根系分区交替滴灌周期对番茄产量品质及水分利用效率的影响

Effects of the Cycle of Alternate Partial Root-zone Drip Irrigation on Yield,Quality and Water Use Efficiency of Tomato

为研究根系分区交替滴灌周期对番茄的产量、品质及水分利用效率的影响,在河海大学节水园区进行设施栽培番茄的滴灌试验。结果显示:50%ET0和75%ET0灌水量处理节水效果显著,但只有75%ET0灌水量处理减产不明显;在相同的水分亏缺处理下,节水效果、水分利用效率、可溶性糖含量、糖酸比、可溶性固形物含量与交替周期成正比。综合分析本试验结果认为:在合理的水分亏缺范围内,适宜地提高交替周期不仅有助于番茄果实品质的提高,而且可以在保证作物产量的同时提高水分利用效率,试验结果对确定设施栽培番茄的交替灌溉制度具有重要意义。

The drip irrigation experiment of greenhouse tomato was carried out at the water-saving park of Hohai university for studying the effects of the cycle of alternate partial root-zone drip irrigation on yield quality and water use efficiency of tomato.The results indicated that 50% ET0 treatments and 75% ET0 treatments showed remarkable water-saving effect,but only the yield decrease of 75% ET0 treatments was unconspicuous.Effect of water saving,water use efficiency,Solube sugar content,sugar-acid ratio,solid content were proportional to the alternate cycle under the same level of water deficit.According to the results,appropriate increasing alternate cycle not only contributed to improve the quality of tomato within the limits of reasonable range of water deficit,but also improve the water use efficiency with ensuring the yield,The results was of great significance to determine the alternate irrigation system of greenhouse tomato.