长期施钾对草甸土钾素动态变化及产量的影响  

Effect of Potash Application on the Dynamic Change of Potassium Content in Meadow Soil and Crops Yield

作　　者：李玉影 刘双全 吴英 林春芝 赵云峰[3] 升显江 

机构地区：[1]黑龙江省农科院土肥所,哈尔滨150086 [2]红兴隆农管局农科所 [3]方正县农业技术推广中心

出　　处：《黑龙江农业科学》2002年第1期26-27,共2页Heilongjiang Agricultural Sciences

基　　金：加拿大钾磷研究所和加拿大钾肥公司的资助

摘　　要：采用定位方法研究连年施用钾肥对草甸土土壤钾素动态变化及产量的影响。红兴隆草甸土钾素含量较高 ,施钾对大豆和小麦有一定的增产效果 ,但增产幅度不大。施钾肥结合秸秆还田对增加作物产量 ,提高钾肥利用率有积极作用。施钾肥和秸秆还田明显缓解土壤耕层速效钾和缓效钾含量的下降 。The method of fixed -site field experiment was adopted in the study. As the potassium content in meadow soil in Hongxinglong Farm is fairly high, the effect of potash application on the increase of crops yield was not very significant. The experimental result indicated that potash application combined with the wheat straw returning to the soil had a positive effect on crops yield and potash utilization efficiency. Potash application and the wheat straw returning to the soil have a significant effect on the decrease of available K and slow-released K content in the soil. It was very important for the balance of potassium content in the soil and the sustainable agriculture.

关 键 词：草甸土 钾肥 速效钾 缓效钾 产量 施肥 大豆 小麦 

分 类 号：S143.3[农业科学—肥料学] S565.106[农业科学—农业基础科学]