Degradation and its affecting factors of NBPT in soil

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Degradation and its affecting factors of NBPT in soil

LI Tao^1,2; SHI Yuanliang¹; LI Xuewen³; LIN Guolin³

¹Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;²Graduate University of Chinese Academy of Sciences, Beijing 100039, China; ³College of Land and Environment, Shenyang Agricultural University, Shenyang 110161, China

Received:2005-12-29 Revised:2006-05-07 Online:2006-09-10 Published:2006-09-10

Abstract

Abstract: The incubation test showed that the half-life of NBPT was 7.2～7.6 d in non-sterilized soil, and 22.4 d in sterilized soil. When the temperature was raised from 20 ℃ to 30 ℃, the degradation rate enhanced slightly, and the half-life was shorted from 7.6 d to 6.5 d. Light intensity also had some influence on the degradation of NBPT, with the half-life of 4.5 d and 5.9 d in dark and light, respectively. Microorganism was the critical factor of NBPT depletion in soil. Environmental factors favorable for microbial growth, such as acid soil, could also enhance the degradation of NBPT in soil. Glucose could inhibit the degradation of NBPT, because it could increase soil aggregation, and thus, increase the adsorption of NBPT by soil.

Key words: Canopy gap, Edge of forest, Woody wall, Thermal active surface, Surface temperature

LI Tao^1,2; SHI Yuanliang¹; LI Xuewen³; LIN Guolin³. Degradation and its affecting factors of NBPT in soil[J]. cje.

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