| Effects of biochar application amount on microbial flora and soil enzyme activities in sandy soil of Xinjiang |
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| DOI：10.7606/j.issn.1000-7601.2016.04.34 |
| Key Words: biochar microbial flora soil enzyme sandy soil |
| Author Name | Affiliation | | GU Mei-ying | Institute of Microbiology, Xinjiang Academy of Agricultural Sciences/Xinjiang Laboratory of Special Environmental Microbiology Key Laboratory of Nutrient and Water Resources Efficient Utilization of Oasis, Urumqi, Xinjiang 830091 China | | GE Chun-hui | Institute of Soil and Fertilizer and Agricultural Sparing Water, Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China | | MA Hai-gang | Institute of Soil and Fertilizer and Agricultural Sparing Water, Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China | | TANG Guang-mu | Institute of Soil and Fertilizer and Agricultural Sparing Water, Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China | | ZHANG Zhi-dong | Institute of Microbiology, Xinjiang Academy of Agricultural Sciences/Xinjiang Laboratory of Special Environmental Microbiology Key Laboratory of Nutrient and Water Resources Efficient Utilization of Oasis, Urumqi, Xinjiang 830091 China | | XU Wan-li | Institute of Soil and Fertilizer and Agricultural Sparing Water, Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China |
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| Abstract: |
| In order to assess the potential of biochar application to sandy soil, a two-year bean-wheat rotation plot field experiment was conducted in Hetian, Xinjiang Province. Through analyzing the amount of soil culturable microorganisms, the number of bacterial physiological groups and soil enzyme activities, and the influence of difference biochar application amount on sandy soil microbial flora and soil enzyme were studied. The experiment was designed to have five treatments in biochar application rates, including 0 kg·hm-2 (CK), 22 500 kg·hm-2, 67 500 kg·hm-2, 112 500 kg·hm-2 and 225 000 kg·hm-2 of biochar application. Results showed that application of 22 500～67 500 kg·hm-2 biochar could significantly improve content of OM, available P, and available K. In addition, the number of bacteria and actinomycetes by applications of different amounts of biochar soils were increased first and then became decreased. The number of bacteria with application of 67 500 kg·hm-2 biochar was increased by 63.83%. The number of actinomycetes with application of 22 500 kg·hm-2 biochar was increased by 250.00%. The number of fungi was decreased first and then increased. The number of fungi with application of 67 500 kg·hm-2 biochar was decreased by 71.43%. Furthermore, the numbers of cytophaga and azotobacter with applications of different amounts of biochar soils were increased first and then decreased. The number of bacteria with application of 112500 kg·hm-2 biochar was increased by 211.11% and 1 057.89%, respectively. Also, invertase, catalase and protease activities with applications of 67 500～112 500 kg·hm-2 biochar were the highest. Correlation analysis also showed that soil nutrition and bacteria, nitrifying bacteria, denitrifying bacteria, soil enzyme activities (except for phosphatase) were related closely. The results showed that biochar at 67 500 kg·hm-2 caused the greatest effects in increasing soil nutrient contents, improving the number of microbial community and enhancing soil enzyme activities supply in sandy soil. |
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