Journal of Ecology and Rural Environment ›› 2021, Vol. 37 ›› Issue (6): 714-723.doi: 10.19741/j.issn.1673-4831.2020.0516

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Bearing Capacity of Livestock and Poultry Manure in Huang-Huai-Hai Region Based on Nitrogen and Phosphorus Farmland Utilization

CHEN Guang-yin1,2, CAO Hai-nan2, DING Tong-gang2, HUO Wei-jie2, PAN Yi-xin2   

  1. 1. Anhui Engineering Laboratory of Soil and Water Pollution Control and Remediation, Wuhu 241002, China;
    2. College of Ecology and Environment, Anhui Normal University, Wuhu 241002, China
  • Received:2020-06-24 Online:2021-06-25 Published:2021-06-24

Abstract: To evaluate the land bearing capacity of livestock and poultry (LP) manure in Huang-Huai-Hai region, the total amount of LP manure, nitrogen (N) and phosphorus (P) load of LP manure in farmland, and environmental risk index of LP breeding in Huang-Huai-Hai region were calculated using the handbook of "Pollutant Generation Coefficient and Discharge Coefficient in Livestock and Poultry Breeding Industry" and the data of national and local statistical yearbooks in 2018. The land bearing capacity and development potential of LP manure in this region were then estimated based on the N and P utilization in farmland. The results show that, (1) in 2017, the amount of livestock and poultry manure in Huang-Huai-Hai region was 314.341 8 million tons, including TN 1.729 0 million tons and TP 0.311 0 million tons; the livestock and poultry manure, N and P load in farmland were 12.00 t·hm-2, 66.05 kg·hm-2and 11.88 kg·hm-2, respectively. (2) Farmland load of livestock and poultry breeding pollutants in most areas of Huang-Huai-Hai region were at a low level, as livestock and poultry manure load in 81.82% of cities, N load in 70.91% of cities, and P load in 78.18% of cities were less than 15 t·hm-2, 75 kg·hm-2, and 15 kg·hm-2, respectively. (3) According to the environmental risk level of livestock and poultry breeding, Beijing belonged to the Cut-breeding area; Tianjin, Qinhuangdao and Yantai belonged to Strictly-controlled area; Weihai, Rizhao, Dezhou, Binzhou, Luoyang, Xuchang and Luohe belonged to Proper-control area; Xingtai, Anyang, Shangqiu, Zaozhuang, Bozhou, Huaibei, Xuzhou, Lianyungang, Yancheng and Huai'an belonged to Key-development area; and the others belonged to General-development area. (4) Land bearing capacity in the whole Huang-Huai-Hai region based on N and P utilization in farmland was 422.627 0 million pig equivalent, and the livestock and poultry breeding potential value was 264.698 2 million pigs equivalent; about 0.663 4 million pig equivalent should be cut in Beijing, while the development potential of livestock and poultry manure in Tianjing, Anhui, Jiangsu, Hebei, Henan and Shandong were 1.045 6, 35.691 4, 36.917 7, 41.899 0, 83.712 6 and 66.095 3 million pigs equivalent, respectively.

Key words: Huang-Huai-Hai region, livestock and poultry manure, farmland load, nitrogen, phosphorus, environmental risk index

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