CAJ | 학술논문

对石羊河上游各类草地群落16种主要植物种群特征与其自身初级生产力之间的关系进行了探讨.结果表明:草地群落16种主要植物密度与初级生产力存在相关性,其中蒿草、针茅等7种达到极显著水平(0.95<r<0.99,P<0.01),苔草、扁穗冰草等7种达到显著水平(0.89<r<0.94,P<0.05),冷蒿、骆驼蓬与生产力的相关性不显著,r分别为0.790 1、0.671 3(P>0.05);草地群落植物盖度与生产力关系的研究中,冷蒿、醉马草等5种植物呈显著性相关(0.84<r<0.95,P<0.05),其余都呈极显著性相关(0.96<r<1,P<0.01),说明植物群落初级生产力随着植物盖度的增加而增大;分析各类草场主要植物种群密度和盖度与生产力之间的相关性,发现盖度与生产力的显著性普遍高于密度与生产力的水平,即盖度与生产力的拟合函数关系更能贴近生产实际,更方便于农牧民判断草地实际生产力,对保护草地、可持续利用草地具有十分重要的意义.
대석양하상유각류초지군락16충주요식물충군특정여기자신초급생산력지간적관계진행료탐토.결과표명:초지군락16충주요식물밀도여초급생산력존재상관성,기중호초、침모등7충체도겁현저수평(0.95<r<0.99,P<0.01),태초、편수빙초등7충체도현저수평(0.89<r<0.94,P<0.05),랭호、락타봉여생산력적상관성불현저,r분별위0.790 1、0.671 3(P>0.05);초지군락식물개도여생산력관계적연구중,랭호、취마초등5충식물정현저성상관(0.84<r<0.95,P<0.05),기여도정겁현저성상관(0.96<r<1,P<0.01),설명식물군락초급생산력수착식물개도적증가이증대;분석각류초장주요식물충군밀도화개도여생산력지간적상관성,발현개도여생산력적현저성보편고우밀도여생산력적수평,즉개도여생산력적의합함수관계경능첩근생산실제,경방편우농목민판단초지실제생산력,대보호초지、가지속이용초지구유십분중요적의의.
The relationships between population characteristics and its primary productivities of sixteen main grass species of grassland communities in the upper Shiyang river were researched. The results indica-ted that; (1)A correlation in certain degree was found between density and primary productivity of sixteen main grass species. Among them, the correlation of seven species was significant at 0. 01 level (0. 95<r<0. 99,P<0. 01) ,other seven species at 0. 05 level (0. 89<r<0. 94,P<0. 05). The correlation of the rest two species (Artemisia frigida and Peganum harmala) was not significant(F>0. 05); (2) A correlation was also found between coverage and productivity of the sixteen grass species. Five species was significant at 0. 05 level (0. 84<r<0. 95,P<0. 05),the rest at 0. 01 level (0. 96<r<1 ,P<0. 01). The correlation meant primary productivity increased along with coverage; (3)The correlation between coverage and productivity was higher than that between density and productivity at large. So that the function relation between cover-age and productivity was more practicable in production. This made it more convenient for the herdsman to estimate the real productivity,and had a great meaning for conserving the grassland and utilizing it continu-ally.