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黑土是黑龙江省的主要农业土壤。广泛分布于该省中部,大兴安岭东南侧及小兴安岭两侧的山前丘陵漫岗。松嫩河流上游谷地,三江低平原的西缘也有其分布。总面积1.18亿亩,约占全省农用土壤的二分之一。目前,除北部尚有近千万亩正在开发外。大部已耕垦数十年至百余年。盛产麦、豆、玉米等,素有“北大仓”之称。研究其肥力特性及垦后的肥力变化,对合理
Black soil is the main agricultural soil in Heilongjiang Province. Widely distributed in the central part of the province, southeastern Daxinganling and Xiaoxing’anling hills on both sides of the hills. The upper reaches of the Songnen River Valley, the lower reaches of Sanjiang also have their distribution. The total area of 118 million mu, accounting for about one-half of the province’s agricultural soil. At present, nearly 10 million mu are still being developed except in the north. Most have been cultivated for decades to hundred years. Abundant wheat, beans, corn, etc., known as “North warehouse”. It is reasonable to study its fertility characteristics and fertility changes after cultivation