Effects Of Cow Dung Compost And Corn Stalk Combined With Earthworm On The Growth Of Tomato And Soil Nutrients

In order to explore the effects of using cow dung compost and corn stalk and adding earthworms instead of chemical fertilizers on crop growth and soil nutrient,this experiment uses tomato varieties "Selected Century Pink Crown King" and earthworms " Eisenia foetida" as experimental materials in a solar greenhouse.In the form of potted plants,cow dung compost and corn stalk were used to replace part of the fertilizer,and earthworms were added to cow dung compost and corn stalk to explore the effects of using cow dung compost and corn stalk and adding earthworms instead of fertilizer on tomato growth,yield,quality and soil nutrients.The main findings are as follows:After 15 days of planting,the growth of plants treated with chemical fertilizers was obvious,and the plant height was higher than that of cow dung compost and corn stalk treatment by 26.9% and 28.6%,respectively.With the increase of colonization days,the plant height of tomato treated with chemical fertilizers gradually decreased.After 35 days of planting,there was no significant difference in the plant height of the fertilizer-treated tomato compared with the mixed treatment of cow dung compost,corn stalk and cow dung compost.After 45 days of planting,the tomato plants treated with cow dung had the highest growth rate,which was 4.0% higher than the lowest fertilizer treatment.After 15 days of planting,the stem size of the fertilizer treatment was significantly higher than the other treatments,which was 40.4% higher than the corn stalk treatment with the smallest stem diameter.After 25 days of planting,the stem diameter of fertilizer treatment was still higher than that of corn stalk and cow dung,25.9% and 17.2%,respectively.After 45 days of planting,there was no significant difference in the stem diameter of each treatment.After all treatments were applied,the plant height and stem diameter of the fertilizer treatment were the highest after 15 days of planting,and the stem diameter was significantly different from the other three treatments,which was 32.3% higher than the cow dung treatment with the smallest stem diameter.After the day of colonization,there was no significant difference in the stems of the four treatments.The plant height of the corn stalk-treated tomato plants was significantly higher than that of the corn stalk not applied to the earthworms after 35 days of application.Stem treatment after corn stalk application was significantly higher after 25 days than treatment without earthworms application.2.Corn stalk treatment and corn stalk and cow dung compost application were significantly increased by 38.1% and 37.6% compared with fertilizer after application of earthworms.The combined application of cow dung compost,corn stalk and cow dung corn stalk can significantly increase the phosphorus content of tomato roots regardless of whether or not it is applied.After the application of earthworms,the phosphorus content in tomato roots was increased by 62.2% compared with chemical fertilizer treatment.The treatment of cow dung compost and corn stalk significantly increased the potassium content of tomato roots.The combination of corn stalk treatment and cow manure corn stalk treatment also increased the potassium content of tomato roots after application of earthworms.3.The treatment of cow dung compost,corn stalk,cow dung compost and corn stalk increased significantly after the application of earthworms,which was 28.7%,29.5% and 28.5% higher than that of chemical fertilizer treatment.The application of cow dung compost and corn stalk and the addition of earthworms had no significant effect on the soluble solids and soluble reducing sugar content of tomato fruit.The content of organic acids in the cow manure treated tomato was significantly increased,which was 50% higher than that of the fertilizer treatment.The mixed application of cow dung corn stalks had the highest ratio of sugar to acid after the application of earthworms,reaching 4.56.The VC content of cow manure corn stalk mixed treatment was significantly improved by 66.9% compared with chemical fertilizer treatment.The content of VC in cattle manure treatment,corn stalk treatment and cow manure corn stalk treatment increased significantly by 69.8%,86.4% and 78.7%,respectively..In the corn stalk treatment,the VC content in the tomato was nearly doubled after the application of earthworms compared to no application of earthworms.The content of nitrate in tomato was significantly reduced regardless of whether or not the manure and corn stalk were applied.The nitrate content in the corn stalk with the largest reduction was 65.7% lower than that in the fertilizer treatment.4.The application of organic manure and earthworms had no significant effect on ammonium N and nitrate N in the soil.The content of available phosphorus in the soil treated with cow dung compost was significantly increased by 30.9% compared with chemical fertilizer treatment.The soil available phosphorus content in cattle manure and corn stalk treatment decreased significantly after the application of earthworms,which decreased by 26.6% and 23.4%,respectively.Phosphomonoesterase activity was significantly enhanced in the soil treated with cow dung compost.The content of available potassium in the soil mixed with cow dung,corn stalk and cow dung corn stalk was significantly reduced,and the corn stalk with the lowest available potassium content decreased by 43.2% after being applied to earthworms.The soil K in the corn stalk treatment was significantly increased by 16.7% compared with the fertilizer treatment.