新疆高产棉花的钾肥施用效果

Response of High yielding Cotton to Potash Fertilizer in Xinjiang

研究表明 ,钾肥在新疆主要棉田土壤上施用 ,对高产棉花有显著的增产作用 ,增产效果南疆大于北疆。施钾可提高棉花的单铃重和单株铃数。在一定氮磷施用条件下 ,最高产量的施钾( K2 O)量 ,南疆为 13 3 .3 kg/ hm2 ,北疆为 146.8kg/ hm2 。本试验条件下获得棉花高产 ,其氮磷钾施用比例 ,南疆为 N∶ P2 O5∶K2 O=1∶ 0 .50∶ 0 .4 8,北疆为 N∶ P2 O5∶ K2 O=1∶ 0 .50∶ 0 .53。

The results of the field experiments showed that potash fertilizer which applied in staple soil of the cotton field in Xinjiang could increase the yield of cotton remarkably. The increasing effect in the South of Xinjiang was better than that in the North of Xinjiang. Potash fertilizer could increase the weigh and number of cotton boll. In the same of applying N and P 2O 5, the amount of applying K 2O of obtaining the max yield was 133.3kg/hm 2 in the South of Xinjiang and 146.8kg/hm 2 in the North of Xinjiang. In this experiment, to obtain the high yield of cotton, the ratio of N, P 2O 5 and K 2O was that, N∶P 2O 5∶K 2O=1∶0.50∶0.53 in South and N∶P 2O 5∶K 2O=1∶0.50∶0.53 in North. The increasing effect of KCl and K2SO4 was same.