Effects of Straw Returning on Soil Microorganism and Soil Respiration Rate in Cotton Field
Li Jinpu
Wang Shuanglei
Zhang Meiling
Nie Junjun
Liu Yanhui
Song Xianliang
Sun Xuezhen
Abstract：The effects of cotton straw returning on soil microbial biomass C , soil microbial activity and soil respiration rate were studied with substrate induced respiration and CO 2 emission amount methods .The re-sults showed that the cotton straw returning improved the content of soil microbial biomass C .The content of soil microbial biomass C of different years and different soil layers had different variation trends .In two-year experimental results , the microbial biomass C content of cotton straw returning were significantly higher than those of control in 0~20 cm soil layer except for August and September in 2012 and 20~40 cm soil layer ex-cept for August in 2013 , while there was no significant difference between cotton straw returning and control in 40~60 cm soil layer .The soil microbial activity of cotton straw returning were significantly higher than those of control except for April and September in 2013 in 20~40 cm soil layer and May and August in 2013 in 40~60 cm soil layer .The cotton straw returning also improved the soil respiration rate .The soil respiration rate of cotton straw returning were significantly higher than those of control except for September in 2012 and June in 2013 in 20~40 cm soil layer and June in 2012 and May in 2013 in 40~60 cm soil layer .
Keywords：CottonStraw returningSoil microorganismBiomass CSoil respiration rate
Publication Date：2014-09-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 69-73 )