摘要
试验于1985～1986年在湖南农学院教学实验场进行。结果表明,在长沙地区供试土壤条件下,氮、磷、钾三要素其中两个因素固定在一定水平时,随着氮或钾施用量的增加,子棉产量成规律性的二次曲线变化,但磷对产量的影响没有规律。氮、磷、钾之间的交互作用以磷,钾的最强。
Two years' field experiments indicate that when two factorsout of three are fixed to a certain level, the seedcotton yield varies in aquadratic curve with the increase of nitrogen or potassium, whereas the yield ofseedcotton doesn't vary regularly with the increase of phosphorus, which maybe due to the availability of phosphorus in soil.The interaction between phosphorus and potassium is the strongest of allthree interactions and a good combination is 12~15kg N, 2.5~5kg P_2O_5 and 5~7 kg K_2O per mu.
关键词
棉花
栽培
产量
氮
磷
钾
施肥
Cotton
Yield
Nitrongenous fertilizer
Phosphatic fertilizer
Potassium fertilizer
