Effects of Returning Tomato Straw in Greenhouse and Reducing Fertilizer Application on Yield,Quality and Nutrient Absorption of Cucumber
Cucumis sativus L.was used as the test material.After pulling tomato seedlings in autumn in the greenhouse,four treatments were carried out,non-returning straw and topdressing once and twice(CK1,CK2),returning straw and topdressing once and twice(T1,T2).The effects of returning straw and reducing fertilizer on yield,quality and nutrient uptake in the second spring crop cucumber were studied,in order to provide reference for the cultivation and management of greenhouse vegetables.The results showed that compared with the non-returning treatment,the yield of returning tomato straw treatment was significantly increased.Among them,the yield of returning straw and topdressing once treatment was significantly higher than that of non-returning treatment,and the yield of returning straw and topdressing twice treatment was significantly higher than that of topdressing once treatment.The quality of returning tomato straw treatment showed no significant difference between the topdressing once and twice treatments,but both treatments were significantly higher than those non-returning straw.After 50 days of planting,returning straw significantly improved the absorption of nitrogen and phosphorus by plants,and increased potassium absorption by 70 days.At 50 days and 70 days,the absorption of trace element silicon was significantly increased.At 30 days and 70 days,the soil pH was increased,and at 50 days the soil EC value was significantly reduced.At 70 days,the EC value of returning straw and topdressing once treatment was significantly lower than that of non-returning treatment.The bulk density was significantly decreased and the porosity was significantly increased in returning straw and topdressing once.Therefore,we concluded that returning straw and topdressing once is feasible in application.
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