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草地早熟禾种子产量构成因素的品种差异
孙建华, 王彦荣, 郭玉霞
Variation in seed yield components among varieties of Poa pratensis
SUN Jianhua, WANG Yanrong, GUO Yuxia
应用生态学报 . 2002, (8): 948 -952 .