摘要
通过田间小区试验,对不同氮肥用量下棉株的棉铃数量与分布及其随生育进程的变化进行了研究。结果表明:有效棉铃数量与氮肥施用量密切相关,蕾铃脱落率与氮肥施用量呈显著负相关,充足的氮素营养是增加有效铃数和降低脱落率的必要条件;施用氮肥延长棉铃增长的时间,并相对滞后脱落率上升的趋势;施用氮肥增加了棉株各个部位的有效铃数,尤其提高了中下部果枝上有效铃所占比重,同时施用氮肥降低了中下部果枝上的蕾铃脱落率。
The relationship of amount and distribution of cotton bolls with N rates during growth period was studied through field experiments. The main results were as follows: number of available cotton bolls were strongly correlated with N rates, and shedding rates of buds and bolls were negatively correlated with N rates; abundant nitrogen nutrition were the necessary condition to increase available bolls and decrease shedding rate; applying nitrogen fertilizer prolonged the duration of cotton bolling increase and delayed the increasing trend of shedding rates; applying nitrogen fertilizer increased number of available bolls on different fruit branches, especially enhancing the proportion of cotton bolls on the middle and lower branches, and reducing shedding rates of bolls on the middle and lower branches.\;
出处
《干旱地区农业研究》
CSCD
北大核心
2005年第1期95-98,共4页
Agricultural Research in the Arid Areas
基金
中国科学院创新项目(KZCX1-08-01)
中国科学院农业项目(NB十五-E02)
