摘要
【目的】研究不同施氮量条件下棉花植株对氮、磷、钾养分的吸收规律。【方法】采用纯氮单因子随机区组设计，设6个施氮处理。取样株测定各器官的氮、磷、钾养分吸收量。【结果】产量水平最高的№处理棉花植株氮、磷、钾积累的旺盛时期分别出现在播种后的54～110d、57～120d、44～89d，比其它处理出现的早而且持续的时间长；棉花最高籽棉产量的施氮量为348．32kg／hm^2，经济施氮量为320．46kg／hm^2。【结论】各处理棉花植株氮、磷、钾养分积累量均呈现苗期积累小，蕾期迅速增大，花铃期达到高峰，吐絮期又有所减小的趋势。
[Objective and Method]The purpose of this research was to reveal the absorption law Of nitrogen, phosphorus and potassium nutrient by cotton plant under different nitrogen fertilizer rate. [ Result and Conclusion] The results demonstrated that when there was minimum accumulation of nitrogen, phosphorus and potssium of cotton plant with different treatments in the seedling stage of cotton, it was increased in bud stage, it reached a peak in flower boiling stage,but it was decreased in boll opening state. Among all the treatments, the productive period of accumulation of nitrogen, phosphorus and potassium treated with N2 was the longest, which reached 54 - 100 d, 57 - 120 d, 44 - 89 d, respectively after sowing, which was earlier and longer than that of other treatments. The nitrogen fertilizer rate of the highest seed cotton yield was 348.32 kg/hm^2, the economic nitrogen fertilizer rate was 320.46 kg/hm^2.
出处
《新疆农业科学》
CAS
CSCD
北大核心
2010年第1期141-145,共5页
Xinjiang Agricultural Sciences
基金
农业部公益性行业科研专项(nyhyzx07-005)
新疆维吾尔自治区科技厅项目(2001BA507A-10)
国家科技部"十一五"支撑计划项目(2006BAD21B02-1)
新疆维吾尔自治区教育厅项目(XJEDU2006I63)
关键词
棉花
养分积累
施氮量
cotton
nutrient accumulation
nitrogen application rate
