| Effects of different coating years on soil quality of cotton field in Manase County |
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| DOI：10.7606/j.issn.1000-7601.2022.06.21 |
| Key Words: film coating for continuous years soil physical and chemical properties soil enzyme activity soil quality |
| Author Name | Affiliation | | GOU Yanru | School of Resources and Environment, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | YANG Jingjing | Shihezi Institute of Agricultural Sciences, Shihezi, Xinjiang 532000, China | | CHAI Qiang | People’s Government of Lanzhou Bay Town, Manas County, Xinjiang, Manas, Xinjiang 832200, China | | TANG Qingfeng | Institute of Analysis and Testing of Beijing Institute of Science and Technology (Beijing Physical and Chemical Analysis and Testing Center), Beijing 100089, China | | YAN Han | School of Resources and Environment, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | HU Yang | School of Resources and Environment, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | DENG Pengfei | School of Resources and Environment, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | SUN Xia | School of Resources and Environment, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China
Key Laboratory of Soil and Plant Ecological Process, Xinjiang, Urumqi, Xinjiang 830052, China | | JIA Hongtao | School of Resources and Environment, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China
Key Laboratory of Soil and Plant Ecological Process, Xinjiang, Urumqi, Xinjiang 830052, China |
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| Abstract: |
| The purpose of this study was to examine the effects of different coating years on soil properties and enzyme activity. In April 2021, the cotton fields of 0~10, 10~20 cm and 20~30 cm in Manas County were selected as study sites. The soil physical and chemical properties, soil enzyme activity, soil microbial carbon and nitrogen content were determined, and the soil quality of cotton fields in Manas County with different film mulching years were comprehensively evaluated. The results showed that: (1) With the increase of film coating continuous years, soil water content and organic matter content were gradually increased, reaching the highest levels of 52% and 21.60 g·kg-1 with film coating for 30 years. Soil fast\|acting phosphorus increased first before decreasing, and the highest content was with film coating for 10 years, reaching 49.60 mg·kg-1. Soil conductivity, total salt, quick\|acting potassium, alkaline nitrogen had a decrease trend with film coating for 30 years. They were 0.50 mS·cm-1, 0.69 g·kg-1, 148.28 mg·kg-1, and 25.27 mg·kg-1 respectively. During the same period of film coating, with the increased depth of the soil layer, soil water content, conductivity, total salt gradually increased, and pH, organic matter, quick phosphorus, quick potassium, alkaline nitrogen gradually decreased. (2) Under the different years of film coating, soil sucrase, urease and alkaline phosphatase decreased with the increase of the film coating years, reaching the highest content with the coating for 10 years with 10.57 mg·g-1·d-1,0.86 mg·g-1·d-1, and 0.46 mg·g-1·d-1 respectively. Soil catalase increased significantly with different coating years, ranging from 1.80 to 2.20 mL·g-1, At the same period of coating years, except that sucrase content was greater than 10~20 cm, the soil enzyme activity was greater than surface soil and significantly different in deep soil. With the increase of the years of film coating, the soil microbial biomass carbon content increased first and then decreased with the highest 205.26 mg·kg-1, and the microbial biomass nitrogen content gradually decreased with the lowest 11.40 mg·kg-1 under the coating for 30 years. The soil microbial biomass carbon and nitrogen performance were higher than the deep layer. (3) Fast\|acting phosphorus had a very significant positive correlation with the micro biomass carbon of catalase, urease, alkaline phosphatase, and sucrase, indicating that soil fast\|acting phosphorus was the main factor affecting soil enzyme activity and microbial biomass carbon and nitrogen. Comprehensive evaluation of soil quality showed optimal soil quality under 10-year film coating and relatively low soil quality under 0 and 30-year film coating. |
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