摘要
对番茄早春育苗的苗床灌溉最佳土壤含水量上限数值进行了试验研究。结果表明，土壤含水量为相对含水量的９０％（ＰＦ值１．６），较常规灌至土壤相对含水量１００％，植株干物质积累增大，壮苗指数提高，光合速率、根系活力增强，蒸腾速率降低。因此认为番茄苗床灌溉土壤含水量最佳上限为９０％。
The optimum soil moisture content index about tomato seedling bed irrigation was conducted out in early spring .The result showed that when soil moisture content is 90% of the relative moisture content,it resulted in an increase in plant dry substance accumulation and strong seedling index ,a reinforce in net photosynthetic rate and root vitality ,and a decrease in transpiratory rate ,compared with the nmrmal irrigation which is 100% of the soil relative moisture content .It is concluded that 90% is the optimistic soil moisture content for tomato seedling bed irrigation.
关键词
番茄
灌溉
土壤含水量
最佳指标
tomato
irrigation
soil moistuer content
optimistic index
