| Turpan-KumulBasin is the birthplace of characteristic melon and fruit cultivation in xinjiang, with a long history and tradition. The area is currently the largest seedless grapes production base, it is also the national agricultural divisions of grape advantage area. Because the turpan and hami belong to typical continental climate, where the frost-free period is long, in the summer where it is drought with little rain and high temperature, so it is. one of the most water shortage regions in the country. In the region the contradiction between supply and demand of water resources is very prominent, plus agricultural irrigation technology is backward, water resources waste is serious, therefore, to select the suitable water-saving technology, the establishment of regional comprehensive water-saving technology system are necessary to ascend irrigation level and ensure the sustainable development of characteristic melon and fruit industry As one of the most efficient agricultural irrigation technique, in recent years drip irrigation is widely used in the irrigation of fruit trees,and has the better development. The main purpose of this study is through the experimental research on the application of drip irrigation in grape to explore water deprivation characteristics and the optimum irrigation system of grape under drip irrigation, providing scientific theory for drip irrigation technology in local accumulates promotion.In this paper,grape was irrigated under drip irrigation with different water to research the corresponding strength changes process of field water deprivation, reference crop water requirement, crop coefficient, grape growing conditions and irrigation system. Through field experiment and theoretical analysis, the conclusions are reached as follows:(1) Irrigation water had a significant impact on the on the soil moisture content, the soil moisture content was bigger with the greater irrigation water. Local grapes absorption root in vertical direction mainly distributed in 0～60cm soil inside, and the horizontal main distribution was within the lm width. In the grape birth period, before irrigation the soil moisture of each irrigation treatment was lower, so we should appropriately shorten irrigation cycle.(2)Water consumption of grapes in the whole growth period was a dynamic variables.In berries growing period it was the largest, then was berries maturity, then was the new shoots growth and t branch maturity, the water consumption in budding and flowering period was smaller; under drip irrigation water strength of grape in various growth periods were respectively:3.14～3.7mm/d in budding period,4.38～5.44mm/d in new shoots growth period,4.66～5.94 mm/d in flowering period,6.32～8.02 mm/d in fruit swollen period, 6.02～6.67 mm/d in mature period,2.66-3.58 mm/d in branch mature period.(3)Local reference crop water requirement was computered through Pernman-Monteith, the local crop coefficients of grape was concluded under different drip irrigation water, which changed from low to high,then to low. In berries growthing period it was the lagerst, which the peak was 1.34,in berries maturity period it started to reduce and in the branch maturity period it imploded.(4) The growth of grapes under drip irrigation was normal, which growed faster at early growth and relatively slower at later growth. Local grapes yield with drip irrigation had not only obviously saved water,but also increased production.Compared with furrow irrigation, the rate of water-saving had reached 45.9%,and the rate of growth had reached 11.7%.(5) Based on experimental actual situation, The peper through theoretical analysis and calculation got the drip irrigation quota of grape in turpan-hami basin which is 745mm, and total irrigation frequency is 27 times. |
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