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黑钙土是黑龙江省西部地区的主要土类.除甘南县至龙江县呈一条狭长带状分布着普通黑钙土之外,在松嫩平原的平岗上也有零星的分布,其亚类碳酸盐黑钙土主要分布于松嫩平原的西南部、而在松嫩冲积、湖积平原地带大部分是草甸黑钙土.因此,解决西部黑钙土的造林技术问题,是防止“小老树”,营造速生丰产林的一项重要工作. 一、生物气候的特点黑钙土是在一定气候条件下发育而成的.我省黑钙土的分布区是属于温凉半干旱的气候,年平均气温2-4℃,年降水量350-400毫米.干燥度1.0-1.4之间.夏季温度比较高,七月份平均气温22℃,降雨量大,占全年降水量的百分之七十以上;冬天
Chernozem is the main soil in the western Heilongjiang Province, except Gannan to Longjiang County, an elongated strip-shaped distribution of ordinary chernozem, in Songnen Plain Ping Gang also sporadic distribution, its sub-category Carbonatite is mainly distributed in the southwest of Songnen Plain, while in the Songnen alluvial and lacustrine plains, most of the meadow chernozem soil.Therefore, to solve the problem of afforestation in the western Chernozem is to prevent “ Small tree ”, to create a fast-growing and high-yielding forest an important work.A, the characteristics of the biological climate Chernozem is developed under certain climatic conditions.Culture of chernozem in our province are part of the semi-arid and cool Climate, the annual average temperature of 2-4 ℃, the annual rainfall of 350-400 mm. Dryness of 1.0-1.4 between the summer temperature is relatively high, the average temperature in July 22 ℃, rainfall, accounting for the annual precipitation percentage Seventy or more; winter