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cje ›› 2003, Vol. ›› Issue (6): 38-42.

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Ecological role of weeds conserved in orchard in red soil hilly area during hot-dry season

CHEN Xin, TANG Jianjun, FANG zhiguo, FAN Xinghai   

  1. Life Science School, Zhejiang University, Hangzhou 310029, China
  • Received:2001-09-12 Revised:2001-11-07 Online:2003-12-10

Abstract: A study on ecological role of weeds conserved in orchard was conducted in the red soil hilly area of southern China during 1998~2001. Compared with the plots covered with weeds(no weeding, mowing and weed strip), a marked increase in soil temperature and a reduction in soil moisture, microbial biomass C, activity of phosphorus solubilizing microorganisms and VAMF spore numbers were recorded in the plots weeded by hand and herbicide during the hot-dry season. No significant difference in soil temperature, microbial biomass C, activity of phosphorus solubilization microorganism and VAMF spore numbers was found among the three methods of weeds conserved. In the no weedy plot the growth of young trees were influenced by weeds because the higher weed species competed with young trees for light. It was suggested that mowing and weed strip were better ways to conserve weeds in orchards of hilly area.

Key words: Striped flea beetle, Phyllotreta striolata(F), Azadirachtin, Ecological control, Deterrent effect, Insect pests accumulated damage amount

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