Effect of different proceding crops on yield, quality of cucumber and soil enzyme activity in solar greenhouse

Dynamic changes in cucumber yield, quality, soil respiration and enzyme activity were studied under different proceding crops in different growing seasons in Yan’an solar greenhouse. The results show that cucumber yield and soil alkaline phosphatase activity are high under cowpea-cucumber rotation. Soil respiration and cucumber soluble sugar content significantly increase under tomato-cucumber rotation. Vc content of cucumber improves significantly under kidney bean-cucumber rotation. Soil urease activity and nitrate content of cucumber also increase under maize-green manure-cucumber rotation. And sucrase activity in the soil is highest under black bean-green manure-cucumber rotation system. For high cucumber yield, cowpea-cucumber rotation system is the most suitable model. However, tomato-cucumber and kidney bean-cucumber rotation systems are the most suitable models for improving cucumber quality.