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氮肥随水施用可显著提高棉花单株铃数、单铃重和籽棉产量,促进棉花对氮、磷素的吸收,尤其在壤土棉田的效果较明显。随水施用磷肥对棉花单株铃数影响不大,籽棉产量较不施磷肥处理提高8.80～17.40%,其在壤土棉田上的增产效果优于粘土棉田。磷肥随水滴施可提高氮、磷肥料利用率,与基施相比氮肥利用率提高4.85～12.34%,磷肥利用率提高36.75～45.88%,且在壤土棉田上的施用效果优于粘土棉田。
Nitrogen fertilizer application significantly increased the number of bolls per plant, boll weight and seed cotton yield, and promoted cotton’s absorption of nitrogen and phosphorus, especially in loamy cotton fields. The application of P fertilizer with water had little effect on boll number per plant, and the yield of seed cotton increased by 8.80 ~ 17.40% compared with no P treatment. The yield increase effect on loam soil was better than that on clay soil. Phosphorus fertilizer can improve nitrogen and phosphorus fertilizer utilization rate with water drop application. Compared with basal application, nitrogen fertilizer utilization efficiency increases by 4.85-12.34% and phosphorus utilization efficiency increases by 36.75-45.88%. The application effect of phosphorus fertilizer on loamy cotton fields is better than clay soil.