黑龙江省绥化地区植被区划

The Vegetation Division in The District Suihua of Heilongjiang Province

绥化地区位于黑龙江省中部。境内有低山丘陵、台地及平原三种地貌类型。属中温带湿润及半湿润地区。土壤类型有暗棕壤、黑土、黑钙土、盐渍土及风沙土。境内生态条件经向分异规律明显。植被区划原则首先是综合性原则,但也要遵循等级性原则及主导性原则。据此将绥化地区植被划分四个植被地区:I温带湿润针阔混交林植被地区;Ⅱ温带偏湿半湿润森林灌丛草甸植被地区;Ⅲ温带半湿润草甸草原植被地区;Ⅳ温带偏干半湿润草甸草原植被地区。在四个植被地区内划分七个植被地带,每个植被地带详细论述了范围、面积、生态条件、植物种属组成、区系特征、植被类型、改良利用方向。

The district of Suihua lies middle of Heilongjiang province.Within thedistrict there are low mountains,hills,tablelands and part of the Songnenplain in the southwest.This area can be classified to the moist and semi-moist region of the moderate temperate zone.The types of the soil in this re-gion are:the dark brown forest soil,black soil,saline soil,sandy soil madeby wind.The ecological condition in this area has a law of obvious merid-ional discrepancy.In the division of vegetation,we should,first of all,abide by the prin-ciple of synthesis.However,the principle of grade and that of primary shouldalso be followed.Thus,the vegetation in the district of Suihua can be divid-ed into four vegetational regions:1 The vegetational region with the needle-broad-leaved mixed forest ofmoisture in the temperate zone:2 The vegetational region with the forests,bushwoods and meadow ofinclined moisture and semi-moisture in the temperate zone:3 The vegetational region with the semi-moist meadow and meadowcover in the temperate zone:4 The vegetational region with the meadow steppe of inclined aridityand semi-moisture in the temperate zone.Those four regions are then subdivided into seven vegetation belts and inthe description of each belt,we expound in details the range,the area,theecological condition,the constitution of each vegetational forms and the flo-ristic features,the vegetational types and the orientation of them beingimproved and exploited.