论文部分内容阅读
对热带地区柱花草生产的主要限制因子——磷进行了盆栽和田间试验研究，以探索柱花草的营养诊断适宜值和海南地区缺磷土壤的磷肥用量。试验表明，施用磷肥能提高产量、改善品质，随磷肥用量的增加，柱花草含磷量和粗蛋白含量提高；柱花草营养诊断的适宜磷含量为０．１４％～０．３４％，磷含量与采样时间无明显差异；根据磷肥试验建立的回归模型Ｙ＝５３２４．８５＋７４５．０５Ｘ－５０．５５Ｘ２，海南缺磷土壤推茬施磷（Ｐ２Ｏ５）量为：５２．５～９７．５ｋｇ／ｈｍ２（过磷酸钙３２９～６０９ｋｇ／ｈｍ２），最大施磷（Ｐ２Ｏ５）量应低于１１０ｋｇ／ｈｍ２。
In this paper, pot and field experiments were conducted on the main limiting factor for the production of Stylosanthes in the tropical zone in order to explore the optimum nutrition value for Stylosanthes and the phosphorus application in the phosphate-deficient soil in Hainan. The results showed that the application of phosphate fertilizer could increase the yield and improve the quality. With the increase of the amount of phosphate fertilizer, the content of phosphorus and crude protein increased. The suitable phosphorus content for column nutrition was 0.14% -0.34% And the sampling time was no significant difference. According to the regression model Y = 5324.85 + 745.05X-50.55X2 established by the experiment of phosphate fertilizer, the amount of phosphorus (P2O5) in the phosphorus-deficient soil in Hainan Province was 52.5 ~ 97.5kg / hm2 Superphosphate 329 ~ 609kg / hm2), the maximum amount of phosphorus (P2O5) should be less than 110kg / hm2.