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土壤钾素供应,随成土母质的不同,其各种形态的钾含量、钾的固定和释放能力均不同,直接影响到作物的钾素营养及钾肥利用率。为探明不同成土母质钾素供应状况,合理施用钾肥,维持土壤钾素平衡,提高水稻单产,我们对江西主要水稻土壤类型钾素供应潜力进行了研究,现将研究结果介绍如下。 一、试验材料及方法 1.试验材料 选择有代表性的六种不同类型的水稻土,见表1。 2.试验方法 采用盆栽耗竭试验,设三种处理:
Soil potassium supply, with different parent materials, its various forms of potassium content, potassium fixation and release capacity are different, a direct impact on crop potassium nutrition and potassium utilization. In order to find out the status of potassium supply from different parent materials, rational application of potassium fertilizer, maintenance of soil potassium balance and improvement of rice yield, we studied the potential supply of potassium in paddy soil types of Jiangxi Province. The results are as follows. First, the test materials and methods 1. Test materials Select representative of six different types of paddy soil, see Table 1. 2. Test method using potting exhaustion test, set three kinds of treatment: