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我省稻田土壤肥力低,养分相对贫乏,特别是磷、氮不足,一向是影响农业生产发展的主要问题。近两年,施磷面积和用量不断增加,以1980年为例,全省施标准磷肥55万吨,平均亩施磷肥29斤,总施用量比1975年增加40%。但也出现少数地区施量过大,致使磷肥效果下降,造成增产不增收,有的因施用方法不当,肥效不显著,甚至认为“磷肥不灵”。为了更好地发挥现有磷肥的经济效益,促进水稻增产,我们从总结现有试验资料入手,就稻田施用磷肥几个技术措施作一综述。
The fertility of paddy fields in our province is low, and the relative lack of nutrients, especially phosphorus and nitrogen, has always been a major problem that affects the development of agricultural production. In the past two years, the area and amount of phosphorus applied have been increasing. Taking 1980 as an example, the province applied 550,000 tons of standard phosphate fertilizer and an average of 29 kg of phosphate fertilizer per mu. The total application rate increased by 40% over 1975. However, excessive application of phosphorus in a few areas also led to a decrease in the effect of phosphate fertilizer, resulting in no increase in yield and some inapplicable methods. In order to give full play to the economic benefits of existing phosphate fertilizer and promote rice yield, we start with summarizing the existing experimental data and reviewing some technical measures of applying phosphate fertilizer in paddy field.