论文部分内容阅读
在安徽休屯盆地进行的10年肥料定位试验结果表明，土壤对水稻产量的贡献率明显大于肥料，施肥的增产幅度随施肥年限有逐年降低趋势。氮磷钾肥增产效应依次为K＞N＞P。长期施用有机肥可保持水稻稳定增产，但在等养分条件下，紫云英与氮磷钾化肥配施（MNP），早稻平均产量明显低于等养分的化服单施（NPK），说明有机肥应提早施人，并增加氮肥作基肥的比例，以满足水稻幼苗对养分的需求。施用化肥或有机肥除有效钾外，土壤养分均有增加。因此从增产增收和养分平衡的意义上讲，必须重视稻田施用钾肥，适当控制磷肥用量。
The results of 10-year fertilization experiments conducted in the Huduntun Basin in Anhui Province showed that the contribution of soil to rice yield was significantly greater than that of fertilizers, and the rate of increase of fertilizer application decreased year by year with the application of fertilizer. The yield-increasing effects of N, P, K were K> N> P. Long-term application of organic fertilizer can maintain stable rice yield, but under the same nutrient conditions, the average yield of MNP and early rice is significantly lower than that of the equivalent nutrient (NPK) Fertilizer should be applied early, and increase the proportion of nitrogen fertilizer for basal fertilizer to meet the needs of rice seedlings of nutrients. Fertilizers or organic fertilizer in addition to the available potassium, the soil nutrients have increased. Therefore, from the perspective of increasing yield and nutrient balance, we must attach importance to the use of potash fertilizer in paddy fields and properly control the amount of phosphate fertilizer.