摘要
本文研究了棉花早熟品种的吸收养分特点,提出了一生吸收积累养分动态方程;应用导数,成功地得到了棉花一生吸收养分的变速率、变加速率动态变化规律;根据棉花早熟品种一生变加速率的动态变化,提出氮素化肥如果需要追施,应在现蕾后进行。田间氮肥适宜施用时期试验证明,早熟品种施用适量氮素化肥,在有一定保肥能力的土壤上,可全做基肥或者基施、蕾追各半为最宜。与其吸收养分特点研究结果相一致。
Characteristics of nutrient absorption of cotton variety with early—maturity was stu died and the dynamic equation of the nutrient absorption and accumulation in the whole season was suggested. The dynamic regulation of the rate of speed changes and changed accelerating speed of nutrition absorption by cotton during the whole growing season were successfully obtained by application of derivatives. According to the above results, the nitrogen chemicals should be applied after the squaring stage. The experiment on the premium N application showed that, on the fertile soils with a certain keeping ability, N application to the early cotton varieties could be used as basic fertilizer or half and half for basic application and during the squaring period. The result is cordinated with the characteristics of the nutrient absorption.
出处
《棉花学报》
CSCD
北大核心
1992年第2期47-51,共5页
Cotton Science
关键词
棉花
早熟品种
吸收养分
施氮时期
cotton
early-maturing variety
the characteristics of nutrient absorption
application time of N fertilizer
