石拐区3种人工林林下植物多样性研究

STUDY ON UNDERBRUSH DIVERSITY UNDER THREE KINDS OF PIANTED FOREST IN SHIGUAI AREA

本文以包头市石拐区山地人工油松林、沙棘林、油松沙棘混交林为对象,运用重要值、多样性、丰富度、均匀度等指标对林下植物多样性进行研究,结果表明:(1)油松沙棘混交林、沙棘林、油松林的林下植物科、种的数量均比ck增加,不同树种组成对林下植物重要值影响不同,重要值由ck和沙棘林的以多年生禾本科和菊科占优势,变化为油松林和油松沙棘混交林中以唇形科、豆科和多年生禾本科占优势;(2)油松和沙棘混交,使林下植物多样性提高。

In this article,through the investigation of planted forest type place around Shi Guai mountainous area,by use of the importantval、diversity、 richness、evennes and other indicators,study on diversity of plant community under Pinus tabulaeformis forest、Hippophae rhamnoides forest、Pinus tabulaeformis and Hippophae tabulaeformis forest,In the result ：（1） the vegetation species number under Pinus tabulaeformis and Hippophae tabulaeformis forest、Hippophae rhamnoides forest、Pinus tabulaeformis forest compare to ck increase 1to4 kinds,The important value gets the advantage by ck and Hippophae rhamnoides forest by the perennial gramineae and the compositae,change for Pinus tabulaeformis fores and Pinus tabulaeformis and Hippophae tabulaeformis forest by the orthodon,the leguminosae and the perennial gramineae get the advantage;（2）Pinus tabulaeformis and Hippophae tabulaeformis mix the junction,causes underbrush diversity enhancement.