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节水高产的浅湿灌溉技术较适合南太湖地区的水稻生产。试验选用苏南太湖地区水稻土中有代表性的粘土和重壤土作试验载体 ,系统地探讨了浅湿灌溉对水稻生理、生态及稻田生态环境的影响 ,水稻平均比浅水勤灌增产 6.1 %。经对降水利用率、稻田耗水量、灌水量测定 ,浅湿灌溉比浅水勤灌分别增加 1 4 .6%和减少 1 9.2 %和 30 % ,收到了节水高产的效果。对地下水埋深和土壤含水率对应关系的测定 ,得出 ,稻田落干时地下水埋深以 30 cm为宜 (烤田期除外 )。在此范围内 ,地下水埋深每下降 1 0 cm,土壤含水率下降 1 %～ 5%。据此大田试验 ,得出了水稻的最优灌溉模式
Water-saving and high-yielding shallow wet irrigation technology is more suitable for rice production in the South Taihu Lake region. In the experiment, representative clay and heavy loam in paddy soils of Taihu Lake in southern Jiangsu were selected as test carriers to systematically investigate the effects of shallow wet irrigation on the physiology and ecology of paddy rice and the ecological environment of rice paddy. The average yield of paddy rice was 6.1% higher than that of shallow irrigation. The water saving and high yield were achieved after the utilization efficiency of precipitation, paddy field water consumption, irrigation volume, shallow wet irrigation increased by 14.6% and decreased by 9.22% and 30% respectively. The correlation between groundwater depth and soil water content was determined. It is concluded that the depth of groundwater in the paddy field should be 30 cm (except during the bake field). Within this range, the groundwater depth decreases by 10 cm and the soil moisture content decreases by 1% -5%. Based on this field experiment, the optimal irrigation mode of rice was obtained