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一、自然概况及其对造林的影响黑龙江省西部及西南部松嫩平原有大面积苏打盐渍土,自东经122°50′—126°20′,北纬45°50′—48°50′,面积约五百余万公顷。本地区大部分在海拔140—200米间,地形平坦,间有漫岗及小形沙丘,其相对高度仅数米。低地有碱泡子,面积十余公顷至百余公顷不等,亦有小面积积水地。境内河流甚少,绝大部分为一望无际的草甸草原,其中一部分垦为农田,一部分为牧场及刈草地。
I. General Situation of Nature and Its Impact on Afforestation Large-area soda saline soil has been found on the Songnen Plain in the west and southwest of Heilongjiang Province. From longitude 122 ° 50’-126 ° 20 ’east longitude and 45 ° 50’-48 ° 50’ north latitude, An area of about five million hectares. Most of the region at an altitude of 140-200 meters between the flat terrain, between Man Kong and small sand dunes, the relative height of only a few meters. Alkali lowlands, covering an area of more than ten hectares ranging from 100 hectares, there is also a small area of water. The territory of the river is very small, most of the endless meadows prairie, part of which reclaimed farmland, part of the pasture and mowing.