论文部分内容阅读
研究了广东主要水稻土对磷的缓冲能力及定量施肥技术.结果表明,不同母质发育的土壤其磷肥指数差异较大,即使是同一母质发育的土壤,由于其发育与演变的过程及时间不同,亦有不同的磷肥指数.根据土壤对磷的缓冲能力和土壤有效磷指标预报施磷,方法准确、实用,可实行因土因产定量施肥.经过多年的大面积验证,证明此技术具有明显的节磷增产或增磷增产的良好效果.
This paper studied the buffering ability of phosphorus and the technique of quantitative fertilization on main paddy soils in Guangdong province.The results showed that there was a great difference in P fertilizer index between soils with different parent materials, even though the soil with the same parent material had different development and evolution process, Also have different index of phosphorus fertilizer.According to the soil phosphorus buffer capacity and soil available phosphorus index prediction of phosphorus, the method is accurate and practical, can be implemented because of soil production and quantitative fertilization.After many years of large area verification, this technology has obvious Section phosphorus yield or increase production of phosphorus good results.