Zhang Jingyu, Wang Bangwen, Xia Xiaolin, et al. Spatial and Temporal Distribution Characteristics of Land Carrying Capacity of Livestock and Poultry Manure in Anhui Province[J]. Bulletin of Soiland Water Conservation, 2021, 41(3): 357-364.
DOI:
Zhang Jingyu, Wang Bangwen, Xia Xiaolin, et al. Spatial and Temporal Distribution Characteristics of Land Carrying Capacity of Livestock and Poultry Manure in Anhui Province[J]. Bulletin of Soiland Water Conservation, 2021, 41(3): 357-364. DOI: 10.13961/j.cnki.stbctb.2021.03.046.
Spatial and Temporal Distribution Characteristics of Land Carrying Capacity of Livestock and Poultry Manure in Anhui Province
[Objective] The potential pollution risks from livestock and poultry manure on farmland soil and the environment were analyzed in order to provide a scientific basis for non-point source pollution control and resource utilization. [Methods] Livestock and poultry breeding data and crop yield from Anhui Province from 2009 to 2018 were quantitatively analyzed in conjunction with regional crop nutrient demand and nutrient supply from livestock and poultry manure. Combined with existing research results
the spatial and temporal evolution characteristics of the land carrying capacity of livestock and poultry were studied. [Results] The quantity of livestock manure increased from 6.19×107 tons in 2009 to 7.09×107 tons in 2015
and then decreased to 5.00×107 tons in 2018. Pig urine emissions were the largest and cattle urine emissions were the smallest. The discharge of livestock and poultry manure and the supply of nitrogen and phosphorus in the entire province were both higher in the north and lower in the south. The proportion of different livestock manure in the nitrogen supply was balanced
but there was a large difference in phosphorus. The risk of livestock and poultry pollution over the entire province was mainly concentrated in Hefei
Huangshan
and Xuancheng cities located in the central and southern areas of Anhui Province. The land carrying capacity index of the entire province decreased in 2018
and there was still a certain accommodation space for livestock and poultry manure. [Conclusion] Due to pollution risks associated with livestock and poultry breeding in some areas in Anhui Province
it is necessary to strengthen fertilizer application planning and structure adjustment in key areas in order to promote sustainable agricultural development.
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