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《Acta Prataculturae Sinica》 2009-03
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Influence of urea application on aboveground biomass and important value of the species in the degraded grassland

HE Dan1,LI Xiang-lin1,WAN Li-qiang1,HE Feng1,LI Chun-rong2(1.Institute of Animal Science,CAAS,Beijing 100094,China;2.Beijing Forestry University,Beijing 100094,China)  
When different amounts of urea were applied to improve the degraded grassland,different species responded differently to the different concentrations.Fifty kg/ha of urea was the best concentration for increasing productivity and importance of Leymus chinensis in the grassland community,while 75 kg/ha was optimum for Phlomis tuberosa and 100 kg/ha for Potentilla acaulis.This shows that different concentrations of urea may be used to give some limited control of the structure of the degraded grassland plant community.
【Fund】: 公益性行业(农业)科研专项(nyhyzx07-022);; 国家科技支撑计划(2006BAD16B05)资助
【CateGory Index】: S812.4
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