Effect Of Water Irrigation On Different Vegetable Growth And Physical And Chemical Properties Of Soil Planted Vegetables After Wheat Harvest

In order to study the effects of different vegetable growth and soil physical and chemical characteristics of spring wheat in Ningxia,four fruits and vegetables:pepper(Jiaolong 17),leaf vegetables:cabbage(Huayi B1102),W1:100 m3/667m2,W2:140 m3/667m2,W3:180 m3/667m2 and W4:220 m3/667m2.Through the determination of plant growth index,soil physical and chemical traits,soil enzyme activity and other related indexes,the comprehensive effects of different irrigation amounts of three vegetables on vegetable growth and soil physical and chemical traits were studied,and the appropriate patterns of spring wheat were selected.The main results are as follows:1.Different amounts of water has a significant impact on the soil physicochemical properties of pepper,baby cabbage and radish in the 0-40cm soil layer.The appropriate irrigation amount is beneficial to improving the content of total nitrogen,alkali nitrogen,total phosphorus,quick phosphorus and quick potassium of the three kinds of vegetables,All three vegetables under W2 treatment,The content of total nitrogen,alkali lysis nitrogen,quick phosphorus and quick potassium in 0-20cm soil is significantly higher than that of 20-40cm soil;The change of soil organic matter under the four irrigation treatment is:W3>W2>W4>W1;There was no significant difference in the soil pH value of different vegetables under the same irrigation treatment;Soil capacity is shown:W1>W2>W3>W4,The soil capacity weight of different soil layers is as follows:0-20cm<20-40cm;The soil conductivity was maximized under W4 treatment.This shows that the suitable irrigation volume has a significant effect on improving the soil physical and chemical properties.2.Different water perfusion amount has different effects on the soil enzyme activity of pepper,baby cabbage and radish in the 0-40cm soil layer.Under different irrigation treatments,the activities of sucrase,urease and alkaline phosphatase of various vegetables were the highest under W3 treatment,there was no obvious rule between soil sucrase activity of different vegetables with the fertility process,and the activity of urease and alkaline phosphatase was the highest during the fertility period on September 23 and August 21 respectively;the activity of the fertility treatment gradually decreased.In conclusion,suitable irrigation water helps to increase soil enzyme activity.3.Different water perfusion amount has different effects on the plant growth indexes of pepper,baby cabbage and radish.Plant height and leaf area are important indicators to measure the growth of plant,plant height and leaf area of various vegetables are increasing with the advancement of fertility period;under different irrigation treatment,pepper SPAD value:W3>W4>W2>W1,radish and baby vegetables SPAD value:W2>W3>W1>W4,pepper and radish peaked on August 21 and September 23,the maximum SPAD value was 51.80 and 46.40 respectively,baby vegetables peaked on September 7,and the maximum SPAD value was 54.70.This paper shows that the suitable irrigation water can significantly improve the growth index value of the three kinds of vegetables.4.Different irrigation has different effects on the yield of pepper,baby cabbage and radish.The specific expression of pepper yield with the increase of irrigation water is:W3>W4>W2>W1,and the highest yield is 995.19 kg/667m2.The yield of baby cabbage and radish under different irrigation treatment is:W2>W3>W4>W1,and the highest yield is:3568.54 kg/667m2 and 3182.40 kg/667m2 respectively.It shows that the reasonable irrigation can significantly improve the vegetable yield.5.The multiple planting of spring wheat can improve the economic benefits.Spring wheat-pepper has the highest 2783.17 yuan/667m2 under W3 treatment,spring wheat-baby cabbage and spring wheat-radish have the highest economic benefits under W2 treatment,with 2868.54 yuan/667m2 and 3437.70 yuan/667m2 respectively.6.Comprehensive principal component analysis and membership function evaluation,the optimal irrigation water of pepper,baby vegetables and radish was W3,W2 and W2,respectively,and pepper and baby vegetables were the optimal planting mode,and the corresponding optimal irrigation was 180 m3/667m2 and 140 m3/667m2 respectively.