Effects of partial replacement of chemical fertilizer by different treatments of meat duck manure on Chinese cabbage and soil environment
The aim of this study is to investigate the effects of using duck manure fertilizer instead of chemical fertilizer on the quality of Chinese cabbage and the soil environment.A pot experiment was conducted to study the changes in the yield and quality of Chinese cabbage and the soil environment under the effect of replacing 30%,50%,and 70%of chemical fertilisers with the nitrogen equivalent of meat duck manure rotted using three treatments:aerobic composting,ectopic fermentation bed,and black film anaerobic pond treatments.The results showed that,during a 38-d growth period,the use of duck manure fertilizer significantly increased the content of soluble sugar and soluble protein in the Chinese cabbage.The black film anaerobic pond treatment with 30%substitution of duck manure fertilizer was the most effective in increasing the fresh weight of the Chinese cabbage as well as the contents of soluble sugar and soluble protein in the leaves.Compared with the pure chemical fertilizer treatment,the use of partially substituted duck manure fertilizer reduced the nitrate content in the Chinese cabbage by 31.4%to 41.1%.When 30%of duck manure fertilizer was substituted for chemical fertilizer,the levels of heavy metals As,Cr,and Cd in the aerial part of the Chinese cabbage did not exceed the safety limits of relevant food safety standards.However,when the proportions of duck manure fertilizer substituted after anaerobic composting treatment were 50%and 70%,the Pb content in the leaves exceeded the standards.Under the experimental conditions,the use of partially substituted duck manure fertilizer did not increase the heavy metal contamination level of the soil,but it increased the diversity of antibiotics,mainly florfenicol,in the soil.The results showed that the use of partially substituted duck manure fertilizer was beneficial for increasing the yield of Chinese cabbage,improving the contents of soluble sugar and soluble protein in Chinese cabbage,and reducing the nitrate content,and it had little effect on the content of heavy metals in the Chinese cabbage and soil.However,it increased the diversity of antibiotics in the soil.Overall,the use of the black film anaerobic pond treatment with 30%substitution of duck manure fertilizer is the best option.
国家科技期刊平台
NSTL
万方数据
