야초지 식생의 Ordination과 토양환경구배와의 관계에 관한 연구

Abstract

This study is to find out the correlation between plant groups and environmental gradient in the native grassfild near Kang Nam Express Terminal from August 26 through september 15, 1977 for samples collection. The correlations among plant species were calculated by using the method of ordination, and the various relationships among soil environmental gradients were grouped by means of correlation coefficient. As a result, both the species and the soil environmental factors could be subdivided into four groups, and the four groups of the native grassfield were turned out to be correlated with the four groups of soil environmental factors. The first plant group(Panicum dichotomiflorum, Chenopodium album, Bidens frondosa, Humulus japonicus, Echinochloa macrovotbi, Rorippa sublyrata, Polygonum longisetum, Rumex japonicus, Alopeculus amurensis, Potentilla fragarioides, Centipeda minima, Beckmannia erucaeformis) was formed in the relve 1-10 reagions, where organic matter by Turin's method, Total N, Exchange Ca and total of Exchange K, Na, Mg, Ca were abundent. The second plant group(Digitaria sanguinalis, Paltulaca oleracea, Echinochlea macrocorvi, Cyperus amuricus) was formed in the relve 11-18 reagions, where Exchange Ca and total of Exchange K, Na, Mg, Ca were a little but Exchange Al and sand were aburdent. In relv'e 19-20 reagions, with much of Exchange Ca, total of Exchange K, Na, Mg, Ca, pH and a little Exchange Al, was found the third plant group(Pycreus sanguinolentus, Cyperus amuricus, Luawigia prostrata, Echinochloa echinata, Polygonum thunbergii, Salix glandulosa seedling) The fourth plant group (Cassia nomame, Polygonum perfoliatum, Setaria viridis, Glycine ussuriensis, Lactuca indica, setaria glauca, Artemisia capill airis, Artemisia asiatica, Calamagrostis arundinacea, Kummerowia striata, Denothera odorata, Artemisia japonica, Carey laceolata) was formed in relv'e 21-25 reagions, where organic matter by loss on ignition, Exchange Mg and Maximum water holding capacity were abundent but sand was a little. And than, the vegetation group were formed by using the method of ordination, could be found out the reason by grouping environmental factors of soil, by means of correlations coefficient. Exchange Ca and total of Exchange K, Na, Mg, Ca were abundent. The second plant group(Digitaria sanguinalis, Paltulaca oleracea, Echinochlea macrocorvi, Cyperus amuricus) was formed in the relve 11-18 reagions, where Exchange Ca and total of Exchange K, Na, Mg, Ca were a little but Exchange Al and sand were aburdent. In relv'e 19-20 reagions, with much of Exchange Ca, total of Exchange K, Na, Mg, Ca, pH and a little Exchange Al, was found the third plant group(Pycreus sanguinolentus, Cyperus amuricus, Ludwigia prostrata, Echinochloa echinata, Polygonum thunbergii, Salix glandulosa seedling) The fourth plant group (Cassia nomame, Polygonum perfoliatum, Setaria viridis, Glycine ussuriensis, Lactuca indica, setaria glauca, Artemisia capill aris, Artemisia asiatica, Calamagrostis arundinacea, Kummerowia striata, Denothera odorata, Artemisia japonica, Carey laceolata) was formed in relv'e 21-25 reagions, where organic matter by loss on ignition, Exchange Mg and Maximum water holding capacity were abundent but sand was a little. And than, the vegetation group were formed by using the method of ordination, could be found out the reason by grouping environmental factors of soil, by means of correlations coefficient.;본 연구는 ordination에 의한 식생의 구룹형성과 토양환경구배와의 관계를 밝히기 위하여 1977년 8월26일~9월 15일 동안 강남고속터미널(서울시 성동구 영동)주변의 비교적 종조성이 균질하다고 생각되는 야초지를 대상으로 이루어졌다. 야초지 식생의 ordination은 X²에 의하여 구룹으로 나누었으며, 토양환경구배는 상관계수에 의하여 구룹을 지었다. 조사결과 식생구룹(Fig2)과 토양구룹(Pig3)은 각각 4개의 구룹으로 구별되었으며, 식생의 구룹과 토양구룹 사이에는 상관관계가 있었으며 그 내용은 다음과 같다. 구룹1 : Turin's method에 의한 유기물, 질소, 치환성 Ca 및 치환성 K, Na, Mg, Ca의 합이 많은지역(relve´ 1-10)의 식생은, 개기장풀속, 명아주, 서양도깨비바늘, 한삼덩굴, 돌피, 개갖냉이, 개여뀌, 소리쟁이, 뚝새풀, 양지꽃, 중대가리, 개피, 구룹2 : 치환성 K, Na, Mg, Ca의 합이 적고, 치환성 Aℓ와 모래가 많은 지역 (relve´ 11~18)의 식생은, 바랭이, 쇠비름, 돌피, 방동산이, 구룹3 : 치환성 Ca와 치환성 K, Na, Mg, Ca의 합이 많고, pH가 높지만 치환성 Aℓ이 적은 지역(relve´ 19·20)의 식생은, 방동산이대가리, 방동산이, 여뀌바늘, 돌피, 고만이, 버드나무의 어린싹, 구룹4 : Loss on ignition에 의한 유기물, 치환성 Mg 및 최대용수량이 많고, 모래가 적은 지역 (relve´ 21~25)의 식생은 차풀, 며느리배꼽, 강아지풀, 돌콩, 왕고들빼기, 금강아지풀, 사철쑥, 쑥, 실새풀, 매돕풀, 달맞이꽃, 제비쑥 및 김의털등이 형성되었다. 그리므로 식생의 구룹형성은 환경요인을 구룹지음으로서 그원인을 찾아 보 수 있었다.