ACTA AGRICULTURAE BOREALI-SINICA ›› 2007, Vol. 22 ›› Issue (3): 88-92. doi: 10.3321/j.issn:1000-7091.2007.03.021

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Regulation on Water Uptake of Different Fall Dormancy Alfalfa Cultivars

WU Xin-wei, HAN Qing-fang, JIA Zhi-kuan   

  1. The Agriculture Research Center in Arid and Semiarid Areas of Northwest Agriculture and Forestry University, Yangling 712100, China
  • Received:2007-03-14 Published:2007-06-28

Abstract: In order to find the regulation on water uptake of 8 different FD alfalfa cultivars, we studied on the relationship of root system, up ground biomass and soil moisture. The results showed that dormancy and semi-dormancy cultivars had the same characteristics in space-time. Water moisture had the decreasing trend with years going. When harvested three times one year, up ground biomass was closely related with water consumption. Both of them were distributing "V". During the bearing time, the most water consumption and the longest growing time were in branching stage, and flowering stage had the fastest water consumption speed. In three years, local roots of alfalfa mainly developed in the top 60 cm of soil and the secondary roots 40 cm while there were no secondary roots bellowing 60 cm of soil. Water uptake of root system of alfalfa mainly occurred from top layer to 120 cm layer of soil.

Key words: Dormancy series, Alfalfa cultivars, Root system, Soil moisture, Water uptake regulation

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Cite this article

WU Xin-wei, HAN Qing-fang, JIA Zhi-kuan. Regulation on Water Uptake of Different Fall Dormancy Alfalfa Cultivars[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2007, 22(3): 88-92. doi: 10.3321/j.issn:1000-7091.2007.03.021.

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