甘蔗种植的化肥利用率及碳减排潜力分析

Analysis of Chemical Fertilizer Utilization Ratio and Carbon Emission Reduction Potential of Sugarcane Cultivating

化肥过量施用导致的碳排放对甘蔗生产和环境均具有负面影响。利用CD生产函数推导并测算了甘蔗种植的最优化肥施用量,对化肥利用率及碳减排潜力进行了研究。结果表明:在保障甘蔗产量的前提之下,甘蔗种植的化肥利用率为43. 99%,化肥减量施用的潜力较大。在化肥最优施用量条件下,甘蔗种植的碳减排潜力超过了50%,单位面积碳减排可达532. 32kg/hm2。基于此,加强对甘蔗种植碳排放和环境问题的重视程度,制定并推广适用于不同省份的科学施肥方案和扶持环境友好型肥料的发展与应用是提升化肥利用率和减少碳排放的可行对策。

Carbon emission caused by excessive application of chemical fertilizer had a negative effect on both sugarcane production and environment. In this paper,the CD production function was used to derive and measure the optimal fertilizer application rate of sugarcane planting,and the fertilizer utilization rate and carbon emission reduction potential were studied. The results showed that： On the premise of guaranteeing the sugarcane yield,chemical fertilizer utilization ratio of the sugarcane cultivating was 43. 99% with great potential for reduced application of chemical fertilizer. When applying the optimal dosage of chemical fertilizer,carbon emission reduction potential of the sugarcane cultivating was above 50%,and the carbon emission reduction per unit area could reach 532. 32 kg/hm^2. According to these,strengthening the emphasis on carbon emissions from sugarcane planting and environmental issues,developing and promoting scientific fertilization programs for different provinces,and supporting the development and application of environmentally friendly fertilizers were feasible measures to increase the fertilizer utilization and reduce the carbon emissions.