Yield raising and water saving
irrigation techniques for paddy rice applied in other regions are also suitable for Tai
Lake Area in south Jiangsu. Based on experiments carried out on clay soil and clay loam soil in Tai Lake area, the growth, development and yield formation in paddy rice are described in this paper. Study
results shown that benefits for water saving and yield raising in paddy rice are significant, under "shallow moisture"
irrigation system. Water consumption and irrigation water application can be reduced 19.2% and 30% respectively. Rainfall use efficiency increases 14.6% and yield increases 6.1%, taken traditional "shallow water and continuous irrigation" irrigation system as CK. According to experimental results, water table best can be controlled below 30 cm during drying period on paddy rice field. Soil moisture will reduces about 1% to 5% with every 10cm dropping of groundwater level. The optimum irrigation regime for paddy rice in Tai Lake area, based on field experiment results, is also presented in this paper.