Study On Optimization Of Grape Drip Irrigation Pipelayout In Turpan Area

In inland arid regions of Xinjiang is one of the provinces most serious water shortage, water shortage has seriously hampered the sustainable development of oasis agriculture and the whole economy, the application of water-saving irrigation technologies that rely on water resources seriously Xinjiang region has significant and far-reaching impact. Especially in the Turpan area, where the dry climate, the huge annual evaporation, precipitation is very scarce. But natural climate makes this place special sweet fruits and sweet and cool, especially in Turpan grapes is world-renowned., Turpan grape production among the best in the country, Turpan grape quality, second to none in the world. Turpan is determined as the Northwest ’s only grape production base, is the main producing areas of the grapes. In recent years, water-saving irrigation technology in Turpan fruits farming has developed rapidly. However, due to the use of field irrigation traditionally Xinjiang region, on the promotion of drip irrigation is relatively slow. In drip irrigation districts have to spend some regions and successively encountered some problems, such as clogged dripper irrigation system is unreasonable, capillary laid way confusion, irrigation quota scientific issues such as the influence of fruit production, also affected growers using drip irrigation technology initiative. Therefore, this study Turpan grapes saving irrigation drip transformation, mainly local capillary optimized layout patterns and determine irrigation quota. By year experimental study, this paper the following conclusions:(1)The amount of capillary spacing and irrigation on the growth indicators are grapes, in which the grapes grow ear shoot growth and significant effect on capillary spacing of 60 cm arrangement of its role in promoting growth, increasing both growth rate. Increases in a certain range of irrigation also helps to improve the rate of shoot growth and ear growth. Leaf area index was less affected by capillary spacing and irrigation amount. Within a certain range to reduce the amount of irrigation and 40 cm capillary spacing arrangement helps reduce the total acidity of the grapes and increasing soluble solids, and in a certain range to improve irrigation amount and spacing of 60 cm capillary arrangement helps to improve the vitamin C content of grapes.(2)The distance between the capillary and capillary spacing 60 cm 40cm in processing, improving irrigation amount will help to improve the photosynthetic rate and transpiration rate of grapes, grape capillary spacing 60 cm photosynthetic rate and transpiration rate in each period to be larger throughout the day. 60 cm capillary spacing arrangement than grapes stomatal conductance 40 cm capillary arrangement should be large, but the latter increases the amount of irrigation significantly increased the degree of porosity, while the former did not change significantly. Capillary spacing of 60 cm and an increase in the amount of irrigation helps to improve certain CO2 concentration of grape cells. Overall, capillary spacing of 60 cm and a large amount of irrigation can increase the photosynthetic capacity of grape leaves.(3)Each grape growing period first increased and then reduced water consumption, water requirement of the most sensitive stage of grape berry enlargement period, followed by berries mature and mature vines, shoots growing, flowering and budding. To W2, for example, water consumption in grape berry enlargement reached a peak of 340.3mm, the maximum intensity of water at this time, is 6.9mm / d; dendrite maturation water consumption is 255.6mm, paragraph long growing season duration, so little water intensity of 3.2mm / d; followed a large amount of water and shoots growing maturity of the berries, water consumption is 98.6mm and 97.2mm, water consumption intensity 3.2mm/d-2.7mm/d; budding and flowering minimum water consumption for 25.5mm and 23.3mm, water consumption intensity was 1.5mm / d and 2.3mm / d.(4)The production of grapes for maximum water efficiency, irrigation quota is 850 mm, capillary spacing of 60 cm. Capillary spacing of 60 cm in layout mode, the appropriate increase in the amount of irrigation will help increase production of grapes. Capillary spacing of 40 cm when irrigation increases the amount of grape water production efficiency is decreased, this capillary spacing is set to the full use of grapes on the water, and the need for greater access to high-yielding irrigation amount. According fitting grape water production function, to obtain access to irrigation quota grape yield is 864 mm, and obtain higher productivity W2 grape processing water irrigation quota(850mm) similar. So drip Turpan grapes capillary spacing should be chosen layout 60 cm, irrigation quota in the range of 850mm-864 mm.