途径中的损失对于甄选高碳汇森林经营模式和精准提升幼林地固碳能力至关重要,然而相关研究十分缺乏。本研究选择由常绿阔叶次生林(次生林)及由其转换而来的米槠人工幼林、杉木人工幼林以及人工促进天然更新(人促更新)幼林为研究对象。比较各林地土壤有机碳在水土流失和异养呼吸中损失的量,并对比不同土层淋溶液中可溶性有机碳(DOC)浓度。结果发现人促更新幼林土壤通过径流和泥沙损失的碳量低至接近次生林的水平,仅分别为米槠和杉木人工幼林的18.6%和53.9%。米槠和杉木人工林通过径流和泥沙损失的碳量随降雨增加而显著增加,而次生林通过径流损失的碳量不受降雨影响。人促更新幼林和次生林土壤异养呼吸损失的碳量比米槠和杉木人工幼林高出26.2%~36.7%。次生林15 cm、30 cm和60 cm的土壤淋溶液DOC浓度均较低,而人促更新幼林和杉木人工幼林较高。观测期间,人促更新幼林土壤通过因水土流失和异养呼吸两个途径造成的总碳损失量与次生林相当,但是显著低于米槠和杉木人工幼林,仅分别为二者的26.2%和67.4%。本研究率先提出了人促更新经营土壤保碳能力强的证据,因而中国在实现碳中和目标的巨大压力下宜大力推广人促更新经营。传统人工林经营过程中水土流失是造成幼林阶段土壤碳损失的主要原因,制定合理的水土保持措施有助于精准提升中国人工幼林地固碳能力。 展开更多
关键词 森林经营 碳汇 人促更新 人工幼林 土壤碳损失
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中亚热带人工幼林土壤甲烷通量月动态及影响因素 被引量:1
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作者 崔莹莹 何露露 +4 位作者 肖好燕 邹秉章 王思荣 万晓华 黄志群 《亚热带资源与环境学报》 2023年第2期41-49,共9页
亚热带森林土壤是重要的大气甲烷(CH_(4))汇。本研究以中亚热带人工幼林为研究对象,采用静态箱-气相色谱法对土壤CH_(4)通量进行为期1年的野外原位观测,并探究其与环境因子、土壤理化性质及土壤微生物的关系。结果表明:研究区内人工幼... 亚热带森林土壤是重要的大气甲烷(CH_(4))汇。本研究以中亚热带人工幼林为研究对象,采用静态箱-气相色谱法对土壤CH_(4)通量进行为期1年的野外原位观测,并探究其与环境因子、土壤理化性质及土壤微生物的关系。结果表明:研究区内人工幼林土壤为甲烷汇,土壤CH_(4)月均吸收通量变化范围为10~75.6μg·m^(-2)·h^(-1)。土壤CH_(4)吸收通量呈显著的月动态,最高值出现在3月,最低值是5月。土壤含水率、林内气温和空气湿度是控制甲烷吸收的重要环境因子,能解释土壤CH_(4)月吸收通量变化的36.4%,土壤CH_(4)月吸收通量与土壤含水率呈负相关关系,与林内气温和空气湿度呈正相关关系。土壤pH值、土壤可溶性有机氮、铵态氮与土壤CH_(4)吸收通量为显著的正相关,能解释其变异的23%;土壤CH_(4)吸收通量与甲烷氧化菌(18∶1ω7c)浓度无显著的相关性。此外,土壤微生物生物量氮是影响甲烷氧化菌(18∶1ω7c)的主要因子。研究结果证实了亚热带人工幼林具有重要的土壤甲烷吸收作用,土壤CH_(4)吸收通量主要受环境因子和土壤理化的影响(约占60%)。本研究对中亚热带森林土壤甲烷汇的估算具有重要意义,也为森林碳循环和固碳潜力的发展提供理论支持。 展开更多
关键词 土壤CH 4通量 温室气体 人工幼林 甲烷氧化菌
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红松人工幼龄林改建红松经济林技术措施 被引量:1
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作者 李明泉 于晓野 +2 位作者 王聪慧 李秀红 李福强 《吉林林业科技》 2023年第4期35-38,共4页
本文依据多年调查研究成果并结合吉林省红松人工林现状,提出红松人工幼龄林改建经济林的技术措施,为促进红松经济林健康、快速发展提供科学依据。
关键词 红松人工幼龄林 改建 经济林 技术
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施肥和透光抚育对红皮云杉幼龄人工林林木生长的影响 被引量:1
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作者 张昊 邢鸿林 +2 位作者 唐国儒 袁天贺 杨玲 《森林工程》 北大核心 2023年第3期21-29,共9页
为解决云杉(Picea)属树种早期生长缓慢影响大径材用材林的培育周期,可通过合理施肥和抚育措施结合处理,促进树高生长和地径增加。以落叶松林下红皮云杉(Picea koraiensis)10年生人工幼龄林木为研究对象,随机设置12块10 m×10 m的固... 为解决云杉(Picea)属树种早期生长缓慢影响大径材用材林的培育周期,可通过合理施肥和抚育措施结合处理,促进树高生长和地径增加。以落叶松林下红皮云杉(Picea koraiensis)10年生人工幼龄林木为研究对象,随机设置12块10 m×10 m的固定样地,肥料类型选择氮(N-尿素)、氮磷(NP-尿素+过磷酸钙)、氮磷钾(NPK-尿素+过磷酸钙+磷酸钾)。设置2种施肥时间,1)生长季前中后期施肥。每年在生长季初(5月中旬)、中(7月中旬)、后期(8月中旬)施肥3次,连续重复施肥4 a;2)生长季前中末期施肥。每年在生长季初(5月中旬)、中(7月中旬)、末期(9月中旬)施肥3次,连续重复施肥4 a。透光抚育设置,施肥一个生长季后对上层落叶松林木进行生长伐,抚育后林分郁闭度为0.6。通过研究施肥和透光抚育对林木生长的影响,旨在开发促进红皮云杉幼树生长的施肥管理技术,以缩短幼龄林生长周期。施NPK肥促进红皮云杉幼树树高和地径生长的效果好于只施单一肥料或氮磷2种肥料的混合肥。生长季前中末期施加NPK肥处理的树高、地径年生长量比生长季前中后期施加NPK肥的处理分别高41.11%和49.81%。透光抚育后不同年份之间林木的树高年生长量差异不显著,地径年生长量差异显著,3个生长季后树高和地径的年生长量与抚育前相比差异不显著。生长季前中后期施肥结合透光抚育处理2个生长季后树高和地径的年生长量与对照差异显著,3个生长季后只有地径的年生长量与对照差异显著。生长季前中末期施氮磷钾肥处理(NPK2)结合透光抚育处理3个生长季后,地径年生长量分别高出对照和生长季前中后期施氮磷钾肥(NPK1)结合透光抚育的处理153.16%和10.31%。施肥与透光抚育结合处理可以提高红皮云杉地径的年生长量,在连续施肥4 a时达到显著水平,生长季前中末期施肥效果好于前中后期施肥。研究结果为解决林下造林红皮云杉人工林木幼龄期生长缓慢、缩短红皮云杉大径材用材林培育周期奠定了基础。 展开更多
关键词 红皮云杉 施肥 透光抚育 幼龄人工林 林木生长
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不同配方施肥对杉木人工林幼林生态化学计量特征的影响
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作者 赵铭 何功秀 +4 位作者 文仕知 及利 张盈 倪艳林 李智华 《中南林业科技大学学报》 CAS CSCD 北大核心 2023年第8期138-148,共11页
【目的】生态化学计量法是探索耦合元素平衡和循环的有效工具(如氮、碳、和磷等),研究不同配方施肥对湖南会同杉木人工幼林C、N、P化学计量特征的影响,为杉木人工林生态系统经营与管理提供科学依据。【方法】以“3414”配方施肥为基准,... 【目的】生态化学计量法是探索耦合元素平衡和循环的有效工具(如氮、碳、和磷等),研究不同配方施肥对湖南会同杉木人工幼林C、N、P化学计量特征的影响,为杉木人工林生态系统经营与管理提供科学依据。【方法】以“3414”配方施肥为基准,在湖南省会同县生态站林场2年生杉木人工林内设置14个不同配方施肥处理,分别在施肥前、施肥12个月后采集0~10 cm表层土壤样品及杉木根、枝、叶样品,采用电位法测定土壤pH值,重铬酸钾加热法测定土壤、植物的有机碳含量,凯氏消煮法测定土壤、植物的全氮含量,钼锑抗比色法(HClO4—H2SO4)测定土壤、植物的全磷含量,运用单因素方差分析法和Pearson相关分析法分析杉木人工林幼林生态化学计量比的差异及其相关性。【结果】1)施肥明显改变土壤化学计量特征。与CK相比,不同配方施肥处理土壤C含量无显著变化,土壤N、P含量有不同程度的变化,在处理J(N3P2K2)和处理E(N2P2K2)分别观测到土壤N、P含量的最大值。2)配方施肥显著改变杉木幼龄林根、枝、叶化学计量特征。3)配方施肥后,土壤N∶P低于全国平均水平(9.3),说明影响试验地土壤生产力的主要限制因子是N;叶片、枝干N∶P变化区间分别为12.15~13.89、8.73~10.07,说明叶片、枝干生长也主要受N的影响。4)土壤C、N、P计量值对杉木人工林幼林的计量值具有一定影响,但对叶的影响相对较弱。5)处理J(N3P2K2)施肥效果最为显著,表层土壤及叶片的N含量分别比CK提高28.36%和5.58%,枝的N、P含量分别比CK提高11.00%和28.13%,根的N、P含量分别比CK提高53.86%和4.92%。【结论】适宜的配方施肥能显著改善土壤质量,提高林木对肥料的利用效率。基于“3414”试验,可知土壤,叶片,枝干和根系全氮均高于CK,氮是限制该试验地杉木人工林幼林林木生长及土壤生产力的因子之一。每株杉木幼树施用150 g氮肥、100 g磷肥、100 g钾肥的配方施肥模式(处理J)效果最为显著。 展开更多
关键词 配方施肥 生态化学计量 杉木人工林幼林 推荐施肥 土壤理化性质 林木器官 3414试验
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Sun Fengyan, a model for young and middle-aged professionals
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作者 ZHANG SHENFEN 《Women of China》 1999年第9期4-5,共2页
APOPLEXY is generally acknowledgedin medical circles as a forceful killer.It resultsin ischemic damage of the nerve cells(a lackof blood supply).some of which die andothers of which survive.Can we stop thedeath ot the... APOPLEXY is generally acknowledgedin medical circles as a forceful killer.It resultsin ischemic damage of the nerve cells(a lackof blood supply).some of which die andothers of which survive.Can we stop thedeath ot these cells by medical means,or atleast raise the survival rate and rehabilitatethem?That is what Professor Sun Fengyanwith the Shanghai Medical SciencesUniversity is working on. Sun Fengyan was conferred a Doctor ofnerve pharmacologia in 1987 and three 展开更多
关键词 Sun Fengyan a model for young and middle-aged professionals
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亚热带丘陵茶园间作白三叶草的生态效应 被引量:86
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作者 宋同清 王克林 +4 位作者 彭晚霞 王久荣 肖润林 曾馥平 汤宇 《生态学报》 CAS CSCD 北大核心 2006年第11期3647-3655,共9页
在亚热带丘陵区1a生幼龄茶园通过连续4a的大田对比试验,研究了茶园间作白三叶草的生态效应,结果发现:茶园间作白三叶草降低了土壤容重,提高了土壤孔隙度、有机质、全N、水解N的含量、K的活性、蚯蚓的数量和生物量,消耗了部分有效P... 在亚热带丘陵区1a生幼龄茶园通过连续4a的大田对比试验,研究了茶园间作白三叶草的生态效应,结果发现:茶园间作白三叶草降低了土壤容重,提高了土壤孔隙度、有机质、全N、水解N的含量、K的活性、蚯蚓的数量和生物量,消耗了部分有效P;增加了土壤关键层次(0—20cm)和关键时期(4~6月)的水分含量,延缓和缩短了夏季高温干旱与秋季持续干旱时间;获得了土壤降温时增温、保温与升温时降温的双向动态调控效果,增加了同一层次土壤温度的稳定性,延缓了高温和低温的出现时间,缩短了过度高温时间,减少了高温对茶树生长产生的影响;抑制了杂草生长,增加了天敌的种类和种群数量,减少了虫害发生率。从而形成了立地环境.茶树.伴生生物群落系统自我调节的动态平衡,促进了茶树生长,改善了茶叶品质,显著增加了茶叶产量。与清耕茶园相比,茶园间作白三叶草后,春秋茶的酚氨比分别下降了17.10%和30.90%,产量提高了32.65%。 展开更多
关键词 幼龄茶园 间作白三叶草 生态效应
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油茶高产栽培系列技术研究——配方施肥试验 被引量:99
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作者 陈永忠 彭邵锋 +3 位作者 王湘南 杨小胡 贺军辉 王德斌 《林业科学研究》 CSCD 北大核心 2007年第5期650-655,共6页
以油茶优良无性系成林和幼林为材料,通过随机区组和正交试验,结果表明配方施肥对油茶优良无性系成林和幼林产果量增加均有不同程度的促进作用。油茶成林对产果量最大的影响因子是施肥总量,其次是微量元素肥、施肥频率和施肥配比;较合理... 以油茶优良无性系成林和幼林为材料,通过随机区组和正交试验,结果表明配方施肥对油茶优良无性系成林和幼林产果量增加均有不同程度的促进作用。油茶成林对产果量最大的影响因子是施肥总量,其次是微量元素肥、施肥频率和施肥配比;较合理的施肥配比组合应为:施肥总量(200 kg.hm-2)+微量元素肥(Zn 10 g.株-1)+施肥频率(连续3年施肥)+施肥配比(5∶1∶5),增产幅度可达58.69%。油茶成林鲜果出籽率最大影响因子是微量元素肥、其次是施肥总量,施肥配比和施肥频率;而每500 g鲜果数最大影响因子是施肥配比、其次是微量元素肥、施肥频率和施肥总量等因子;油茶优良无性系新造幼林施肥也能明显提高油茶单株产果量,其中以间年施肥、每年施肥量为N∶P2O5∶K2O为2∶1∶2;平均单株产果量达1.16 kg,比对照增产136.4%。增施磷肥能明显促进油茶幼林早期挂果。配方施肥对油茶幼林鲜果出籽率没有明显的影响。 展开更多
关键词 油茶 优良无性系 高产栽培 配方施肥 正交试验 成林 幼林
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幼龄胶园间种土壤肥力及土壤酶活性特征研究 被引量:27
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作者 吴志祥 谢贵水 +3 位作者 杨川 周兆德 陈俊明 赖华英 《南方农业学报》 CAS CSCD 2011年第1期58-64,共7页
【目的】对幼龄胶园间种香蕉、葛藤对胶园土壤肥力和土壤酶活性的影响进行研究,为科学管理胶园土壤、充分利用林下资源提供依据。【方法】选择2006年7~8月栽植的两个相邻橡胶林段,2008年4月分别在其胶行中间种香蕉、葛藤,同时设无... 【目的】对幼龄胶园间种香蕉、葛藤对胶园土壤肥力和土壤酶活性的影响进行研究,为科学管理胶园土壤、充分利用林下资源提供依据。【方法】选择2006年7~8月栽植的两个相邻橡胶林段,2008年4月分别在其胶行中间种香蕉、葛藤,同时设无间种作对照。2008年7月~2010年1月分7次采集胶园土壤样品进行土壤养分含量和土壤酶活性分析。【结果】幼龄胶园问种香蕉和葛藤均可提高胶园土壤有机质、全氮、速效磷和速效钾含量,但以间种香蕉的效应最明显;幼龄胶园问种可提高胶园土壤脲酶、磷酸酶活性,其活性大小依次为间种葛藤〉间种香蕉〉无间种;幼龄胶园间种可提高胶园土壤纤维素酶、蔗糖酶酶活性,其活性大小依次为间种香蕉〉间种葛藤〉无间种。幼龄胶园间种葛藤可提高胶园土壤过氧化氢酶和多酚氧化酶活性,但间种香蕉则降低这两种酶活性。【结论】幼龄胶园间种可提高土壤肥力,改善胶园微环境。有条件的地区,应大力发展幼龄胶园问种农作物或其他经济作物,以增加胶农非胶收入。 展开更多
关键词 幼龄胶园 间种 土壤肥力 土壤酶活性
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幼龄胶园间种对土壤微生物作用的影响 被引量:15
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作者 吴志祥 谢贵水 +3 位作者 杨川 陈帮乾 陈俊明 赖华英 《南方农业学报》 CAS CSCD 北大核心 2012年第9期1325-1329,共5页
【目的】对幼龄胶园间种香蕉、葛藤后胶园土壤微生物生物量与微生物作用进行对比研究,为充分利用幼龄胶园林下资源、科学管理胶园土壤提供参考。【方法】选择海南省儋州市橡胶主栽区两个相邻的幼龄橡胶林段,分别在其胶行中间种香蕉、葛... 【目的】对幼龄胶园间种香蕉、葛藤后胶园土壤微生物生物量与微生物作用进行对比研究,为充分利用幼龄胶园林下资源、科学管理胶园土壤提供参考。【方法】选择海南省儋州市橡胶主栽区两个相邻的幼龄橡胶林段,分别在其胶行中间种香蕉、葛藤,同时设无间种作对照。按季共分7次采集胶园土壤样品,对其土壤微生物生物量和微生物作用进行检测分析。【结果】相比无间种处理,幼龄胶园间种处理均能明显提高土壤微生物生物量、促进土壤硝化作用,间种葛藤能促进土壤微生物呼吸作用,间种香蕉促进土壤微生物氨化作用最明显,其他微生物作用各处理间差异不明显。【结论】幼龄胶园间种能改善胶园土壤微环境,可大力发展幼龄胶园间种农作物或其他经济作物。 展开更多
关键词 幼龄胶园 间种 土壤微生物作用
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