摘要
[目的]研究滴灌条件下,不同产量棉花科学施肥氮、磷、钾配比、施用时间及施用量。[方法]利用Logistic方程,分析不同产量棉株各个生育期的氮、磷、钾的积累量。[结果]高产和中产棉株对氮磷钾最大积累量和积累最高速率远大于低产棉株。滴灌棉株出苗后40～95d左右是氮积累的旺盛期,出苗后51～110d左右是磷积累的旺盛期,出苗后47～90d左右是钾积累的旺盛期。[结论]保证棉株苗蕾至花铃前期吸收足量的氮,满足棉株花铃期到吐絮期对磷的高强度需求,并保持棉株生育后期对钾仍有旺盛的吸收能力,是形成棉花高产的重要因素。
[Objective]The aim was to study science fertilization of N,P,K application time and application rate for the different cotton developmental stage under the drip irrigation condition.[Method]The N,P,K accumulation of the different growth stages for the different developmental stage cotton were analysed with the Logistic equation.[Result]The the N、P、K accumulation and the rate of accumulation for the high yield cotton field and the medium high yield were more than the low yield.The N accumulation of the strong period was 40-95 d after the emergence.The P accumulation of the strong period was 51-110 d after the emergence.The K accumulation of the strong period was 47-90 d after the emergence.[Conclusion]Ensure the bud stage to before the flowering and boll-setting period absorb the adequate N,meet the demand of P in the flowering and boll-setting period to the boll opening stage and keep the supply capability of K in the later of cotton growing were the important factors for high-yielding cotton.
出处
《安徽农业科学》
CAS
北大核心
2010年第25期13774-13776,13785,共4页
Journal of Anhui Agricultural Sciences
基金
新疆兵团攻关项目"微滴灌高效固体复合肥的研究与开发"(GKBOONKYGJ12NY)
"碳素对棉花生长及产量影响机制的试验与示范"(2006YD25)
关键词
滴灌
棉花
氮磷钾
模拟
Drip irrigation
Cotton
Nitrogen
Phosphorus
Potassium
Simulation model
