Effect Aerated Irrigation On Growth Of Cucumber And Tomato In Big-Arch Shelter

Aerated irrigation can increased oxygen content of crop root zone, improve theenvironment of crop root zone effectively, promote the growth of crop roots respiratory, andimprove yield and quality of crop.At present, both at home and abroad, the venturi in synchronous methods have beenapplied to the field. Although this approach can also be water vapor mixture to the crop rootzone, but it does not identify specific aeration suitable for crop growth and capacity, and it hashigh cost. For this status, in this test is a method that the aeration is transported to crop rootusing air compressor connected with subsurface drip irrigation (SDI) tape after irrigating. Theindoor mechanism test studied the effects of different soil water into permeability and aerationafter permeability on soil guide gas characteristics. The field community test set undergrounddrip irrigation, and furrow irrigation2species irrigation way, and set3species aerationcoefficient (0.5,0.75,1.0), and non-aeration as control. The test researched the changes ofdifferent aeration conditions in large shed cucumber and tomato growth, yield, and water useefficiency and quality. The main conclusions are as follows:(1) Under the same head pressure and same density, the cumulative infiltration of Brownloam soil is better than Lou soil, its infiltration is better. After the infiltration of artificialaeration and water distribution process can increase the rate of aeration in moist soils,especially on improving the ventilation of moist soil of the former. It has a significant role inpromoting, through two types of soil aeration on the gas after the infiltration rate changes,came to the strong sensitivity of Lou soil by artificial aeration.(2) Under the same conditions of aeration, the effects of different irrigation methods oncucumber plant height and stem diameter are not the same. Compared with furrow irrigation,the growth of SDI cucumber is better, and its growth rate is faster. In the same waterconditions, with aeration coefficient increases, the growth plant height and stem diameterincreased.(3) There is a significant influence of different aeration irrigation treatments onchlorophyll content of the cucumber. The SDI with the aeration coefficient of0.75highchlorophyll content and aeration relatively low coefficient of chlorophyll content of0.5and1.Description under SDI conditions suitable for accumulation of chlorophyll content of aeration helps, can promote photosynthesis, also could contribute to the accumulation of dry mattercontent of crops.(4) Under the same coefficient of aeration treatment, compared to furrow irrigation, SDIcan significantly increase crop yields and quality. Under the same irrigation, the yield andquality of aeration treatment is also significantly higher than non-aeration treatment. Thatexplains aeration integrated SDI can promote increased yields and quality and improve wateruse efficiency. The yield of SDI with the aeration coefficient of1.0is the highest; it increasedby47%compared with that where the SDI without aeration was practiced. The aerationintegrated SDI saved water by40.37%compared with the aeration integrated furrowirrigation. The water use efficiency increases10.53～16.68kg·m-3. The SDI with the aerationcoefficient of1.0has a higher the content of Vc, soluble, soluble protein and soluble solidscontent is also higher than those of other treatment.Test also studied effects of different aeration coefficients (design with cucumbers) ongrowth of tomato under subsurface drip irrigation, in order to find an optimal aerationcoefficient to be suitable for the growth of tomato. The results show that the effect of differentaeration coefficient treatment on growth of tomato aerial parts significantly. The chlorophyllcontent, plant height and stem diameter are with increasing aeration coefficient of firstincreasing and then decreasing. Therefore, proper aeration can guarantee the normal growthof tomato. Although the plant height, stem diameter and leaf growth in aeration coefficient of0.75is better, the yield and quality of tomato is not the best. The test results indicate thattomato can get maximum yield and superior quality in aeration coefficient of1.0. The yield,sugar content, sugar acid ratio and Vc content in aeration coefficient of1.0than non-aeratedtreatment can improve21.9%,2.13%,22.03%,20.08%. Crop yield and quality is the focus ofresearch. So we think the SDI with aeration coefficient of1.0is a new type of water-savingirrigation technology to be more appropriate of popularization and application.