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| DOI：10.13522/j.cnki.ggps.20190232 |
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| Effects of Drought Stress on WUE, Yield and Quality of Greenhouse Grape at Different Growth Stages |
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LIN Baojun , ZHANG Rui, DONG Bo, WEN Wen, GAO Yanting,WANG Yindi, YANG Changyu, WANG Tengfei
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1.College of Water Resources and Hydropower Engineering, Gansu Agricultural University, Lanzhou 730070, China;2.Academy of Agricultural Sciences,Gansu province, Lanzhou 730070, China
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| Abstract: |
| 【Objective】 The objective of this paper is to investigate the effects of drought stress at different growth stages on water use efficiency, yield and quality of grape in greenhouse cultivation. 【Methods】 The field irrigation experiment of water regulation in different growth stages of grape drip irrigation was carried out at the facility grape test base in Yongdeng County, Gansu Province.In the growth, flowering, fruit expansion and coloring stage of grape shoots, a field water holding capacity (FC) water supply level with a lower limit of 55% soil moisture was set, and the lower limit is 75%θf as control. The effects of different treatments on grape particle size expansion, yield, WUE, and quality were studied. 【Result】 The drought stress treatment of new shoots could inhibit the expansion of grape grain size, but it would not affect the “double S” variation of growth, and the particle size returned to growth after rehydration and the rehydration compensation effect appeared.The horizontal and vertical diameters reached the peak of expansion at about 14 d and 52 d after the expansion period, and the expansion rate at the first peak of expansion was much larger than that at the second time;The drought stress in the new shoot period and the coloring mature period increased by 44.6% and 42.5%, respectively, and the WUE increased by 71% and 57%, respectively. The drought stress in the fruit expansion period decreased by 9.7% compared with the control, and the WUE decreased by 1.2%.The growth stress and single grain weight of the new shoots in the growth stage, flowering stage and fruit expansion stage were significantly higher (P<0.05) than the control, and the anthocyanin content in the drought stress was significantly higher (P<0.05) than the control. The content of fructose, sucrose, glucose and soluble solids in the drought stress at maturity was significantly higher than that of the control, and inhibited the accumulation of titratable acid in grape fruit.The comprehensive analysis of the membership function showed that the comprehensive quality of the drought-stressed grapes was the best. 【Conclusion】The drought stress in the mature stage of coloring is the best water regulation treatment for grape cultivation in local facilities.It can achieve the production effect of saving water and improving the yield and quality of grape fruit. The water regulation mode is as follows:soil water is 55%~80% of field water holding capacity, and irrigation quota is 270 m3/hm2. |
| Key words: drought stress; grape; expansion rate; yield; WUE; quality |
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