松嫩平原碱斑进展演替实验群落的比较分析  

COMPARISON ANALYSIS ON THE EXPERIMENTAL COMMUNITIES DURING PROGRESSIVE SUCCESSION ON ALKALINE PATCHES IN THE SONGNEN PLAIN OF CHINA

作　　者：杨允菲[1,2] 郑慧莹[1,2] 

机构地区：[1]东北师范大学草地研究所 [2]中国科学院植物研究所

出　　处：《植物生态学报》1998年第3期214-221,共8页Chinese Journal of Plant Ecology

基　　金：国家自然科学基金

摘　　要：本文对松嫩平原碱化草地碱斑上建植的羊草（Ｌｅｙｍｕｓｃｈｉｎｅｎｓｉｓ）群落、星星草（Ｐｕｃｃｉｎｅｌｉａｔｅｎｕｉ－ｆｌｏｒａ）＋羊草群落、星星草群落、野大麦（Ｈｏｒｄｅｕｍｂｒｅｖｉｓｕｂｕｌａｔｕｍ）群落、虎尾草（Ｃｈｌｏｒｉｓｖｉｒｇａｔａ）群落５个实验群落的土壤化学特性、种类组成、生产力，以及各种群的营养繁殖特征作了比较分析。结果表明，５个实验群落在０～３０ｃｍ的土壤均为ｐＨ值＞１０，仍处于碱土生境，各群落均随着土层深度的增加电导率呈递增趋势，有机质含量呈递减趋势。实验群落土壤电导率与ｐＨ值之间呈极显著的正相关，与土壤有机质之间呈极显著的负相关。经过５年种子的自然传播和营养繁殖，虎尾草在各群落中广泛生长，羊草已在星星草群落和野大麦群落中定居，星星草已侵入羊草群落中。群落总生物量以野大麦群落最高，羊草群落最低。各群落冬性芽和冬性蘖的数量远远多于现存种群数量。５个群落均将沿着进展演替方向继续发展。This paper analyses,in a comparative way,the chemical properties of the soil,the species compositions,the productivities and the characters of vegetative propagation every population in five experimental communities which were Leymus chinensis community,Puccinellia tenuiflora+L.chinensis community,P.tenuiflora community, Hordeum brevisubulatum community and Chloris virgata community on the alkaline patches in the alkalized meadow in the Songnen Plain of China.The results show that they were still the conditions of alkaline soils with pH>10 in the 0～30 cm soils in the five communities.The electrical conductivities all have a progressive increase tendency and the contents of organic matter all have a progressive tendency along with the increase of the soils depth of every experimental communities.There were a most significant positive correlation between the electrical conductivities and the pH values,and a most significant negative correlation between the electrical conductivities and the contents of organic matter in the soils of the experimental communities.By natural dispersal of the seed and vegetative propagation for five years,C.virgata had widely grown in every community,L.chinensis had settled down in the P.tenuiflora community and H.brevisubulatum community,P.tenuiflora had intruded into the L.chinensis community.The total biomass were the highest in the H.brevisubulatum community,and the lowest in the L.chinensis community among five experimental communities.The number of winterness buds and winterness tillers was far larger than the number of the stand populations in every experimental community.The five communities would keep on developing along direction of progressive succession.

关 键 词：盐碱植物 群落 碱斑 土壤化学 生物量 营养繁殖 

分 类 号：Q948.113[生物学—植物学]