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| Chemical fertilizer input characteristics, pollution prevention and control measures in Beijing-Tianjin-Hebei region, China |
| Received:June 30, 2020 |
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| KeyWord:Beijing-Tianjin-Hebei;chemical fertilizer;pollution prevention and control;fertilization rate per unit area |
| Author Name | Affiliation | E-mail | | CHUAN Li-min | Institute of Agricultural Information and Economics, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China | | | ZHENG Huai-guo | Institute of Agricultural Information and Economics, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China | | | WANG Ai-ling | Institute of Agricultural Information and Economics, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China | ailw2000@126.com | | ZHAO Jing-juan | Institute of Agricultural Information and Economics, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China | | | YAN Zhi-hui | Institute of Agricultural Information and Economics, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China | | | QI Shi-jie | Institute of Agricultural Information and Economics, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China | |
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| Abstract: |
| To effectively alleviate pollution from agricultural non-point sources in Beijing, Tianjin, and Hebei(abbreviated as "BeijingTianjin-Hebei region"), it is necessary to evaluate the present situation and existing problems related to chemical fertilizer inputs in agriculture. The study analyzed the characteristics of the total inputs of different chemical fertilizers in Beijing, Tianjin, Hebei, as well as collectively in the Beijing-Tianjin-Hebei region during 2010-2018, and provided suggestions for reducing fertilizer use and increasing nutrient use efficiency. The results showed that the total quantity of chemical fertilizers applied(N+P2O5+K2O, converted into pure content) in the Beijing-Tianjin-Hebei region increased every year before 2014, and then decreased to 3.366 5×106 t thousand tons in 2018. Nitrogen fertilizers(N)and compound fertilizers were the two major fertilizer varieties used. In detail, the overall application of N and phosphorus fertilizers(P2O5)showed a declining trend, that of potassium fertilizers(K2O)decreased after 2013, and that of compound fertilizers exhibited an upward trend. The application quantities for N, P2O5, K2O, and compound fertilizers were 1.231 2×106, 2.634×105, 2.570×105, and 1.615 0×106 tons in 2018, respectively. The application rate of chemical fertilizer per unit area in Beijing increased from 358.45 kg·hm-2 in 2010 to 504.03 kg·hm-2(40.61%)in 2017. In 2018, it decreased to 485.58 kg·hm-2, a reduction of 18.45 kg·hm-2. The application rate of chemical fertilizer per unit area in Tianjin exhibited an obvious reducing trend, from 516.51 kg·hm-2 in 2010 to 370.16 kg·hm-2(28.33%)in 2018. The application rate of chemical fertilizers per unit area in the Hebei Province was maintained between 330.07~360.11 kg·hm-2, and the overall change was relatively negligible. The collective application rate of chemical fertilizer per unit area in the Beijing-Tianjin-Hebei region was 339.72~363.73 kg·hm-2, with an average of 348.66 kg·hm-2. Additionally, the application rates of chemical fertilizers per unit area in Beijing and Tianjin were significantly higher than the national average, while the value was close to the national average in the Hebei Province. In general, chemical fertilizer inputs in the Beijing-Tianjin-Hebei region tended to increase initially, and then reduced, and the application rates per unit area were high, especially in Beijing. There remains scope for downward adjustment. In view of the problems related to chemical fertilizer inputs in Beijing, Tianjin, and Hebei, this paper puts forth certain measures for reducing fertilizer application and increasing nutrient use efficiency. |
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