Effects of alternate root-zone irrigation on physiological growth and yield of processing tomatoes in northern Xinjiang
ZHAO Di1,2, WANG Zhenhua1,2*, LI Wenhao1,2, ZHANG Jinzhu1,2, LYU Desheng1,2, ZHANG Jifeng1,2
1.College of Water Resources and Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China; 2.Key Laboratory of Modern Water-saving Irrigation of Xinjiang Production & Construction Group, Shihezi, Xinjiang 832000, China
Alternate root-zone irrigation is widely used in horticultural crops and crops to achieve the purpose of high efficiency and water saving. In this study, a barrel planting experiment was conducted to study the physiological growth and yield changes of processing tomatoes at three irrigation levels(W1: 5 850 m3/hm2, W2: 4 500 m3/hm2, W3: 3 150 m3/hm2)by combining three irrigation metho-ds(AI, FI, CI)with drip irrigation film mulching. The results show that under W1 condition, AI, compared with CI, significantly increases root dry matter quality, yield and water use efficiency by 5.95%, 16.87% and 17.29% respectively. Compared with FI, it increases root dry matter quality, yield and water use efficiency by 14.62%, 19.77% and 8.33% respectively. The maximum value of SPAD, Fv/Fm, Qp, Pn and iWUE are all in AIW1 treatment, the maximum value of non-photochemical quenching coefficient Npq is appeared in FIW3 treatment. There is a good correlation between yield, net photosynthetic rate and root-shoot ratio. In summary, AIW1 is the best irrigation mode that is conducive to the efficient water-saving and yield increase of processing tomatoes.
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