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| Effects of different straw returning methods on soil nematode community characteristics |
| Received:May 22, 2020 |
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| KeyWord:straw returning;nematode;community structure;soil nutrient |
| Author Name | Affiliation | E-mail | | RAO Ji-xiang | School of Resources and Environment, Anhui University, Hefei 230601, China | | | CHEN Hao | School of Resources and Environment, Anhui University, Hefei 230601, China | | | WU Xing-guo | School of Resources and Environment, Anhui University, Hefei 230601, China | | | HU Sen-qi | Suzhou Academy of Agricultural Sciences, Anhui Suzhou 234099, China | | | SUN Qing-ye | School of Resources and Environment, Anhui University, Hefei 230601, China | sunqingye@ahu.edu.cn |
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| Abstract: |
| This study examined the effects of straw return-to-field treatment in different modes on the number, genera, and community structure of soil nematodes and the related ecological index. Field experiments were divided into seven groups, as follows:A(wheat straw fully returned to field + corn straw not returned to field), B(corn straw fully returned to field + wheat straw not returned to field), C(wheat straw fully returned to field + straw cones fully returned to field), D(fertilization + wheat and corn straw not returned to field), E(50% wheat straw returned to field + corn straw not returned to field), F(50% corn straw returned to field + wheat straw not returned to field), and G(non-fertilization + wheat and corn straw not returned to field). The results showed that the amount of total nitrogen, total phosphorus, and organic matter increased in the straw return-to-field groups; a total of 36 genera of nematodes were identified in 7 groups including 15 genera of bacterial-feeding nematodes, 5 genera of fungal-feeding nematodes, 9 genera of plant parasitic nematodes, and 7 genera of omnivorous nematodes. Furthermore, the total number and diversity, richness, and Wasilewska indices of nematodes - and the number of fungal-feeding and omnivorous species thereof-increased in the straw return-to-field groups compared with the group G; this was particularly true in group E, which had the highest index values. The study indicates that straw return-to-field techniques contribute to the accumulation of soil nutrients, increases the number and diversity of soil nematodes, and improves the anti-interference ability of soil. |
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