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《Acta Agrestia Sinica》 2007-04
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Effects of Grazing Intensity on Reproductive Characteristics of Artemisia frigida Willd. in Stipa breviflora Griseb. Steppe

DU Li-xia1,LI Qing-feng2,DONG Kuan-hu1(1.College of Animal Science and Technology,Shanxi Agricultural University,Taigu,Shanxi Province 030801,China;2.College of Ecology and Environmental Science,Inner Mongolia Agricultural University,Huhhot,Inner Mongolia Autonomous Region 010018,China)  
This paper investigated the reproductive characteristics of Artemisia frigida Willd.from the aspects of both seed propagation and vegetative propagation under different grazing intensities in Stipa breviflora Griseb.steppe.The main research results are as follows: Seed production of A.frigida was high in light grazing and no-grazing plot and not observed under heavy grazing.The vegetative reproduction of A.frigida was accelerated by light grazing and the performances of all vegetative propagation components were better than other treatments.It seemed to be a strategy of A.frigida to increase the biomass allocation to underground while decrease the aboveground part under grazing conditions.With the increase of grazing intensity,the reproductive pattern of A.frigida changed from coexistence of seed propagation and vegetative propagation to vegetative propagation alone.
【Fund】: 中国农业科学院草原研究所重点实验室项目
【CateGory Index】: S548
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