论文部分内容阅读
我省六种土壤上的177个水稻钾肥田间试验结果表明:大部分类型土壤上施用钾肥均有良好的增产效果,其趋势是酸性紫色土>潮土>黄泥>中性紫色土>碱性紫色土。施钾效果大小与土壤钾素含量密切相关(有效钾(K)y=64.4-0.424x r=-0.569,迟效钾y=58.5-0.092x r=-0.576),土壤有效钾含量在60ppm、缓效钾180ppm以下时,施用钾肥效果明显。我省大部分土壤的适宜施钾量为K_2O3～6公斤/亩,施用农家肥能缓解土壤钾素的亏损和水稻对钾的需要。
The results of field experiments on 177 potassium fertilizers in six soils of our province showed that potassium fertilization on most soil types had a good yield increasing effect. The trend was acid purple soil> tidal soil> yellow soil> neutral purple soil> alkaline Purple soil. The effect of K application was closely related to soil K content (available potassium (K) y = 64.4-0.424 × r = -0.569, available potassium y = 58.5-0.092 × r = -0.576), soil available K content was 60 ppm, Potassium 180ppm or less, the obvious effect of potassium fertilizer. Most of the soil in our province suitable for potassium K_203 ~ 6 kg / mu, the application of manure can ease the loss of soil potassium and rice potassium needs.