胁迫引起作物大幅度减产 Ikg per hectare) ord yield Average yield Abiotic losses as a Crop (kg per hectare) (kg per hectare) Biotic Abiotic percentage of record yield Com 1930 460 19521270 658 Wheat 14500 1880 72611900 821 ocean 7390 1610 66 5120 693 Sorghum 20,100 2830 10511620 Oat 10600 924 7960 751 114 2050 754 Potato 94100 28300 175090 Sugar beet￥10 4260 100030 507 Biotic factors include diseases, insects, and weeds胁迫引起作物大幅度减产