钾、锌、硒和优化施肥对轻度盐碱地玉米产量和肥料吸收的影响

研究了在农民习惯施肥基础上增施钾、锌、硒和优化施肥对轻度盐碱地玉米产量和肥料吸收的影响。结果表明：在农民习惯施肥基础上，适当增施有机肥、氮肥和钾肥以及增施微量元素锌、硒肥，可以提高轻度盐碱地玉米产量，其中以增施有机肥＋氮肥＋锌肥对产量提高程度最大；增施钾肥能显著提高盐碱地玉米对氮的吸收能力；增施锌肥降低了玉米秸秆对磷的吸收能力；增施硒肥降低玉米吸收钾的能力。

Effects of Potassium, Zinc, Selenium Fertilizers and Optimized Fertilization on Maize Yield and Fertilizer Absorption in Slight Saline and Alkaline Lands

The additional application of potassium,zinc and selenium fertilizers based on the farmer conventional fertilization and their optimized fertilization were studied to know the influences on the maize yield and fertilizer absorption in the slight saline and alkaline lands.The results showed that the maize yield could be increased by the additional application of organic,nitrogen,potassium,zinc and selenium fertilizers properly,especially the additional application of organic fertilizer mixed with nitrogen and zinc fertilizers.The additional application of potassium fertilizer could significantly improve the nitrogen absorbability of maize in saline and alkaline lands.The additional application of zinc fertilizer could reduce the absorbability of maize to phosphorus.The additional application of selenium fertilizer could decrease the absorbability of maize to potassium.