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| Study on the nutrient release characteristics and fertilizer efficiency of magnesium ammonium phosphate compost products |
| Received:February 23, 2020 |
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| KeyWord:magnesium ammonium phosphate compost products;soil column leaching;pot experiment;nutrient release characteristics;fertilizer efficiency |
| Author Name | Affiliation | E-mail | | LI Dan-yang | College of Resource and Environmental Science, China Agriculture University, Beijing 100093, China | | | QI Chuan-ren | College of Resource and Environmental Science, China Agriculture University, Beijing 100093, China | | | WEI Ya-nan | College of Resource and Environmental Science, China Agriculture University, Beijing 100093, China | | | LI Guo-xue | College of Resource and Environmental Science, China Agriculture University, Beijing 100093, China | ligx@cau.edu.cn |
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| Abstract: |
| Release characteristics of nitrogen and phosphorus nutrients and fertilizer efficiency of magnesium ammonium phosphate compost products(MAPC)were studied. For the purpose, soil column leaching experiment was employed, and a pot experiment was conducted to assess the effects of the fertilizer efficiency on canola. Three fertilizers were used in the experiment:common chemical fertilizer(CCH), common compost(CCO), and magnesium ammonium phosphate(MAP), and the obtained results were compared. The results showed that during the entire leaching process, the concentrations of both total nitrogen(TN)and total phosphorus(TP)in the leachate treated with CCH and MAPC were higher than those in the other treatments. As a slow-release fertilizer, compost could improve the nutrient release of MAP and the nutrient release rate under CCO treatment was the lowest. Moreover, after the last leaching(i.e. the fifth), the TN and TP concentrations in the fertilizers were in the following order:CCH > MAPC > MAP > CCO. After 18 days of the pot experiment, it could be observed that canola grew rapidly. Compared with the control treatment, the MAP and MAPC fertilizers significantly improved the plant height and biomass of canola. At the end of the pot experiment(45 days), the biomass of canola under CCH, CCO, MAP, and MAPC treatments was 14.8, 4.8, 20.5, and 16.0 times higher than that under the control treatment, respectively. Furthermore, compared with the control treatment, the MAP fertilizer had a significant effect on improving the nutrient content of canola, and the TN and TP contents were increased by 2.24 g·kg-1 and 1.54 g·kg-1, respectively. In conclusion, four kinds of fertilizers selected for this study were beneficial in promoting the growth and development of canola. The fertilizer efficiency of the MAP and MAPC fertilizers was better than that of the CCH and CCO. Nitrogen and phosphorus could be conserved partially via struvite crystallization during composting and the fertilizer efficiency of compost product was improved. |
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