Effects of the Alternatively Interspaced Furrow Irrigation on Maize Root Distribution and Grain Yield, and Its Water-saving Benefits  

作　　者：LIANG Zong-suo KANG Shao-zhong SHAO Min-gan DENG Xi-ping PAN Yin-ghua 

机构地区：[1]Institute of Soil and Water Conservancy, China Academy of Science and Ministry of Water Resources, Yangling , Shaanxi 712100 [2]Institute of Agricultural Soil and Water Engineering, Northwest Science and Technology University of Agriculture and Forestry, Yan Institute of Soil and Water Conservancy, China Academy of Science and Ministry of Water Resources, Yangling , Shaanxi 712100 [3]Institute of Agricultural Soil and Water Engineering, Northwest Science and Technology University of Agriculture and Forestry, Yan Institute of Soil and Water Conservancy, China Academy of Science and Ministry of Water Resources, Yangling , Shaanxi 712100 Institute of Soil and Water Conservancy, China Academy of Science and Ministry of Water Resources, Yangling , Shaanxi 712100 Institute of Soil and Water Conservancy, China Academy of Science and Ministry of Water Resources, Yangling , Shaanxi 712100

出　　处：《Agricultural Sciences in China》2001年第1期116-122,共7页中国农业科学（英文版）

基　　金：国家重点基础研究发展计划(973计划)，Chinese National Young Scientist Fund

摘　　要：A test of three types of irrigation was carried out in the oasis area of the arid region in Minqin County for the study of the effects of the controllable alternatively root-partitioned irrigation (CARI) on corn ( Zea mays L. ) growth, root distribution, and the water-saving benefits. The research results showed that the alternatively interspaced furrow irrigation (AIFI) could significantly increase the water use efficiency of irrigation. The water use efficiency of the FI was 2.6 - 2.7kg/m3 and that of the AIFI reached more than 4.0kg/m3. The total water use efficiency of the AIFI reached more 2.98 kg/m3. Although the kernel yields of the AIFI remained to be more than 8000kg/ha in the two years, the irrigated water amounts declined from 3250m3/ha to 1575m3/ha. Thus the AIFI could save irrigation water by more than 33.3%, but did not severely reduce the corn yields. The wetting-drying alternation of the AIFI could stimulate the root growth, increase the root density and enhance the balanced root distribution; the dryness of partial root zone formed by the AIFI stimulated the roots to form the root signals to regulate the stomata openness, reduce the evaporation through the clearances among the plants, raise the evaporation efficiency and save the irrigation water.

关 键 词：TRANSPIRATION efficiency Root-partitioned CORN or MAIZE 

分 类 号：S5[农业科学—作物学]