The high water content of corn grain at harvest is a challenge in Northeast China,where the growing season is short.Using a dehydrating agent before harvest can help corn seeds dehydrate quickly.The dry matter accumul...The high water content of corn grain at harvest is a challenge in Northeast China,where the growing season is short.Using a dehydrating agent before harvest can help corn seeds dehydrate quickly.The dry matter accumulation and nutrient quality of maize were systematically studied by field experiments and instrumental analysis using maize varieties of different maturities as test materials.The results showed that the accumulation of dry matter was enhanced by an increased dosage of a dehydrating agent.When the dehydrating agent dosage reached 1800 mL•hm-2,the dry matter accumulation of early-maturing varieties increased by 24.1 g,and the water content decreased by 8.08%.Different maize varieties were treated with the same dose;early-maturing varieties showed significant effects on grain dry matter accumulation,and kernel dry matter accumulation increased by 7%.The effects of different doses on grain dehydration were obvious,and the effects on different maize varieties varied.Medium-ripening maize varieties showed the most significant effect,with a 19.5%reduction in water content.The effects of dehydrating agent doses on maize yield,grain nutrient quality and seed germination rate were not significant.Therefore,a dehydrating agent promoted the accumulation of dry matter in grain and accelerated the rapid dehydration.展开更多
An uneven herbicide distribution can lead to reduced efficacy,and the release of herbicide residues and their transformation products into the environment through runoff increases their potential use risk.Understandin...An uneven herbicide distribution can lead to reduced efficacy,and the release of herbicide residues and their transformation products into the environment through runoff increases their potential use risk.Understanding the water distribution dynamics of commonly used paddy field herbicides,for example,oxadiazon,is imperative for the long-term management of weeds in paddy fields.To clarify the diffusion and sedimentation ability of oxadiazon with the addition of a nonionic surfactant—diffusion and settling agent(DSA)for subsequent commercial use in paddy field water layers,the synergistic mechanisms of DSA with butachlor and bensulfuron-methyl in paddy fields were studied.Bioassays,instrumental analysis and field experiments were conducted in this research to provide a relevant basis for improving the efficacy of paddy field herbicides.The field experiment results indicated that DSA could increase the plant and fresh weight control effects of oxadiazon(450 g a.i.·hm^(-2)),butachlor and bensulfuron-methyl to different degrees.These findings demonstrated that DSA could not only effectively improve oxadiazon diffusion and settling in water layers and significantly increase the control effects of butachlor and bensulfuron-methyl,but also promote crop growth and development to different degrees.展开更多
目的探讨2周的输尿管支架体内置入时长对男性患者支架相关性功能障碍的影响。方法分析2021年1-12月昆明理工大学附属安宁市第一人民医院泌尿外科85例由结石导致上尿路梗阻患者在支架置入前、置入后2周和取出后2周的情况,使用微信扫描二...目的探讨2周的输尿管支架体内置入时长对男性患者支架相关性功能障碍的影响。方法分析2021年1-12月昆明理工大学附属安宁市第一人民医院泌尿外科85例由结石导致上尿路梗阻患者在支架置入前、置入后2周和取出后2周的情况,使用微信扫描二维码进行问卷调查,包括国际勃起功能指数(International Erectile Function Index,IIEF-5)、前列腺症状评分(International Prostate Symptom Score,I-PSS)和生活质量评分表(Quality of Life,QOL)。研究者记录患者体质量指数(Body Mass Index,BMI)、职业、学历、年龄、吸烟史、饮酒史及支架远端袢在膀胱内位置。结果患者的不同职业、年龄、文化程度、BMI、吸烟、饮酒、支架膀胱内位置间性功能差异无统计学意义。术后2周的IIEF-5各子域得分及总分均低于术前和术后4周(均P<0.05)。术前与术后2周时勃起功能等级的差异无统计学意义(P>0.05),而术后4周的勃起功能等级高于术前和术后2周(P<0.05)。QOL及I-PSS的(对数值)平均水平在术后2周时上升,而在术后4周时下降且低于术前。结论输尿管支架会对男性性功能产生负面影响,置管时间控制在2周内有助于改善患者性生活,提高患者生活质量。展开更多
基金Supported by the Research and Development Plan of Applied Technology in Heilongjiang Province(GA19B104)。
文摘The high water content of corn grain at harvest is a challenge in Northeast China,where the growing season is short.Using a dehydrating agent before harvest can help corn seeds dehydrate quickly.The dry matter accumulation and nutrient quality of maize were systematically studied by field experiments and instrumental analysis using maize varieties of different maturities as test materials.The results showed that the accumulation of dry matter was enhanced by an increased dosage of a dehydrating agent.When the dehydrating agent dosage reached 1800 mL•hm-2,the dry matter accumulation of early-maturing varieties increased by 24.1 g,and the water content decreased by 8.08%.Different maize varieties were treated with the same dose;early-maturing varieties showed significant effects on grain dry matter accumulation,and kernel dry matter accumulation increased by 7%.The effects of different doses on grain dehydration were obvious,and the effects on different maize varieties varied.Medium-ripening maize varieties showed the most significant effect,with a 19.5%reduction in water content.The effects of dehydrating agent doses on maize yield,grain nutrient quality and seed germination rate were not significant.Therefore,a dehydrating agent promoted the accumulation of dry matter in grain and accelerated the rapid dehydration.
基金Supported by the National Natural Science Foundation of China(32072434)Scholar Backbone Project of Northeast Agricultural University(19XG02)。
文摘An uneven herbicide distribution can lead to reduced efficacy,and the release of herbicide residues and their transformation products into the environment through runoff increases their potential use risk.Understanding the water distribution dynamics of commonly used paddy field herbicides,for example,oxadiazon,is imperative for the long-term management of weeds in paddy fields.To clarify the diffusion and sedimentation ability of oxadiazon with the addition of a nonionic surfactant—diffusion and settling agent(DSA)for subsequent commercial use in paddy field water layers,the synergistic mechanisms of DSA with butachlor and bensulfuron-methyl in paddy fields were studied.Bioassays,instrumental analysis and field experiments were conducted in this research to provide a relevant basis for improving the efficacy of paddy field herbicides.The field experiment results indicated that DSA could increase the plant and fresh weight control effects of oxadiazon(450 g a.i.·hm^(-2)),butachlor and bensulfuron-methyl to different degrees.These findings demonstrated that DSA could not only effectively improve oxadiazon diffusion and settling in water layers and significantly increase the control effects of butachlor and bensulfuron-methyl,but also promote crop growth and development to different degrees.
文摘目的探讨2周的输尿管支架体内置入时长对男性患者支架相关性功能障碍的影响。方法分析2021年1-12月昆明理工大学附属安宁市第一人民医院泌尿外科85例由结石导致上尿路梗阻患者在支架置入前、置入后2周和取出后2周的情况,使用微信扫描二维码进行问卷调查,包括国际勃起功能指数(International Erectile Function Index,IIEF-5)、前列腺症状评分(International Prostate Symptom Score,I-PSS)和生活质量评分表(Quality of Life,QOL)。研究者记录患者体质量指数(Body Mass Index,BMI)、职业、学历、年龄、吸烟史、饮酒史及支架远端袢在膀胱内位置。结果患者的不同职业、年龄、文化程度、BMI、吸烟、饮酒、支架膀胱内位置间性功能差异无统计学意义。术后2周的IIEF-5各子域得分及总分均低于术前和术后4周(均P<0.05)。术前与术后2周时勃起功能等级的差异无统计学意义(P>0.05),而术后4周的勃起功能等级高于术前和术后2周(P<0.05)。QOL及I-PSS的(对数值)平均水平在术后2周时上升,而在术后4周时下降且低于术前。结论输尿管支架会对男性性功能产生负面影响,置管时间控制在2周内有助于改善患者性生活,提高患者生活质量。
