The Effects Of Soil Properties,growth And Fruit Quality Of Jujube Which Caused By Drip Irrigation With Slight Saline Water

How to use reasonably brackish water and add the shortage of fresh water resources will become the inevitable trend of long-term development in South Region of xinjiang. In this experiment, using different proportions of mixing tank Saline Water drip irr igat ion jujube. Research soil water, salt and nutrient change under slight saline water drip irrigat ion.and growth and quality of jujube change, resulting in jujube of slight saline water irrigation mixed scale range. Here are some of the main findings of the current income experimental:(1) The results that slight saline water of different total dissolved solid impact on physical and chemical properties of soils showed, Except PH value of soil and soil organic matter and soil available potassium, the rest of the soil physical and chemical indicators with increasing total dissolved solid(TDS) of irrigation water have an increasing trend, in which the soil conductivity and sotal dissolved solid of irrigat ion water is a signif icant positive correlat ion; Soil water, salt and nutrient are mainly distributed in the area of soil gamut 0-20 cm, conductivity, total dissolved solid, available phosphorus and available nitrogen have a greater change in this soil layer. Using Principal Component Analysis method, and factor composite score,It can be found soid of slight saline water irrigation is deteriorating. But mixing tank ratio is 1: 2(salt water: fresh water) and TDS was 2.9g / l treatment have a minimal effect on soil.(2) The results that slight saline water of different total dissolved solid impact on growth of jujube showed,with increasing TDS of irrigat ion water,Soil salinity and conductivity increases,area of leaf,circumferenceand of leaf, section bit length of the first branches and number of second branch increases.The net photosynthetic rate, Stomatal Conductanc, intercellular CO2 and the transpiration rate decrease, yield per plant and leaves fruit ratio decrease. Show that irrigation water TDS is less than 4.35 g / l, jujube favor vegetative growth, but due to the decline of plant leaf water potential and stomatal conductance, photosynthetic rate decreased significantly and reduce the supply of assimilates and energy, so the output produced adverse effects.(3) The results that slight saline water of different total dissolved solid impact on quality of jujube showed, with increasing TDS of irrigation water, Soluble sugar, reducing sugars and organic acids of Jujube fruit content decrease,but the vitamin C and soluble solids increase, and soluble sugar was signif icantly negatively correlated with the vitamin C content was significantly posit ively correlated. By subordinate function of brackish water drip jujube quality comprehensive evaluat ion found that different brackish water irrigation mixed mode mixed irrigat ion ratio of 1: 4(salt water: fresh water), TDS was 1.73 g / l processing jujube the best fruit quality.In summary, improving yield and quality of dates or guarantee does not drop the case, brackish water irrigat ion mixed mode mixed irrigat ion ratio of 1: 4-1: 2(salt water: fresh water), salinity 1.73 g /l-2.9 g / l is the best irrigation method, which not only improves the efficient use of water resources in Xinjiang efficiency, while also maintaining the Saline water irrigation under sustainable land use, due to the rapid development of a final settlem ent of the fruit industry brought water conflicts.