|
| Effect of transgenic cotton SGK321 with different amounts of straw on soil nematode communities |
| Received:August 13, 2018 |
| View Full Text View/Add Comment Download reader |
| KeyWord:transgenic(Bt+CpTI)cotton;straw returning amount;soil nematode;trophic groups;ecological index |
| Author Name | Affiliation | E-mail | | LI Jing | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs
Key Laboratory of Original Agro-Environmental Quality of Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environmental and Agro-product Safety, Tianjin 300191, China | | | CAI Lian-he | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs
Key Laboratory of Original Agro-Environmental Quality of Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environmental and Agro-product Safety, Tianjin 300191, China | | | LIU Rui-hua | Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China | | | FENG Chun | Hohhot Ninth Middle School, Hohhot 010000, China | | | LI Gang | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs
Key Laboratory of Original Agro-Environmental Quality of Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environmental and Agro-product Safety, Tianjin 300191, China | | | YANG Dian-lin | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs
Key Laboratory of Original Agro-Environmental Quality of Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environmental and Agro-product Safety, Tianjin 300191, China | | | ZHAO Jian-ning | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs
Key Laboratory of Original Agro-Environmental Quality of Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environmental and Agro-product Safety, Tianjin 300191, China | zhaojn2008@163.com |
|
| Hits: 2388 |
| Download times: 3189 |
| Abstract: |
| In order to better monitor the impact of transgenic crop straw returning on soil ecosystems, we carried on the plot experiment to study the effects of different transgenic (Bt+CpTI) cotton straws on soil nematode density, diversity and community stucture. We used the transgenic (Bt+CpTI) cotton SGK321 and non-transgenic parental cotton Shiyuan 321,with five straw-returning amount, which was set as control (0), half-returning (1.0 g·kg-1), total returning (2.0 g·kg-1), 1.5 times returning (3.0 g·kg-1) and 2 times returning (4.0 g·kg-1). Soil samples were collected at budding stage and flowering and boll-forming stages for identification of nematodes. The results showed that there was no significant difference in soil nematode density between these two cotton varieties without straw return. After the returning of straw, the density of soil nematode in SGK321 was significantly higher than that in non-transgenic cotton under the treatment of 1.5 times returning at bud stage, but no significant difference was observed in other treatments at both stages. A total of 34 nematode genera were identified in the soil of transgenic (Bt+CpTI) cotton SGK321, including 13 genera of Bacterivores, 3 genera of Fungivores, 11 genera of Plant-parasitic nematodes and 7 genera of Omnivores-predators. Also 37 genera were present in the soil of non-transgenic cotton, including 13 genera of Bacterivores, 3 genera of Fungivores, 12 genera of Plant-parasitic nematodes and 9 genera of Omnivores-predators. Straw returning increased the abundance of Bacterivores, yet the amount of straw returning with more than 3.0 g·kg-1 would inhibit the growth and abundance of herbivorous nematodes. This study showed that the planting of transgenic (Bt+CpTI) cotton did not change the nutritional group, and the ecological index analysis indicated that there was no significant difference in soil nematodes in terms of Shannon-Wiener Index (H') and Nematode Channel Ratio (NCR) between these two cotton varieties under different treatments. Overall, the amount of straw returning to the field, can increase the abundance of soil nematodes. Multivariate analysis showed that the cotton growth period and the amount of straw returning to field had much more significant effect on the nematode community than the cotton variety. |
|
|
|
