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海南岛1988—2018年畜禽粪尿氮磷负荷量及环境效应
丁尚1(),付阳2,郭浩浩1,宋晨阳1,李博玲3,赵洪伟1()
Nitrogen and Phosphorus Loads and Their Environmental Effects of Animal Manure in Hainan Island from 1988 to 2018
DING Shang1(),FU Yang2,GUO HaoHao1,SONG ChenYang1,LI BoLing3,ZHAO HongWei1()

图2. 1988—2018年海南岛单位耕地面积总氮和总磷负荷
“—”表示总氮施用限量标准,“”表示总磷施用限量标准

Fig. 2. Loads of total nitrogen and phosphorus in unit cultivated land of Hainan Island from 1988 to 2018
“—” means the limited amount of total nitrogen application, “” means the limited amount of total phosphorus application。下同 The same as below