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| Evaluation of land absorption capacity for livestock and poultry waste in Yunnan Province and development prospect for fertilizer utilization |
| Received:September 24, 2021 |
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| KeyWord:livestock and poultry waste;land absorption capacity;commercial organic fertilizer;fertilizer utilization |
| Author Name | Affiliation | E-mail | | DENG Yaqin | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | WANG Yuyun | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | LI Lan | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | ZHAO Bing | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | ZHANG Yong | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | MA Liting | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | | | XU Zhi | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China | xuzhi9910@126.com |
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| Abstract: |
| Based on the livestock and poultry breeding data in Yunnan Province in 2019, this study estimated the production of livestock and poultry waste pollution in Yunnan Province, including the method of returning waste to the field and the form of land use, to assess the absorption capacity of land for livestock and poultry waste pollution. The potential for utilization of livestock and poultry waste fertilizer was evaluated based on the current status of organic fertilizer production in Yunnan Province and the demand for development of agriculture characteristic of plateaus. The results showed that the adjustment of planting methodology could increase the capacity of land to absorb the direct return of feces. Returning livestock and poultry waste to the field by composting could further increase the absorption capacity of the land. The technological level of organic fertilizer production in Yunnan Province was relatively low and its standardization degree was low. Further standardization and improvement in the technology level of the organic fertilizer industry might be an important mean to improve the utilization efficiency of livestock and poultry waste resources in Yunnan Province. The potential for composting livestock and poultry waste into organic fertilizer in Yunnan Province was approximately 35 440 000 t, and the estimated output value and profit are 28.35 billion yuan and 4.13 billion yuan, respectively. Combined with the need for development of agriculture suitable to the highland characteristics of Yunnan Province, composting of livestock and poultry waste into biological organic fertilizer, compound microbial fertilizer, and organic conditioner can be promoted, and is an important direction toward realizing the high value utilization of livestock and poultry waste. |
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