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Ⅰ.指示植物的意义和观念: 1.意义—广意方面:同一种植物根据它於生长情形、产量、品质和形态,就可以指示它的产地的土壤,气候成其它自然环境的特征。狭意方面:就是不同种的植物或一群不同种的植物可以指示不同环境的特征,本文即指狭意方面的意义而言。 2.观念: (一)植物的生长是多种环境因素的综合结果,所以一种氢质土的指示植物,并不是任何氢质土上都能找得到的,除非当地的气候和其它环境因素也适宜。 (二)指示植物的分类是根据我们研究对象而分的,例如钠贤士指示植物,有的限於潮湿的钠质土,有的限於排水良好的钠质土,如果对象是研究植物与土壤水份的关系,即同样属於钠质土指示植物,就可分为湿土或乾土的指示植物。Ⅱ.氢质土的指示植物:氢质土就是酸性土,就其化学成份言,含有高量
I. Significance and Concept of Indicating Plants: 1. Significance - Aspects of Consensus: The same plant can indicate the soil of its place of production and the climate as a feature of other natural environments based on its growth, yield, quality and morphology. On the narrow side: that is, different species of plants or a group of different species of plants can indicate the characteristics of different environments, this article refers to the narrow sense of terms. 2. Concept: (i) The growth of plants is the result of a combination of environmental factors. Therefore, an indicator plant of hydrogen-rich soil can not be found on any hydro-soil unless the local climate and other environmental factors Also suitable. (B) The classification of plants is dictated by the type of plant we are studying. For example, plants designated by Sodium Magi indicate plants, some are restricted to moist sodium-bearing soils, and some are limited to well- drained soils. If the object is plant and soil moisture The relationship between the same, that is, belonging to the sodium soil indicator plants, can be divided into wet or dry soil indicator plants. II. Indication of Hydrogen-bearing plants: Hydrogen-bearing soils are acidic soils containing, in terms of their chemical composition, high amounts of