Abstract

In the present study an attempt has been made to correlate the different soil factors with the growth of four different species of Isoetes L. Soil collected from natural habitats of Isoetes have been analysed for colour, texture, pH and available plant nutrients. The present analysis revealed that the habit of the plant of different species is influenced by edaphic diversity. It has also been found that the genus Isoetes is one of the most edaphically diversified genera of the pteridophyta. There was certain sensitivity of plant length in relation to the various soil factors. The lower scale of acidity favored the growth of Isoetes. The length of the plant decreases with the altitude. The nutrients like, zinc, manganese, iron and copper present in the soil showed significant relationships with the growth of the plants.

中文摘要

本研究是探討部同土壤因子對四種不同品種水韭植物的生長影響。由水韭自然生長區收集土壤樣品，以分析土壤顏色、構造、酸鹼值及植物可利用的養分。本研究發現水韭植物的生長受到土壤變異所影響，同時也發現水韭是蕨類植物中因土壤不同屬也成多樣化的現象。有些植物其長度與不同土壤因素有相關，酸鹼值較低的土壤會促進水韭生長，但是隨著海拔高度的增加，其長度反而隨著減少。另外土壤中的養分如鋅鎂及銅對植物的生長有顯著的影響作用。

Keyword: Soil, Isoetes, Texture, Nutrients and Growth.