The Effect Of Different Irrigation Quantities On Tomato Yield And Soild Nutrient Changes In Soild Greenhouse

Greenhouse can fully utilize light, heat, water, soils and waterresources, and provide aappropriate environment for growing crop. In the case ofwater resources has become increasingly scarce in the backdrop. The dripirrigation with water-saving irrigation technology is widely used in the greenhousevegetable production, and the benefits and importance are more and morehighlights. It is very important for inverstigating the water features of greenhousevegetables requirement and irrigation indicators to promote solar greenhousewater-saving irrigation development, improve water utilization, to direct sunlightgreenhouse vegetables.Using the spring solar greenhouse tomato as the object of study,the tomatoes cultivated on the high row in two row tomato seedling. The dailyreference crop evaporation transpiration rate (ET0) were be calculated,the cropcoefficient (Kc) of tomato in different growth stage were in accordance with FAO﹣56, the evaporation transpiration rate (ETc) were be calculated. The4irrigationrequirement were be produced by1.0、0.9、0.8、0.7times the ETc calculatedbefore.The effect of different irrigation requirement on Tomato yield and and quality and soilnutrient changes in sunlight greenhouse were be investigated, the initialresults were as the following:(1) In the whole tomato growth period, different irrigation treatments had littleeffect on plant height and stem diameter; it’s more precise to multiply leaf length (l)and width (b) to estimate the area of tomato leaf, the leaf area of tomato test "RisingStar No.1" estimation model is: y=(02272×l×b)1.0274; leaf area results showed peakincreases with the amount of irrigation, but excessive irrigation lead to leaf area’sdecrease.(2) With the irrigation increasing, Tomatoes’ average single seedling on theearth and in the underground, fresh and dry material accumulation is graduallyincreasing.From the nutrition growth perspective,when the evaporation fromMc-Cloud Computing equations is directly used for irrigation, the biggest amount of nutrition growth can be obtained.(3) Different irrigation treatments was no difference in the average number offlowers per plant; average number of fruit per plant, fruit, average fruit weight andyield decreased with decreasing irrigation.The average number of fruit per plant inprocessing I were significantly higher than that in other treatments, the averageweight maximum, the highest yield for the average weight of121.3g, production was9367.85kg/667m2, water use efficiency was30.03kg·m-3~34.77kg·m-3, average fruitweight and yield were significantly higher than those in other treatments, waterproduction efficiency decreases with the increase of irrigation.The amount ofirrigation and fertilization play an decisive role on the tomato production.Theirrigation amount reducing by10%can quickly cause the reduction of production andwater use efficiency, water reduction between20%and30%of the two processes,yield and water use efficiency was insignificant. In order to obtain a higher yield oftomato, the evapotranspiration counted from Mc-cloud equation can be directly usedto guide the irrigation.(4) Different irrigation treatments affect tomato fruit quality, Vc contentsincrease with the irrigating water decreasing, but reduced in the minimum irrigatingwater amount; organic acid content in processing II and III is higher, then lower;soluble sugar in processing III and IV is higher, it didn’t reduce when the irrigationreduced. Tomato fruit Vc, organic acids and soluble sugar content increase with theflood fertilizer reducing. From the aspect of improving quality, it is conducive toenhance the quality when the irrigation amount reduces properly.(5) In the0~20cm soil layers are the main absorption of nutrients. In the fruitsetting stage potassium reduction of the absolute value in0~20cm soil layers is themaximum, potassium absorption is biggest. Alkali-hydrolyzable nitrogen in0~40cmsoil layers with higher irrigation treatment in tomato fruit bearing stage has a clearcumulative phenomenon; soil quick potassium with different water treatment in20~60cm soil layers has a clear increasing trend. From the perspective of soil nutrientaccumulation greenhouse tomato crop in spring using evapotranspiration Mc-cloudcomputing equation with the test formulation and concentration of nutrient solution,the amount of potassium should be reduced in the period of fruit bearing.