Effect of Bio-organic Fertilizers on Quality and Soil of Continuous Crop Chinese Flowering Cabbage.

In order to solve the obstacles of successive crop and improve the yield and quality of successive crop, we applied bio-organic fertilizer (0, 3 000, 4 500, 6 000 and 7 500 kg⋅hm^-2) to Chinese flowering cabbage as the experimental material to study its effect on the growth, quality and soil of successive cabbage. The results showed that the application of bio-organic fertilizer significantly increased the plant and shoots weight of continuous crop flowering Chinese cabbage, and soil organic matter, alkali hydrolyzable N and electrical conductivity were also increased with the same treatment. In addition, bio-organic fertilizer substantially increased the activity of soil acid phosphatase, catalase and sucrase, but decreased the activity of urease. Compared with cheinicoil fertilizer, the application of 7 500 kg⋅hm^-2 of bio-organic fertilizer, the content of vitamin C, protein, crude fibre and soluble solids of successive vegetable shoots were increased by 6.28%, 12.39%, 5.30% and 37.38%, respectively. Moreover soil organic matter, alkali hydrolyzable N and electrical conductivity were increased by 59.67%, 97.63% and 175.76%, respectively. The activitiy of acid phosphatase, catalase and sucrase in root zone of soil were greatly increased by 23.10%, 7.40% and 116.92%, respectively, while urease was decreased by 8.39%. The numbers of bacteria, fungi and actinomycetes were noticeably increased by 80.62%, 79.26% and 46.00%, respectively, and the relative abundance of bacteria and fungi also increased. In conclusion, application of bio-organic fertilizer could improve the growth and quality of continuous cropping flowering Chinese cabbage, and increase the soil fertility and microbial diversity. [ABSTRACT FROM AUTHOR]