Study on Influence Relations of the Soil Water Deficit Irrigation to Rice Leaf Area and Evapotranspiration in Black Soil Areas of Cold Region
Effects of regulated deficit irrigation on leaf area and evapotranspiration in paddy rice was studied through regression analysis, relative soil saturated water content and field water depth was taken as index factors, homogeneous design and field experiment methods was used in the paper. It shows that, LAI and evapotranspiration reached a peak in flowering stage, the effects of LAI on yield was obvious in flowering stage and milk stage through significant correlation analysis of light transmittance and LAI, moderate increase of leaf area could be kept under regulated deficit irrigation in different growth period, loss of evapotranspiration was reduced 48.1％ on average, the effect of water saving was obvious, rice yield was increased 1.29％.
black earth of cold region paddy rice regulated deficit irrigation LAI
Li Fang-hua Sun Yan-ling Yin Gang-ji Cai Ti-jiu
Forestry college, Northeast Forestry University, Harbin, China Department of irrigation technology, Heilongjiang Water Conservancy Institute, Harbin, China
国际会议
山东淄博
英文
583-589
2011-05-27（万方平台首次上网日期，不代表论文的发表时间）