Effects Of Different Depth And Water Pressurelevel On The Growth,yieldand Quality Of Tomato In Trace Irrigation

Trace irrigation is a kind of technology based on the soil capillary action and filter membrane technologyto supply plant roots uniform,appropriate,uninterrupted water.The technology has been successfully applied in some areas and vegetables,and the water-saving effect is good.However,the application technology in Ningxia is still not clear.In order to explore the trace irrigation techniques suitable for the cultivation of tomato in solar greenhouse in Ningxia,‘Powder NO.1' was used for experiment and ordinary cultivars were taken as CK,researchinfluence of different depth and water pressure level on the growth,yield and quality of tomato in trace irrigation,to provide the technical basis for trace irrigation in the production and promotion of Ningxia area facilities vegetables.The results of this study are as follows:1.The effect of different buried depth the growth index and physiological index of tomato in trace irrigationNo matter what water pressure level,trace pipeline depth 15 cm was beneficial to supply the water directly to the tomato root,improved the plant height and stem diameter,the compression depth of 15 cm in the late growth stage compared with conventional irrigation for plant height and stem diameter of spring and summer crop stubble were increased by 24%,8.1%,6.7% and 18.8%.No matter what kind of water pressure level,the trace pipe depth of 5cm is conducive to improve the tomato leaf chlorophyll content,to improve the growth potential of tomatoes possible.Under the pressure condition,the leaf chlorophyll content was lower than the self-pressure condition,indicating that the water pressure could decrease the chlorophyll content of the leaf.The continuous supply of the trace pipe under the self-pressure condition would help to improve the tomato resistance.2.The effect of different buried depth to the fruit quality,single fruit weight and yield of tomatoin trace irrigationCompared with drip irrigation,the best self pressure depth 5cm the quality of tomato and tomato cultivation in early spring in the depth of 5cm hardness,soluble solids,Vc content and organic acid were increased by 4.5%,16.6%,46% and 44.5%.Under the conditions of self-pressure and pressure,the single fruit weight and yield of tomato increased with the increase of the buried depth of the trace pipe.But since the pressure conditions,yield of tomato was lower than that of the control pressure is higher than the condition of drip irrigation,drip irrigation control,and the compression depth of 15 cm is the highest yield,irrigation control,early spring tomato fruit weight and yield were increased by 10.6%,25%,and tomato fruit weight and yield were increased by 21.5%,14.6%.3.The effect of different buried depth to the water use efficiencyof tomatoin trace irrigationThe water use efficiency was improved under the condition of self-pressure and pressure,and the water use efficiency was higher than that of drip irrigation with only 10 cm depth and 15 cm depth.Based on the factors such as the growth of tomato plants,the root index,the quality yield and the water use efficiency,the depth of the trace pipe was 15 cm.