不同钾肥品种和用量对小麦产量品质和养分吸收利用的影响

Effects of different K sources and rates on grain yield, quality and nutrient absorption of wheat

在河南滑县试验点,比较几种钾肥品种和罗布泊K2SO4不同用量在小麦上的应用效果,结果表明:增施钾肥可以提高小麦产量,促进小麦氮素吸收、提高小麦蛋白质和氨基酸含量,在同等用量条件下,罗布泊K2SO4的施用效果好于或接近于其他钾肥。当施钾量为135 kg/hm2时,其籽粒产量、生物产量、籽粒养分含量、籽粒氨基酸含量和生产利润最高,施钾量为180 kg/hm2时,其籽粒蛋白质含量最高。回归方程计算表明,钾肥的最佳用量为121.4 kg/hm2,产值为10227.4元/hm2,最大利润为8392.0元/hm2。

An experiment was conducted in Huaxian, He＇nan Province to compare the effects of different kinds oi potassium fertilizers and their application rate on winter wheat under six potassium levels （0, 45, 90, 135, 180 and 225 kg/hm^2）. The results showed： potassium application could increase the yield, 1000-grain weight, the number of grains per ear, amino acid. the content of protein, but the untilization efficiency of potassium always went down after reaching some amount of potassium application. At the same rate of K application, the effect of Lop Nur KS2O4 was better or almost the same as other kinds of potassium. When the amount of K application was 135 kg/hm^2, these indexs were the biggest, including the grain yield, total yield, the content of nutrient in seed, amino acid and the profit. When the amount of K application was 180 kg/hm^2, the content of protein in seed was the biggest. Through the equatation, it showed that when the amount of K application was 121.4 kg/hm^2, the value of output was 10 227 .4 Yuan/hm^2 and the profit was 8 392.0 Yuan/hm^2.