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[Effect of Bt rice straw returning in soil on the growth and reproduction of Eisenia fetida.]
- Source :
-
Ying yong sheng tai xue bao = The journal of applied ecology [Ying Yong Sheng Tai Xue Bao] 2016 Nov 18; Vol. 27 (11), pp. 3667-3674. - Publication Year :
- 2016
-
Abstract
- Bacillus thuringiensis (Bt) protein can enter the soil through Bt crops straw returning to field, which may affect the growth and reproduction of soil animals, such as earthworms. Here, Bt rice (b2B138) and conventional rice (Anfeng A) straw were returned in soil to evaluate the impact of Bt rice on Eisenia fetida. Two varieties of rice straw were added into soil to breed E. fetida at the rates of 2.5%, 5%, 7.5% and 10%. The survival rate, relative growth rate, reproduction of earthworm, the Cry1Ab content in soil-straw mixture and earthworm were detected after 7, 15, 30, 45, 60, 75, 90 d. The results showed that Bt rice straw returning at higher concentrations (7.5% and 10%) inhibited the survival rate of E. fetida. Bt rice straw returning had no adverse effect on relative growth rate (RGR) of E. fetida. Bt rice straw treatment improved the reproduction of earthworms under 5%, 7.5% and 10% straw returning in soil. Enzyme-linked immunosorbent assay (ELISA) results indicated that immunoreactive Cry1Ab was detectable in soil-straw mixture and E. fetida from Bt rice treatments, and a strong decline was observed in soil-straw mixture with the increase of treated time. Therefore, Cry1Ab released from Bt rice straw returning at 2.5% and 5% concentration had no adverse effects on the growth and reproduction of E. fetida.
- Subjects :
- Animals
Bacillus thuringiensis
Bacillus thuringiensis Toxins
Bacterial Proteins isolation & purification
Crops, Agricultural
Endotoxins isolation & purification
Hemolysin Proteins isolation & purification
Plant Stems
Plants, Genetically Modified
Reproduction
Oligochaeta growth & development
Oryza
Soil
Subjects
Details
- Language :
- Chinese
- ISSN :
- 1001-9332
- Volume :
- 27
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- Ying yong sheng tai xue bao = The journal of applied ecology
- Publication Type :
- Academic Journal
- Accession number :
- 29696866
- Full Text :
- https://doi.org/10.13287/j.1001-9332.201611.009