膜下滴灌调亏对加工番茄产量和水分利用效率的影响

通过加工番茄不同生育期膜下滴灌水分调亏试验,研究了水分调亏对土壤水分、株高、干物质积累、经济产量及水分利用效率和灌溉水利用效率的影响。结果表明,在苗期占田间持水率55%的水分调亏滴灌,可以在降低灌溉水量、耗水量和移栽前后土壤水分的同时,显著(p<0.05)增加番茄单株果数、单株果质量、产量、灌溉水利用效率和水分利用效率,而花期和盛果期分别施以上述水分调亏则结果相反,其中以花期表现最为显著(p<0.05),其次为盛果期。全生育期不进行水分调亏和仅在采收期施以水分调亏,虽产量显著(p<0.05)增加,但水分利用效率和灌溉水利用效率却显著(p<0.05)降低。

Effect of Regulated Deficit Drip Irrigation on Economic Yield and Water Use Efficiency of Processing Tomato Mulched with Plastic Film

Effect of deficit water regulation on soil moisture,plant height,dry matter accumulation,economic yield,water use efficiency,and irrigation water use efficiency was studied through experiment of regulated deficit drip irrigation in different growth period of processing tomato mulched with plastic film.The result showed that regulated deficit drip irrigation with 55% of water content in field capacity during seedling could not only decrease total irrigation water,water consumption,and soil moisture before and after transplantation,but also significantly(p<0.05) increase fruit number per plant,fruit weight per plant,economic yield,irrigation water use irrigation,and water use efficiency of processing tomato,while the result was significantly(p<0.05) different to that mentioned above for the water deficit regulation in flowering and fruiting,especially in the former.The economic yield was significantly(p<0.05) increased while the water use efficiency and irrigation water use efficiency were significantly(p<0.05) decreased without water deficit regulation and that merely regulating water deficit at harvesting.