[ 1 ] Zhang W L, Wu S X, Ji H J, et al. Estimation of agricultural nonpoint source pollution in China and the alleviating strategies I. estimation of agricultural non-point source pollution in China in early 21 century [J]. Scientia Agricultura Sinica, 2004, 37(7): 1008–1017. Chinese. link1

[ 2 ] Wu S X. The spatial and temporal change of nitrogen and phosphorus produced by livestock and poultry & their effects on agricultural mon-point pollution in China [D]. Beijing: Chinese Academy of Agricultural Sciences (Doctoral dissertation), 2005. Chinese. link1

[ 3 ] Yan J, FE de Buisonjé, Melse R W. White paper—Livestock manure treatment technology of the Netherlands and situation of China [R]. Wageningen: Wageningen Academy of Animal Science, 2017. Chinese.

[ 4 ] Bai Z, Ma L, Jin S, et al. Nitrogen, Phosphorus, and Potassium flows through the manure management chain in China [J]. Environmental Science Technology, 2016, 50(24): 13409–13418. link1

[ 5 ] Department of Nature Environmental Conservation, Ministry of Environment Protection of the PRC. The pollution investigation and prevention countermeasures on national large-scale livestock and poultry breeding [M]. Beijing: China Environmental Science Press, 2002. Chinese. link1

[ 6 ] Wang F H, Ma W Q, Dou Z X, et al. The estimation of the production amount of animal manure and its environmental effect in China [J]. China Environmental Science, 2006, 26(5): 614–617. Chinese. link1

[ 7 ] Liu X Y, Li S T. Temporal and spatial distribution of nutrient resource from livestock and poultry feces and its returning to cropland [J]. Transactions of the Chinese Society of Agricultural Engineering, 2018, 34(4): 1–14. Chinese. link1

[ 8 ] Research Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agriculture Science, Nanjing Institute of Environmental Sciences, MEP. Booklet of excreta factor in animal farming, the first national census of pollution sources [Z]. 2009. Chinese.

[ 9 ] Dong H M, Zhu Z P, Huang H K, et al. Pollutant generation coefficient and discharge coefficient in animal production [J]. Transactions of the Chinese Society of Agricultural Engineering, 2011, 27(1): 303–308. Chinese. link1

[10] He Y C. Build the field fertilizer bank, compost high quality organic fertilizer [J]. Scientia Agricultura Sinica, 1959 (24): 842– 843. Chinese.

[11] Ma C B, Shi M Y. Status and analysis of utilization of livestock and poultry manure resources in China [J]. China Agricultural Technology Extension, 2016, 32(11): 7–11. Chinese. link1

[12] Xuan M, Xu Z C, Wu G Y, et al. Analysis of utilization of fecal resources in large-scale livestock and poultry breeding in China [J]. Journal of Agricultural Resources and Environment, 2018, 35(2): 126–132. Chinese. link1

[13] Zhang S F. Technology of feed production and utilization using livestock and poultry manure [J]. Feed Research, 2016 (17): 48–50. Chinese. link1

[14] Oenema O, van Liere L, Plette S, et al. Environmental effects of manure policy options in the Netherlands [J].Water Science & Technology, 2004, 49(3): 101–108. link1

[15] Wu L F, Ouyang Z, Xie X L. Nitrogen and Phosphorus balance of cropland at regional scale for integrated crop-livestock farming system in two different areas [J]. Journal of Natural Resources, 2011, 26(6): 943–954. Chinese. link1

[16] Shen G X, Qian X Y, Liang D T, et al. Research on suitable area for cropland application of animal manure based on nutrients management of nitrogen and phosphorus [J]. Transactions of the Chinese Society of Agricultural Engineering, 2006 (S2): 268– 271. Chinese. link1