摘要
经研究白浆土在淹水条件下磷素组成形态以无机态磷为主，占全磷的６８．４％，有机态磷仅占３１．６％，在无机态磷中以闭蓄态磷为主，占全磷的５０．９％。其磷素释放量相当于每公顷施三料过石２４７．５公斤。从而改变了旱作条件下土壤速效磷含量低，作物难以利用的弊端。
Experimental results showed that the composed form of phosphorus of podzoluvisol under submerge was mainly inorganic one, which accounted for 68. 4% of total Phosphorus,while organic form of Phosphorus was only. 31.6%. of the inorganic Phosphorus, 50.9% of the total phosphorus was in Closed saving form. The releasing amount of phosphorus was equal to dressing 247.5kg/hm2 triple superphosphate, which overcome the shortage of lower available P and unavailable for crops under upland cropping conditions. This result supplies with reliable theoretical basis for exploiting phosphorus resource and reasonably utilizing pedzoluvisols.
出处
《黑龙江农业科学》
北大核心
1996年第3期9-11,共3页
Heilongjiang Agricultural Sciences
关键词
白浆土
淹水
磷素组成形态
释放量
Podzoluvisdol, Submerge, Composed form of p, Releasing amount
