基于基于TOPSIS法对和田地区温室番茄滴灌方案优选研究

Optimization of Drip Irrigation Schemes for Greenhouse Tomatoes in Hotan Prefecture Based on TOPSIS Method

为了确定和田地区日光温室越冬茬番茄适宜的灌溉指标,进而为该地区设施农业的科学灌溉提供理论依据,于2020年10月至次年4月,以番茄“粉保利”为材料,在新疆昆玉市现代农业科技示范园进行了灌溉试验。设置了4种土壤水分下限处理T1、T2、T3和CK(分别为田间持水率的45%、60%、70%及80%),利用TOPSIS法对滴灌方案进行综合评价优选。研究表明:T3水分下限处理与CK处理相比可提高番茄产量7.5%,T1处理番茄产量最低。随着番茄水分下限升高,灌水量增加,灌溉水利用效率和水分利用效率显著降低。降低水分下限对番茄可溶性固形物(TSS)、可溶性糖、Vc、可滴定酸含量和果实硬度影响显著(P<0.05)。采用TOPSIS法,对番茄产量、水分利用效率、灌溉水利用效率及品质综合评价,得出适宜本地区越冬茬番茄滴灌水分下限最优处理为T3(70%田持)处理。

In order to determine the suitable irrigation indicators for overwintering tomato crops in the solar greenhouse in Hotan Prefecture and provide a theoretical basis for scientific irrigation of facility agriculture in the area,irrigation experiments were conducted in the Modern Agricultural Science and Technology Demonstration Park of Kunyu City,Xinjiang from October 2020 to April of the following year,using tomato"Fenbaoli"as the material.Four lower soil moisture limit treatments T1,T2,T3,and CK(45%,60%,70%,and 80%of the field water holding capacity,respectively)were set up,comprehensive evaluation and optimization of drip irrigation schemes were made using the TOPSIS method.Research has shown that compared with CK treatment,T3 lower water limit treatment can increase tomato yield by 7.5%,while T1 treatment has the lowest tomato yield.As the lower limit of tomato water content increases,the irrigation amount increases,and the irrigation water use efficiency and water use efficiency significantly decrease.Lowering the lower water limit had a significant impact on the content of soluble solids(TSS),soluble sugars,Vc,titratable acids,and fruit hardness of tomatoes(P<0.05).Using the TOPSIS method,a comprehensive evaluation was conducted on tomato yield,water use efficiency,irrigation water use efficiency,and quality.It was found that the optimal water limit for drip irrigation of overwintering tomatoes in this region was T3(70%field holding)treatment.