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- Title
生物质调理剂对川西北高寒草地沙化土壤养分 和微生物群落特征的影响.
- Authors
宋佳珅; 张晓丽; 孔凡磊; 刘晓林; 安文静; 李玉义
- Abstract
Biomass conditioner made from agricultural and animal husbandry waste for resource disposal could be used to improve desertified soil, which is one of the effective ways of ecological management on desertified grasslands in northwest Sichuan. To clarify the effects of different raw material conditioners on alpine desertified grassland in north west Sichuan, we analyzed the effects of three conditioners on soil nutrients and microbial community characteristics. With no conditioner as the control ( CK), three different biomass conditioners were set up with an application rate of 12 L • hm-2, including mushroom dregs ( JZ), straw (JG) and biochar ( SWT). The results showed that all biomass conditioners could significantly increased soil available nutrients and active organic carbon by 23.0%-521.6%. Among the three conditioners, JG had the best effect, with an improve only applied in the first year, soil available nutrients and active organic carbon in the second year decreased by 4.5%-92.3% compared with that of the first year, while soil organic carbon and microbial biomass carbon content of the and year increased by 5.6%-458.0%. The biomass conditioners changed the relative abundance of the dominant bacteria in the microbial community. JC significantly affected bacterial flora, while JG and JZ. affected fungal flora. Compared with CK, JG significantly reduced the diversity of soil bacteria and fungi. The Shannon index was decreased by 2.9% and 31.3%, while the Simpson index was increased by 175.0% and 320.9%, respectively, Results of the redundancy analysis showed that the contents of soil available nutrients and active organic carbon were important factors affecting microbial unity composition. The contents of soil nitrate and microbial biomass carbon had great impacts on bacterial community composition, explaining 65.9% of community variations. The contents of soil available potassium and microbial community variation. According to the comprehensive comparison, straw conditioner ad significantly incense soil available nutrients and active organic carton, and benefit the growth of beneficial bacteria and fungi, which could be used as a promotion measure to improve soil quality of alpine desertified grand in northwest Sichuan.
- Subjects
SICHUAN Sheng (China); MOUNTAIN soils; SOIL conditioners; ANIMAL waste; SOIL microbiology; BACTERIAL communities; GRASSLAND soils; SOIL microbial ecology
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2021, Vol 32, Issue 6, p2217
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/J.1001-9332.202106.036