| Effects of crops straw burning on soil organic matter, soil microbes and Mean grain yield |
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| DOI：10.7606/j.issn.1000-7601.2013.02.18 |
| Key Words: crops straw burning soil organic matter soil microbes Mean grain yield |
| Author Name | Affiliation | | LI Ming | College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | WU Faqi | College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | JIANG Bi | College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China | | TIAN Guocheng | College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Topsoil of different straw burning quantity was studied to investigate the effects of straw burning on organic matter and microbe of topsoil, and to discuss the correlations between straw burning quantity and organic matter and microbe of topsoil. Results showed that: (1) effects of straw burning were mainly exerted in the 0～5 cm top soil while only small effects were investigated in the soil depths below 5cm, and straw burning reduced organic matter, fungi, actinomyces, bacteria, corn output and overground biomass in the topsoil by the mean of 10.72%～17.08%, 43.68%～74.43%, 49.32%～74.83%, 58.93%～81.44%, 7.04%～20.63% and 9.23%～18.76% respectively; (2) Straw burning quantity has significantly negative correlations with bacteria, fungi and actinomyces in the topsoil, while has significantly positive correlations with organic matter, corn output and overground biomass in the topsoil. |
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