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以江苏省8个土样进行盆栽试验,3个土样进行干土效应试验,供试作物分别为黑麦草和水稻.结果表明,黑麦草4次耗竭吸收的总钾量减去种植后土壤交换性钾的下降所剩余的值比热硝酸提取的缓效钾种植前后的降低量要大,说明矿物钾是在不断释放出来供作物吸收.干土处理后其速效钾含量均提高,水稻吸钾量所表示的干土效应达27.1—159.1%,其顺序为淤土大于壤土大于砂土,耕作或免耕对干土效应亦有一定影响.
Pot experiments were conducted on 8 soil samples from Jiangsu Province and 3 soil samples were tested on dry soil effect.The results showed that the total potassium content of ryegrass four times depleted and absorbed less soil exchange after planting Potassium decreased more than the value of hot nitric acid extracted slow potassium before and after planting to reduce the amount of large, indicating that mineral potassium is continuously released for crop absorption dry soil after treatment, its available potassium content were increased, potassium The amount of dry-soil effect is 27.1-159.1%. The order is that the silt soil is larger than the loam soil, and the tillage or no-tillage also has an effect on the dry soil effect.