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玉米雌雄穗发育的影响因素
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作者 胡俊芳 李刚 陈须琨 《中文科技期刊数据库(全文版)农业科学》 2021年第12期48-49,共2页
栽培管理缺乏合理性、气候影响、不同品种的异质性,是影响玉米雌雄穗发育的主要因素。采取科学选择品种、科学确定适宜播期、强化播种质量、科学密植、合理运筹肥水、及时开展病虫害防治工作、人工授粉等措施,可保证玉米穗健康发育,有... 栽培管理缺乏合理性、气候影响、不同品种的异质性,是影响玉米雌雄穗发育的主要因素。采取科学选择品种、科学确定适宜播期、强化播种质量、科学密植、合理运筹肥水、及时开展病虫害防治工作、人工授粉等措施,可保证玉米穗健康发育,有效提高玉米产量。 展开更多
关键词 玉米雌穗 玉米雄穗 发育影响因素
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花都地区岩溶发育规律及影响和控制因素研究 被引量:3
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作者 董娜 《广东建材》 2010年第8期6-9,共4页
本文对广州市花都地区岩溶发育情况进了探讨,首先简要介绍了工作区地质和水文地质背景;接着从本次工作的依据入手,介绍了了本次工作有关情况。文中重点介绍了区内主要岩溶含水层及其分布、溶洞发育及垂向分布规律、充填及富水性等情况,... 本文对广州市花都地区岩溶发育情况进了探讨,首先简要介绍了工作区地质和水文地质背景;接着从本次工作的依据入手,介绍了了本次工作有关情况。文中重点介绍了区内主要岩溶含水层及其分布、溶洞发育及垂向分布规律、充填及富水性等情况,并分别从岩性、地貌、构造、埋深、地下水活动情况及古水文网发育状况等方面分析了其对岩溶发育的影响和控制作用。 展开更多
关键词 花都地区 岩溶含水层 溶洞 岩溶发育影响和控制因素
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上海县青少年生长发育状况的动态分析
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作者 顾三弟 刘建中 《复旦学报(医学版)》 CAS CSCD 1993年第S1期103-106,共4页
动态分析上海县1975~1990年15年间青少年生长发育的变化,发现1990年7~17岁男女学生的身高和体重比1975年同龄学生平均增高为男3.2cm,女2.8cm,增重为男1.8kg、女2.2kg。此与同期的经济水平、学生的营养供给和健康状况等有着密切关系。... 动态分析上海县1975~1990年15年间青少年生长发育的变化,发现1990年7~17岁男女学生的身高和体重比1975年同龄学生平均增高为男3.2cm,女2.8cm,增重为男1.8kg、女2.2kg。此与同期的经济水平、学生的营养供给和健康状况等有着密切关系。据统计,上海县1990年比1975年的社会总产值增加12.1倍,国民生产总值增加7.6倍,工农业总产值增加2.9倍;1985年中学生膳食热能摄入量比1980年增加21.1%,蛋白质摄入量增加4.4%;对青少年健康危害较大的肠道寄生虫病减少,蛔虫感染率从1976年的95.1%下降到1990年的28.8%,14年间下降了69.7%。 展开更多
关键词 青少年 生长发育的长期趋势 生长发育影响因素
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Loto'i Tonga: Success by Achievement--A Case Study
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作者 Malakai Ofanoa Samuela Ofanoa Peter Huggard Stephen Buetow 《Sociology Study》 2016年第6期402-409,共8页
Loto'i Tongas"the big heart"-is a term describing all that is Tongan: the passion, joy, spirit, and the mind. This quality of being Tongan shapes the way in which Tongans work together to achieve successful outcom... Loto'i Tongas"the big heart"-is a term describing all that is Tongan: the passion, joy, spirit, and the mind. This quality of being Tongan shapes the way in which Tongans work together to achieve successful outcomes. Loto'i Tonga influences activities such as community development projects, social and health services initiatives, as well as the passion seen when Tongan engages in sporting activities. This case study describes a community development project in West Auckland, New Zealand, which brought together the Tongan community. The primary aim of the project was to improve the health and wellbeing of Tongans living in West Auckland. Conducted over several years, the project resulted in the establishment of vegetable gardens, a Tongan pre-school centre, and a woman's home-based development initiative resulting in the production of a variety of crafts as well as well-being activities. These successful outcomes provide a clear message to both Tongan and non-Tongan leaders that a way to success in Tongan community development is to empower Tongans to be able to lead and take control over determinants of their life and their well-being. Loto'i Tonga is a key cultural value that determines such outcomes. 展开更多
关键词 Loto'i Tonga Tou'anga Tokanga Falehanga EMPOWERMENT Talanga
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The Situation and Development Strategy Research for Reserve Athletes in Ordinary Universities
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作者 Wei Bao 《International Journal of Technology Management》 2014年第12期94-95,共2页
With transformation of Chinese sports talents cultivation mode, sports team construction at high level in universities has made great achievements. Especially establishing reserves in key universities is the key step ... With transformation of Chinese sports talents cultivation mode, sports team construction at high level in universities has made great achievements. Especially establishing reserves in key universities is the key step of new mode, which is the primary mode of sports team at high level in ordinary universities. To research the situation of key sports team construction at high level, from the degree of competitive sports sustainable development, we research and analyze the cultivation mode of Chinese sports talents and influence factors, aiming at building a talents cultivation mode suitable for Chinese professional competitive sports development and exploring the sustainable way for athletes sports in theory. 展开更多
关键词 Ordinary University Competitive Sports and Reserves
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