Organic substrate change in the swine manure-applied vegetable soils
In order to study the change of organic substrate indices which included pH,organic matter(OM),total nitrogen(TN),total phosphorus(TP)and bio-available phosphorus in vegetable soils with swine manure application,the soils of the greenhouses were collected in a harmless vegetable base in which swine manure was used for 0~4 years respectively.The pH and the content of TN,TP,organic matter and bio-available phosphorus in the soils were analyzed respectively,and the data were tested using Fisher small sample non-parameter randomization.It would be gained that pH of the soil decreased,and the content of TN,TP,OM and bio-available phosphorus in soil increased.