Journal of Food, Agriculture and Environment

Effects of rotten wheat straw on organic carbon and microbial biomass carbon of tobacco-planted soil 

Author(s):

Hong-li Chen, Guo-shun Liu *, Yong-feng Yang, Yi-mei Chang, Ling-ling Zhao

Recieved Date: 2012-09-11, Accepted Date: 2013-01-19

Abstract:

The effects of rotten wheat straw on organic carbon content and microbial biomass carbon content of tobacco-planted soil were studied in this paper. Six treatments (CK0T1 3000, T2 6000, T3 9000, T4 12,000 and T5 15,000 kg·hm^-2) were applied on a plot experiment. The results showed that the amount of rotten wheat straw could effectively affect the content of organic carbon, microbial biomass carbon and microbial quotient of tobacco- planted soil. The larger the amount of rotten wheat straw, the higher organic carbon content increased. The difference between treatments was obvious in early stage, and then the difference narrowed down. Microbial biomass carbon content of all treatments was higher than CK. A peak appeared in 75d and the contents of T1, T2, T3, T4 and T5 were increased by 80.99%,  93.99%, 101.95%, 119.64% and 111.25%, respectively. Soil microbial quotient was also analyzed in tobacco whole growth period. The average of microbial quotient of CK, T1, T2, T3, T4 and  T5 was 4.53%, 5.78%, 5.82%,5.96%, 5.95% and 5.84%, respectively. The correlation between microbial biomass carbon content and organic carbon content and microbial quotient were analyzed. There were significant correlations between microbial biomass carbon content, organic carbon content and microbial quotient, the correlation coefficients were 0.560 and 0.870. In conclusion, the best effect of improving tobacco-planted soil fertility was by adding 12,000 kg·hm^-2 of rotten wheat straw. 

Keywords:

Rotten wheat straw, organic carbon, microbial biomass carbon, microbial quotient, tobacco-planted soil

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 1
Category: Environment
Pages: 1017-1021

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