|Table of Contents|

Effects of Different Cropping Systems of Soybean on Chernozem Enzyme Activities and Kinetic Parameters(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2008年05期
Page:
795-800
Research Field:
Publishing date:

Info

Title:
Effects of Different Cropping Systems of Soybean on Chernozem Enzyme Activities and Kinetic Parameters
Author(s):
ZHANG Guang-na12CHEN Li-jun1CHEN Zhen-hua12ZHANG Yu-lan12
1Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang,110016,Liaoning:
2Graduate School of Chinese Academy of Sciences,Beijing,100049,China
Keywords:
SoybeanRotationSoybean continuous croppingSoil enzyme activitiesDynamic parameters
PACS:
S154.2
DOI:
10.11861/j.issn.1000-9841.2008.05.0795
Abstract:
Continuous cropping decrease soybean yields.To understand the effects of different cropping systems of soybean on the activities and kinetic parameters of enzymes related to the C,N,P and S transformation in chernozem,surface soil (0-20 cm) samples were collected from the experimental fields under soybean continuous cropping,soybean-maize rotation,and soybean-sorghum rotation in Daqing City of Heilongjiang Province,and the activities of α-and β-galactosidase,α-and β-glucosidase,urease,protease,phosphomonoesterase,phosphodiesterase,and arylsulphatase,as well as the kinetic parameters of β-glucosidase,urease,protease,phosphomonoesterase,phosphodiesterase,and arylsulphatase were measured.The results showed that under soybean-maize rotation,the activities of β-galactosidase,β-glucosidase and protease increased significantly,while arylsulphatase activity had the greatest decrease,compared with those under soybean continuous cropping.Under soybean-sorghum rotation,the activities of all test enzymes except β-galactosidase had no significant differences with those under soybean continuous cropping.Soybean-maize rotation decreased the Km value of β-glucosidase and phosphodiesterase but increased the Vmax value of protease,phosphomonoesterase and arylsulphatase as well as the Vmax/Km ratio of phosphomonoesterase and phosphodiesterase significantly,while soybean-sorghum rotation decreased the Km value of urease but increased the Vmax/Km ratio of urease and arylsulphatase significantly.Compared with other two cropping systems soybean-maize rotation can increase soil enzyme activity better.

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Last Update: 2014-10-06