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cje ›› 2005, Vol. ›› Issue (8): 867-871.

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Effects of Cistanche deserticola inoculation on undergrowth vegetation of natural Haloxylon ammodendron forest

GUO Quanshui1, TAN Deyuan2, WANG Chunling3, SHI Zuomin1, MA Chao1   

  1. 1. Research Institute of Forestry Ecological Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China;
    2. College of Bioscience and Biotechnology, Beijing Forestry University, Beijing 100083, China;
    3. Department of Wildlife Protection, State Forestry Administration, Beijing 100043, China
  • Received:2004-09-05 Revised:2004-11-26 Online:2005-08-10

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Abstract: In this paper,the effects of Cistanche deserticola inoculation on the undergrowth vegetation of natural H.ammodendron forest were studied in low-lying land,slow and gentle desert,and semi-mobile dune,the three different habitats of natural H.ammodendron forest at the eastern edge of Zhunger Basin in Xinjiang Autonomous Region,.The results showed that C.deserticola inoculation had different effects on the vegetation composition,plant number,vegetation coverage,species diversity,biomass,and naturally regenerated sapling under natural H.ammodendron forest.In the natural H.ammodendron forest in low-lying land,the amount of lost vegetation was 41 000 ind·hm-2,accounting for 18% of total undergrowth vegetation before inoculation,the loss of biomass was 35.64 kg·hm-2,accounting for 14.9% of the total,and the amount of lost sapling was 1320 ind·hm-2,accounting for 24.2% of the total.In the natural H.ammodendron forest in slow and gentle desert,the loss of plant individuals under the forest was 26000 ind·hm-2,accounting for 49% of total amount of undergrowth vegetation before inoculation,the loss of biomass was 39.87 kg·hm-2,accounting for 19.0% of the total,and the amount of lost sapling was 345 ind·hm-2,accounting for 18.8% of the total.In the natural H.ammodendron forest in semi-mobile dune,the loss of plant individuals under the forest was 2000 ind·hm-2,accounting for 5% of total number of plants before the inoculation,the loss of biomass was 9.98 kg·hm-2,accounting for 6.0% of the total,and the amount of lost regenerated H.ammodendron sapling was 256 ind·hm-2,accounting for 3.8% of the total.In the survey quadrate directly influenced by inoculation,the number of plants was reduced by 26%～53%,overall vegetation coverage reduced by 46%～52%,species diversity decreased by 5%～13%,biological advantage increased by 2%～6%,naturally regenerated H.ammodendron sapling reduced by 40%～75%,and biomass loss of aerial and ground parts under the forest lost by 25.2%～55.7%.

Key words: Bt(Bacillus thuringiensis)gene, Rice, Soil enzymes

CLC Number: