不同渗灌埋深对温室黄瓜、番茄水分生产效率及土壤氮素的影响

研究了不同渗灌埋深对设施番茄、黄瓜生长、水分生产效率以及根层土壤无机氮变化的影响。结果表明,在相同灌溉量的情况下,与渗灌埋深在地下30cm相比,渗灌埋深在地下10～20cm对浅根系的番茄和黄瓜生长有利,能明显提高蔬菜的产量和水分生产效率,并能减少收获时0～20cm土壤无机氮残留。

Effects of Subsurface Irrigation Depth on Vegetable Water Use and Soil Nitrogen

The effects of different depth of subsurface irrigation on growth, water use efficiency and soil Nmin dynamics of greenhouse tomato and cucumber were investigated. The results showed that with the same irrigation rate, the growth of tomato and cucumber pipeline in the depth of 10 to 20 cm was better than those in the depth of 30cm. The fruit yield, water use efficiency significantly improved in the pipeline installed rather than it in 30 cm. Meanwhile the soil Nmin residues were cut down at harvest.