Abstract:

A pot experiment was conducted to study and compare the effects of vegetable waste water-loggedcompost on rapeseed’s yields, quality and nitrogen effects. 14 treatments were carried out: without fertilizer (CK) and different fertilizers and nitrogen gradient treatments. The research results showed that: with the increase of N application, the yields of treatments which applied vegetable waste water-loggedcompost at first increased, then decreased and the yields reached the highest in N application for 0.859 g per pot, and the rapeseed yields of treatments which applied chemical fertilizer treatments had a sharply rising trend; The nitrate content of the treatments which used vegetable waste water-loggedcompost were below safe concentration, but that of fertilizer treatments rose gradually and over security concentration with the increase of nitrogen; The nitrogen utilization and organic fertilizer mineralization rate of vegetable waste water-loggedcompost were higher than those of fertilizer at the same low amount of N application, howerer, the opposite effect would draw when the author put in quantity and high nitrogen; Application of vegetable waste water-loggedcompost didn't cause NO3--N obviously changed in the soil, but fertilizers were lead to risk of increase of soil NO3--N content. Therefore, vegetable waste water-loggedcompost can completely replace chemical fertilizers.