Comparative study on the effects of catch crops on soil environment in solar greenhouse

This article focused on the soil in the greenhouse of continuous cropping only three years to discuss the sustainable utilization of planting models of the soil in the greenhouse and the authors introduced several catch crops in continuous two years including sweet corn, spring onion, common bean (hairy vetch), fast leaf vegetables and studied how they influenced the soil environment. The results indicate that growing spring onion in summer can increase the numbers of bacteria and antinomyce obviously in the soil layer of 0～30 cm, improve the ratio of B/F obviously, increase the total of soil microflora, increase the soil microbial ,inhibit the propagation of fusarium and the total of nematodes-root knot-nematodes and parasitic nematodes increase only a little, and growing fast leaf vegetables and sweet corn can reduce the content of nutrient in the soil and the value of EC. Therefore, planting scallion in summer fallow period in greenhouse can meliorate obviously soil biological environment and growing fast leaf vegetables and sweet corn can reduce obviously the accumulation of nutrient in the soil and inhibit the formation of alkalization.