ÃÞ »¨ ѧ ±¨ Cotton Science 2009£¬21(5)£º383-387
Effects of Transgenic Cotton Planting on Four Kinds of Soil Enzyme Activity Abstract£ºThe effects of transgenic Bt and Bt+CpTI cottons on soil enzyme activity in different stages were study under the greenhouse experiment condition. The results showed that from the seeding stage to the flower and boll stage, the activities of soil urease £¬ polyphenoloxidase, acid phosphatase and alkaline phosphatase increased at first and then decreased. However, the activities of protease and the neutral phosphatase decreased at first and then increased.As for the same variety between the two neighboring stages of duration, the differences of the soil urease, protease, acid phosphatase and neutral phosphatase activities have reached the great remarkable level(P<0.01).Compared with non-transgenic cotton £¬ the planting of transgenic cotton GK12 had a decrease of soil urease activity(23.06%) and a decrease of soil acid phosphatase activity(10.89%). The Bt+CpTI cotton sGK321 also decreased the enzyme activity. The transgenic Bt+CpTI cotton sGK321 caused a fewer disturbances on soil biological activities: compared with its parent non-transgenic cotton, it had an extremely significant effects on the activities of soil urease, protease, acid phosphatase and neutral phosphatase.
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