论文部分内容阅读
在河南省黄泛平原沙土区进行多年多点田间试验．结果表明，砂土小麦磷肥的肥效与土壤Olsen－P含量呈y＝16．8432－10．881ogx（n＝33，r＝－0．9700**）极显著曲线负相关小麦相对产量和吸磷量与Olsen－P含量呈显著正相关．据此可以判断土壤供磷的丰缺程度．Olsen－P含量与小麦磷肥用量呈显著负相关，为生产实践中测土施磷提供了指标．
In the yellow pan-plains area in Henan Province for many years more field trials. The results showed that soil fertility and soil Olsen-P content of sandy soil were y = 16.8432-10.881ogx (n = 33, r = -0.9700 **), and there was a significant negative correlation between the relative yield of wheat and phosphorus uptake There was a significant positive correlation between the amount of Olsen-P and the content of Olsen-P. According to this, the abundance and deficiency of phosphorus in soil can be judged. There was a significant negative correlation between the content of Olsen-P and the amount of wheat P application, which provided an index for soil phosphorus application in production practice.