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| Effects of continuous cropping with plastic film mulching on soil nematode communities structure in cotton fields |
| Received:September 20, 2024 |
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| KeyWord:continuous cropping with plastic film mulching;soil nematodes;community structure diversity;ecological index |
| Author Name | Affiliation | | ZHU Xinping | College of Bioscience and Resources Environment, Beijing University of Agriculture, Beijing 102206, China
Key Laboratory for North China Urban Agriculture of Ministry of Agriculture and Rural Affairs, Beijing 102206, China | | JIA Yuanbin | College of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052, China | | CHEN Kangyi | College of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052, China
The Second Geological Brigade, Hebei Bureau of Geology and Mineral Exploration and Development, Tangshan 063000, China | | SHUI Yan | College of Bioscience and Resources Environment, Beijing University of Agriculture, Beijing 102206, China | | LIU Wenyi | College of Bioscience and Resources Environment, Beijing University of Agriculture, Beijing 102206, China | | GOU Yanru | College of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052, China
Research Institute of Soil, Fertilizer and Agricultural Water Conservation, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | JIA Hongtao | College of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052, China |
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| Abstract: |
| To reveal the effects of continuous cropping with plastic film mulching on soil nematode communities structure in cotton fields, soil samples were collected at 0, 5, 10, 20, and 30 years from Lanzhou Bay Town, Manas County, Xinjiang. The soil′ s physicochemical properties were analyzed, and soil nematodes were isolated and identified. The results showed that with the increasing of continuous cropping with plastic film mulching years, soil pH significantly decreased, the content of soil organic matter significantly increased, and soil available potassium content significantly decreased. Helicotylenchus was the dominant genus with 39.31% - 69.87% abundance in the composition of soil nematode communities. The main nutritional groups of soil nematode were plant parasites and bacterivores. In the first 5 years of converting wasteland into farmland, the abundance of plant parasitic nematodes in the soil decreased, and then gradually increased with the extension of continuous cropping years. The abundance of plant parasites nematodes reaches its highest point of 74.38% in the 30th year of continuous cropping years; however, bacterivorous nematodes showed an opposite trend, reaching their lowest point of 19.90% in the 30th year of continuous cropping. Compared to the abundance of Helicotylenchus nematodes in uncultivated wasteland（0 years）and soil with continuous cropping for 5 years, the abundance of Helicotylenchus nematodes in soil with continuous cropping for 30 years increased by 56.98% and 56.19%, respectively. Soil available potassium content, soil pH, soil organic matter content and soil water content were the main environmental factors affecting the composition of nematode community structure. The nutritional groups of nematodes were closely related to soil organic matter, Maturity index of free-living nematodes（MI）, and Nematode channel ratio（NCR）. Soil organic matter content was mainly decomposed through bacterial pathways. The soil environment in the wasteland was strongly disturbed by the continuous cropping measures of mulching, which had a significant impact on the community structure of soil nematodes in the fifth year. With the increase of continuous mulching years, the soil food web gradually formed, and the structured and strengthened food web gradually stabilized and matured. From the above, it could be concluded that the changes in soil nematode communities and nutritional groups could be well applied to evaluate the disturbance of long-term mulching continuous cropping measures on soil health in farmland. This study contributed to a more comprehensive understanding of the impact of mulching continuous cropping on soil health in cotton planting in Xinjiang. |
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