Releasing Rule of Available Nutrients in Different Organic Materials
Zheng Fuli
Zhang Bosong
Cui Rongzong
Wei Jianlin
Li Guosheng
Li Yan
Tan Deshui
Abstract：By incubation experiment,we studied the releasing rule of available N,P and K in soybean meal organic fertilizer,fungi residues and sugar residue.The results showed that the releasing rate of mineral nitrogen and available P were 8.04% and 75.96% respectively after the application of soybean meal organic fertilizer in soil for 150 days,but its release rate gradually declined with the extension of incubation time;its releasing rate of available K was 23.44%,and had no obvious correlation with incubation time.Sugar residue could increase the available P and K contents in soil and not be affected by incubation time;its application could inhibit the mineralization of N,so the mineral nitrogen content was always lower than that of CK.Fungi residues also inhibited the mineralization of nitrogen in soil and the mineral N was lower than that of CK during the incubation period;the releasing rate of available K gradually declined with the extension of incubation time,which were 28.31% and 17.34% respectively under the fungi residue Ⅰand Ⅱafter application for 150 days;fungi residue Ⅰ had no effect on available P in soil,while that of fungi residue Ⅱ increased with the extension of incubation time,which was 46.08% at the ending of incubation.
Keywords：Organic materialMineral nitrogenAvailable PAvailable K
Publication Date：2017-08-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：4( 78-81 )