The aboveground biomass and soil water content and their correlation for alfalfa in Yangling area was studied with Guanzhong alfalfa as material.The plant height and forage yield in alfalfa at 3 year ages had very significantly positive correlation.When clipping at stage of full bloom stage the fresh yield was 40 970 kg/hm2.The aboveground biomass was highest in 1st cut,.WUE was highest in the 2nd cut and lowest in the 3rd cut.The water changes in 0~2 m soil layer during alfalfa growth stage was related wit...
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