摘要
在赣北彭泽县棉区土壤肥力水平条件下,采用氮、磷、钾3个因素4个水平的施肥设计,研究了不同施肥水平对棉花的增产增效作用,结果显示:氮肥施用量过低或过高都会导致棉花减产,而土壤磷、钾素供应能力较高时,施磷、钾肥对棉花产量影响不显著。氮、磷、钾三元效应方程拟合为y=113.25+6.8089 N-0.117 P+16.935 K-0.433O NP+1.3891 NK-0.015 PK-0.156 N^2+0.0934 P^2-0.355 K^2,复相关系数r=0.99,获得经济最佳籽棉产量4470.55 kg/hm2的优化施肥方案是纯N为404.4 kg/hm2,P_2O_5为150.8 kg/hm^2,K_2O为170.1 kg/hm^2,在彭泽棉区冲积土植棉稳氮、足磷、少钾有利于棉花增产。
Under the conditions of the soil fertility level in Pengze County of Northem Jiangxi, the three factors of nitro- gen, phosphorus and potassium with four level fertilization experiments were designed to study the increasing yield efficiency on cotton in different fertilization level. The results showed that low or high nitrogen application rate could lead to decrease cotton yield, but it had no significant influence on cotton yield with the application of phosphorus and potassium in this soil which could supply quite high phosphorus and potassium. The ternary effect equation fitting of N, P, K y = 113.25 ＋ 6.8089 N- 0. 117 P ＋ 16.935 K- 0.4330 NP ＋ 1. 3891 NK- 0.015 PK- 0. 156 N2 ＋ 0.0934 p2 - 0.355 K2, the multiple correlation coefficient r = 0.99, the optimal fertilizing scheme of obtaining the economic optimal seed cotton yield was that pure nitrogen was 404.4 kg/hm2, P2O5 Was 150.8 kg/hm2, K2O was 170.1 kg/hm2. The method of stable nitrogen, sufficient phosphorus and less potassium was advantageous to increase cotton yield in alluvial soil in Pengze County of Northem Jiangxi.
出处
《棉花科学》
2016年第4期29-34,共6页
Cotton Sciences
基金
江西省农作物测土配方施肥补贴项目(赣财农指[2014]113号)
关键词
棉花
肥料配比
最佳施肥量
施肥模型
Cotton
Fertilizer allocated proportion
Optimal fertilizing amount, Fertilization pattern
