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| Farmland load of livestock manure in Liaohe River basin of Jilin Province based on the balance between planting and breeding |
| Received:May 20, 2021 |
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| KeyWord:livestock manure;balance between planting and breeding;farmland load;pollution risk;land carrying capacity |
| Author Name | Affiliation | E-mail | | HUANG Xin | College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China | | | ZHAO Xingmin | College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China | zhaoxingmin0704@163.com | | SU Wei | Jilin Province Academy of Environmental Science, Changchun 130012, China | | | ZHENG Yuxin | College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China | | | WANG Hongbin | College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China | | | WANG Yujun | College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China | |
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| Abstract: |
| The livestock husbandry industry has become an important part of agricultural non-point source pollution. To prevent agricultural pollution, the amount of livestock manure and farmland load were investigated in the Liaohe River basin of Jilin Province. The land carrying capacity of livestock manure was evaluated based on the balance between planting and breeding. The results showed that the amount of livestock manure reached 5.375 9 million t, and the average manure load was 5.43 t·hm-2·a-1 in the Liaohe River basin of Jilin Province in 2017. The greatest manure load of farmland in Liaoyuan City was 12.09 t·hm-2·a-1, while the average land carrying capacities of livestock husbandry were 131.39 kg·hm-2(based on N)and 20.65 kg·hm-2(based on P). Siping City had the lowest carrying capacity of land based on nitrogen(78.64 kg·hm-2). Liaoyuan City had the largest index in the risk assessment of livestock manure. The study found that Liaoyuan City had low risk of livestock manure pollution, and it was the area with higher contamination risks from the release of nitrogen and phosphorus, which posed a threat to the farmland environment. In addition, Siping City was at medium risk(based on N)and light risk(based on P), while Dongliao County was a low pollution risk area. The other cities were in a safe area, which had little effect on the farmland environment. |
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