论文部分内容阅读
采用张守敬和Jackson(1957年)提出的土壤无机磷分组测定方法,对施肥17年的蔬菜保护地土壤无机磷的形态及其剖面分布规律进行了研究。结果表明,土壤无机磷组分及其剖面分布受施入的有机肥影响较大。施有机肥组(A组),土壤中O-P含量占无机磷总量百分数最高,平均为35%～47%;不施有机肥组(B组),土壤中Ca-P含量占无机磷总量百分数最高,平均为29%～39%。长期施用有机肥能够增加20cm以下土层中无机磷含量;施有机肥组(A)和不施有机肥组(B)各处理土壤不同形态无机磷含量均随土层加深而逐渐降低,但在0～60cm土层内,有机肥组不同形态无机磷含量均高于不施有机肥组。长期施用磷肥会增加土壤中无机磷的积累量,而且有效性较高的Ca-P、Al-P积累程度高于较稳定的O-P、Fe-P积累程度。
In this study, the determination of inorganic phosphorus in soil with 17-year fertilization and profile distribution was carried out by using soil inorganic phosphorus determination method proposed by Zhang Shoujing and Jackson (1957). The results showed that the composition and distribution of inorganic phosphorus in soil had a great influence on the organic manure applied. In the organic fertilizer group (group A), the content of OP in the soil accounted for the highest percentage of the total amount of inorganic phosphorus, with an average of 35% -47%. Without organic fertilizer (group B), the content of Ca- The highest percentage, an average of 29% to 39%. Long-term application of organic manure can increase the content of inorganic phosphorus in the soil below 20 cm. The contents of inorganic phosphorus in different forms of organic manure (A) and organic manure (B) decreased gradually with the deepening of soil depth, In 0 ~ 60cm soil layer, the contents of inorganic phosphorus in different organic manure groups were higher than those in the organic manure control group. Long-term application of phosphate fertilizer will increase the accumulation of inorganic phosphorus in soil, and the more effective accumulation of Ca-P and Al-P is higher than the more stable accumulation of O-P and Fe-P.