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磷在土壤中的转化是比较复杂的问题,它在不同土壤条件下转移速度与可溶程度都有很大的差别。我们曾在1961年用P~(32)标记检定了过磷酸钙在淋溶黑土中的下移状况。试验证明,当土壤湿度保持在土壤田间持水量60％的条件下,三个星期以后,只能下移3—5厘米。1962年的试验,也证实了这一点,向下移动4—5厘米,向水平方向移动只有3—4厘米。磷在土壤中转移这样慢,与该土壤理化性质有很大关系,因为磷在土壤中被其他因子所吸收。为了查明磷肥在黑龙江省的两个土类——白浆士与淋溶黑
The transformation of phosphorus in soil is a complex problem. It has very different transition speed and soluble degree in different soil conditions. We used the P32 mark in 1961 to check the descending status of SSP in leaching black soil. Tests show that when soil moisture is maintained at 60% of the soil field water conditions, after three weeks, only down 3-5 cm. The 1962 test also confirmed this, moving 4-5 cm downward and 3-4 cm horizontally. Phosphorus in the soil so slowly transferred, and the physical and chemical properties of the soil has a lot to do, because phosphorus in the soil by other factors to absorb. In order to identify two soil types of phosphate fertilizer in Heilongjiang Province - white pulp and leaching black