The Influence Of Alternate Partial Root-zone Irrigation On Water Use Traits And Yield,quality Efficiency Of Wine Grape

Alternate partial root-zone irrgation is a new irrigation methods are put forward in recent years. It emphasizes to keep part of the crop root zone drying, another part of the moist, such alternate exercise stimulates the root system to absorb compensation function, also can through the root source abscise acid(ABA) to adjust the opening of stomata best, reduce the luxury transpiration to achieve the purpose of saving the limited water resources. With 5 years of cabernet sauvignon as experimental material study the new shoots growth, soil moisture change and change characteristics, optical and physical characteristics, osmotic regulation, the influence of the yield and quality use CDRI for irrigation In the bud- flowering period, flowering, fruit, fruit- turn color respectively set up fully drip irrigation(control), moderate and severe three irrigation levels. The main results were as follows:1 Wine grape seed- flowering period, flowering, fruit, fruit- turn color three periods of irrigation water accounts for 40%, 15.5% and 44.5% of total irrigation water. Points root zone under adi processing comparing with routine irrigation water-saving irrigation water can be up to 47.85-56.1% %. The change trend of soil moisture content of ups and downs in a transverse wave type appear alternately, in the vertical is roughly "S" type distribution.2 In wine grape germination to flowering period is closely relative to new tip growth rate and irrigation water, over- fructifications period points for moderate deficit root zone alternate irrigation is more advantageous to the growth of new shoots. Root of adi under rdi processing can make wine grape grain number and grain weight, fruit weight and yield decreased, Germination, flowering period of moderate rdi cut at least 4.3% than control, and germination to flowering of severe rdi output maximum 38% than control. But the deficit treatment can effectively improve the efficiency of irrigation of wine grape production.3 In the flower- stage boron and boron- turn color of moderate deficit can improve the quality of the wine grape fruit. Fruit soluble sugar content, soluble protein content, Vc content and tannin content are negative correlation with irrigation water, but severe water deficit will affect the increase of its content.4 Wine grape leaf net photosynthetic rate and diurnal change of intercellular co2 all showed a trend of "double hump", while stomatal conductance and transpiration rate is on the decline on the whole. Water deficit treatment can improve the single blade instantaneous water use efficiency, A, C, E relative to B, D, F, water is more, but the single leaf water use efficiency is not high. Root domain alternate irrigation treatment can reduce the average daily wine grape carboxylation efficiency.5 After dealing with the points alternately root zone irrigation wine grape leaf osmotic regulation ability was strengthened. Alternately points root under the moderate water deficit irrigation can significantly improve the soluble sugar, soluble protein and free proline content, make it could bolster the drought-resistant ability of wine grapes.