| Influence of insect-resistant transgenic Bt cotton on Bt protein residue and available nutrient contents in rhizosphere soil |
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| DOI：10.7606/j.issn.1000-7601.2019.03.16 |
| Key Words: transgenic Bt cotton rhizosphere soil Bt protein available nutrients content |
| Author Name | Affiliation | | CHEN Yan-jun | Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, Hainan 570228, China | | REN Meng-yun | Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Institute of Crops and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang 310021, China | | GUAN Xiao | Chinese Research Academy of Environmental Sciences, Beijing 100012, China | | ZHU Wen-juan | Chinese Research Academy of Environmental Sciences, Beijing 100012, China | | SHEN Qi | Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, Hainan 570228, China |
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| Abstract: |
| Here we have detected residues of Bt protein in the rhizosphere soil of four transgenic Bt cottons and non-Bt cottons varieties at different growth stages with ELISA kit, and the changes of available nutrient content were compared at the same time. Results showed that: (1) Bt protein content reached the maximum in squaring stage. In the whole growth period, the Bt protein content in rhizosphere soil of four varieties of transgenic cottons were significantly higher than no-Bt cotton (P<0.05). The Bt protein content of Lumian No.28 was significantly higher than that in the conventional cotton 1 029.66% in squaring stage, the protein of Lumian No.36 was significantly higher than that in the conventional cotton 2 573.45% in squaring stage, Shannong No.8 was significantly higher than conventional cotton 1 028.89% in seeding stage and Xinqiu No.4 was significantly higher than conventional cotton 793.18% in flowering and boll stage. (2) The content of nitrate nitrogen reached the maximum in seeding stage, minimum in boll-opening stage, and transgenic Bt cottons were significantly different from their conventional cottons in many stages. The content of ammonium nitrogen reached the maximum in seeding stage, minimum in boll-opening stage. The four varieties of transgenic cottons were significantly different from their conventional cottons in squaring stage, flowering and boll stage. The contents of available phosphorus reached the minimum in seeding stage, maximum in boll-opening stage. Lumian No.28 was significantly higher than conventional cotton 10.29% in squaring stage, and Lumian No.36 was significantly higher than conventional cotton 6.77% at seeding stage. Results showed that planting and growth period of transgenic Bt cotton were the main factors affecting the residue of Bt protein and the content of available nutrients in the rhizosphere. |
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