黑龙江省嫩江地区的植被类型及其利用和改良

嫩江地区植物种类较为丰富,但无特有种,是周边植物区系成分相互交错的地带,以中生、中旱生植物占主要优势。草甸草原是该地区的地带性植被。全区植被类型可划分为3个植被型、13个群系、31个群丛。该地区草原面积较大,是我国最好的天然草场之一。近年来由于种种原因,草原面积日益缩小,植被覆盖率下降,优良牧草减少,产草量逐年降低。本文就加强草原管理、防治草原退化提出若干建议,为实现草原畜牧业现代化提供科学依据。

THE VEGETATIONAL FORMS OF NEN RIVER REGION IN HEILONGJIANG PROVINCE AND ITS UTILIZATION AND IMPROVEMENT

The vegetative cover of the Nen River region is comparativly rich, but there is no particular plant species in it. It consists mainly of mesophytes and meso-xerophytes. The plant components of the flora round the region crisscross in the region. The vegetational zone is a type of meadow-steppe. The vegetational form may be divided into 3 vegetation types, 13 formations and 31 associations.There are a considerable vast areas of range in this region, and it is one of the best rangelands of the country.In recent years the range deteriorated,the plant coverage, the number of best herbages, the yield of grass and the area of range decreased because of varieties of reasons. In this article some proposals were put forward for improving the range management and preventing range deterioration.