图8. 不同作物的有机质碳当量变化范围^[31,32]
* 作物收获后秸秆、叶子、谷壳等运送出田Straw, leaves, hulls, etc. are transported out of field after harvesting
** 深绿色表示腐殖质增加型作物,浅绿色为腐殖质消耗型作物 Dark and light greens representing humus-increasing and -consuming crops respectively

Fig. 8. Humus equivalent (Heq) of different crops