【摘要】 关于育苗移栽棉花高产栽培中氮、磷、钾的施用量,连续3年的田间试验结果指出,在供试土壤条件下,当氮磷钾三要素中的磷钾或氮磷两因素固定在一定水平时,随着氮或钾施用量的增加,子棉产量呈规律性的二次曲线变化,但磷的效果不明显。在限制用钾的条件下,优化组合中三要素的施用量为:N12～15公斤/亩,P₂O₅ 2.5～5公斤/亩,K₂O 5～7公斤/亩。更多还原

【Abstract】 The results of field experiments for three years about the effects of application rates of ni- trogen,phosphorus,potassium and their interaction on seedcotton yield of transplanting cotton indicate that,under the condition of Hunaa province,when two factors among ni- trogen,phosphorus and potassium are fixed to a certain level,the seedcotton yield in- creased with increasing the rate of nitrogen appfication or of potassium application,after certain extent the yield of seedcotton declined progressively.But phosphorus has little effect on yield of seedcotton,it may be due to having available soil phosphorus more than 15ppm. The interaction between phosphorus and potassium is the strongest one among three factors mentioned above.It is a better combination to apph N12～15 kg,P₂O₅2.5～5kg and K₂O5 ～7kg per mu.更多还原