海南省农地土壤畜禽粪便承载力和养殖环境容量分析

Analysis of Livestock Manure Carrying Capacity of Farmland Soil and Environmental Capacity for Livestock Cultivation in Hainan Province

依据2010年海南省畜禽养殖数据,采用排污系数法估算了畜禽粪尿排泄量,同时结合农地面积,分析评价了海南省农地畜禽粪便承载力现状,并计算了海南省畜禽养殖环境容量。结果表明,2010年海南省以猪粪当量计的农地土壤畜禽粪便负荷量平均值为10.33t/hm2,农地畜禽粪便承载力的预警值平均值为0.20,级别为Ⅰ级,对环境无污染风险,但海口市和东方市预警值分别为0.51和0.45,对环境稍有污染;2010年海南省最大畜禽饲养容量为5237.35万头猪标准动物,剩余饲养容量为2643.17万头猪标准动物,但海口市和东方市已超出当地最大畜禽饲养容量,应适当控制畜禽饲养规模。

This arti the method of excretion coe cle estimated the amount of livestock manure in Hainan province in 2010 using fficient, based on breeding data of the published yearbook of Hainan province. Livestock manure carrying capacity of cultivated land in Hainan province was calculated and evaluated based on the effective area of cultivated land. In addition, the environment capacity for livestock in Hainan province was also estimated. The results showed that the average livestock manure carrying capacity of cul- tivated land was 10.33 t. hm2 in Hainan province in 9,010, and the average livestock manure loading early- warning value of cultivated land was 0.20, which could be sorted into Grade I of the overall early-warn- ing, meaning＂no environmental pollution caused by livestock manure＂. But the averaged livestock manure loading early-warning value of Haikou city and Dongfang country was 0.51 and 0.45 respectively, meaning ＂slight environmental pollution caused by livestock manure＂. In 2010, the largest environmental capacity for livestock in Hainan province was 52. 3735 million pigs as standard animal. However the amount of live- stock in Haikou city and Dongfang country were beyond the local environmental capacity for livestock, lo- cal government should decrease the amount of livestock.