氮·钾配施对小麦产量的调控效应

Effects of Combined Application of Nitrogen and Potassium on Wheat Yield

试验结果表明：适宜的氮、钾用量配比可显著提高小麦的穗数、株高、穗长、穗粒数和千粒重，从而促进产量的显著提高。配施氮钾肥的小麦增产61．3％～110．9％。该试验条件下，以处理N3K2（N210kg／hm^2＋K2O150kg／hm^2）产量最高，适宜的氮钾比为1.4：1。

The results of potted experiments indicated that combined application of N and K at an appropriate rate could improve wheat grain yield significantly by 61.3% - 110.9% due to notable enhancement of spike number of wheat, plant height, spike length, grains per spike and 1000-grain weight. Under the experimental condition, at the N fertilizer usage of 1.4 g/pot and K fertilizer usage of 1.0 g/pot （ N：K = 1.4 ： 1 ）, wheat accessed to maximum yield. There was significant positive interaction between N and K on wheat grain yield.