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磷肥在河南省的农业增产中有重要的作用,不少科研和生产单位对磷肥的施用技术等进行了大量研究并取得一定成果。我们在此基础上又采用土培(盆栽),坑栽(微区),田间试验和大面积调查等方法,结合土壤普查,对全省主要土壤的含磷状况以及磷肥的有效施用条件等问题做了进一步研究,现将结果整理报道如下。 一、土壤磷的状况 根据全省不同上类的608个土样(0—20厘米)分析结果,土壤全磷含量(指P_2O_5,以下同)在0.010-0.238%之间,多数在0.1%左右(表1)。在同一土类中,不同母
Phosphate fertilizer in Henan Province has an important role in agricultural production, many scientific research and production units on the application of phosphate fertilizer technology conducted a lot of research and achieved some results. Based on this, we adopted the methods of soil culture (potted), pit planting (field), field trials and large-area surveys, combined with the soil survey to analyze the phosphorus status of the main soils in the province and the effective application conditions of the phosphate fertilizer Made further research, the results are now reported as follows. First, the status of soil phosphorus According to the province’s different class of 608 soil samples (0-20 cm) analysis of the results, the total phosphorus content of soil (referring to P_2O_5, the same below) between 0.010-0.238%, mostly in about 0.1% (Table 1). In the same soil class, different mother