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| The Effects of Different Sewage Sludge Application on Rapeseed Growth and Quality Under High Fertilizer Input |
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| KeyWord:urban sludge; rape; fresh weight; quality |
| Author Name | Affiliation | | LI Dong-jie | College of Resources and Environmental Sciences, Agricultural University of Hebei
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences
Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences | | LIU Shu-qing | College of Resources and Environmental Sciences, Agricultural University of Hebei | | LI Peng | Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences
Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences | | ZHAO Tong-ke | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences | | ZHANG Cheng-jun | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences | | ZHANG Li-guang | College of Resources and Environmental Sciences, Agricultural University of Hebei |
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| Abstract: |
| Sewage sludge contains organic matter, nitrogen, phosphorus and other plant nutrient elements. As a result, it may modify the soil properties and improve plant growth. The objective of this study was to examine if different sewage sludge applications, each of which constitutes high fertilizer input, affects rapeseed growth, vitamin C, nitrate, total nitrogen, total phosphorous and total potassium. Pot experiments were conducted with five treatments, replicated 4 times. The treatments included control without fertilization（CK）, conventional chemical fertilization（CF）, sewage sludge amount with phosphate equivalent to 70, 100, and 130% of conventional chemical fertilizer application（SL1, SL2, SL3, respectively）. Results indicated the substitution of chemical fertilizer with sewage sludge based on phosphorous contents increased the yield by 10% to 55%, decreased the nitrate content in plant by 10% to 21% and moderately increased root biomass, as compared with the conventional fertilization treatment. However, effects on rapeseed vitamin C, total nitrogen and potassium contents were not obvious. The results obtained from this study indicated that sewage sludge improved the yield and quality of rapeseed. |
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