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| Effects of residual mulching film on soil nematode community structure in cotton fields |
| Received:June 18, 2024 |
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| KeyWord:residual mulching film;soil nematodes;biological diversity;arid areas;cotton |
| Author Name | Affiliation | E-mail | | MA Jiayu | College of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052, China | | | GU Linzhu | College of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052, China | | | WU Chengcheng | College of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052, China | | | JIANG Mengke | College of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052, China | | | LI Yan | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China | | | ZHU Xinping | College of Bioscience and Resources Environment, Beijing University of Agriculture, Beijing 102206, China | zhuxinping1978@163.com | | YANG Zhiying | Institute of Soil Fertilizer and Agricultural Water Saving, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | | WANG Xihe | Institute of Soil Fertilizer and Agricultural Water Saving, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | | JIA Hongtao | College of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052, China
Xinjiang Key Laboratory of Soil and Plant Ecological Process, Urumqi 830052, China | jht@xjau.edu.cn |
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| Abstract: |
| In this study, in order to identify the influence of different residual mulching film accumulations on the soil nematode community structure in cotton fields and to determine the suitable range of residual mulching film for cotton planting, a randomized block design with setting up six residual film addition treatments was adopted under the same standardized planting conditions and management model. They are CK（without mulch）, T1（250 kg·hm-2）, T2（500 kg·hm-2）, T3（1 000 kg·hm-2）, T4（1 500 kg·hm-2）and T5（2 000 kg·hm-2）. During the period of opening of cotton bolls, soil samples at a depth of 0-20 cm were extracted from the tillage layer to analyze the effect of mulch film residues on the basic soil properties and soil nematodes in cotton fields. It was found that：with the increase of the amount of residual mulching film, organic matter content, pH value and moisture content of soil showed a decreasing trend; Acrobeloides is the dominant algae in each treatment with an abundance of 12.57% - 16.59%; The main trophic groups of nematodes are bacterivores and plant-parasites, where the relative abundance of bacteria-eating nematodes decreases with the increase of residual mulching film. Wasilewska index（WI） of nematodes showed a significant downward trend with the increase of residual nematode; Individual density of soil nematodes showed a very significant positive correlation with alkali-hydrolyzale nitrogen（P<0.01）, while it is in extreme significant negative correlation with available phosphorus and available kalium（P<0.01）and significant negative correlation with electrical conductivity（P<0.05）; Organic matter content and quick-acting nutrients of soil are main environmental factors that regulate the dynamic changes in soil nematode community structure. Research has indicated that the incorporation of leftover film results in a decrease in soil pH, a reduction in organic matter content, and an increase in nutrient loss. Additionally, it hurts the soil nematode population, as it diminishes nematode variety and abundance while augmenting the number of detrimental nematodes. When the amount of residual film exceeds 500 kg·hm-2, soil health drastically declines. Therefore, to effectively maintain soil health, the residual mulching film in cotton fields in Xinjiang should be controlled below this level. |
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