开篇的话:黑土地是地球上最珍贵的土壤资源,也是大自然给予人类得天独厚的宝藏。我国东北黑土区是世界上仅有的三大黑土区之一,是我国粮食的主产区,商品粮年产量占全国总量30%,有中国粮食生产“稳压器”之称。我省处于东北地区黑土带的核心区域,黑土区总面积为45.46万平方公里,占东北黑土区的50%。黑土带土壤肥沃,主要以黑土、草甸土、黑钙土和白浆土为主,有机质含量大约是 Opening words: the black land is the most precious soil resources on earth, but also the unique nature of human beings to the treasure. China’s northeast China’s black soil area is the only one of the three major black soil areas in the world, is China’s main producing areas of grain, the annual output of commercial grain accounted for 30% of the national total, with China’s grain production “regulator ” said. The province is located in the northeastern region of the black belt of the core area, the total area of ​​black soil area of ​​454,600 square kilometers, accounting for 50% of northeastern China black soil area. Black soil with fertile soil, mainly in black soil, meadow soil, chernozem and white soil mainly organic matter content is about