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《Hubei Agricultural Sciences》 2005-02
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Effects of Simulated Canopy Shade on Seed Germination and Seedlings Growth of Spartina alterniflora and Scirpus mariqueter

CHEN Zhong-yi1, GAO Hui2, WU Han2, LI Bo2(1. College of Gardening and Horticulture, Yangtze University, Jingzhou Hubei 434025,China; 2. Institute of Biodiversity Science, Fudan University, Shanghai 200433,China)  
By simulated canopy shade with green filter,the seed germination rate and seedling growth of introduced Spartina alterniflora and native Scirpus mariqueter were studied.The results obtained here show that simulated canopy shade didn't influence the seed germination rate of S. alterniflora,but significantly decreased that of S. mariqueter. The shoot dry weight,total dry weight and relative growth rate of S.alterniflora and S. mariqueter was significantly lower in simulated canopy shade than that in control treatment respectively,and their shoot height was inversed.In particular,the reduced extent of relative growth rate of S. mariqueter was obviously greater than that of S. alterniflora in simulated canopy shade. This indicated that vegetation canopy shade could strongly restrain the seedlings recruitment and growth of S. mariqueter. Further,the competition displacement mechanism of S. mariqueter population by S. alterniflora might partly be explained from these experiment results in the Yangtze River estuary.
【Fund】: 国家自然科学基金资助项目(30370235)
【CateGory Index】: Q948.1
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