近40年黑龙江省两大平原土壤有机质时空变化规律

杨贺平, 赵小静, 孙江军

Spatiotemporal changes of soil organic matter in the Songnen and Sanjiang plains of Heilongjiang Province over 40 years

YANG He-Ping, ZHAO Xiao-Jing, SUN Jiang-Jun

图2 黑龙江省两大平原土地利用现状

Fig.2 Situation of land use in the two great plains of Heilongjiang Province