土温对植物生长的影响及其机理分析  

EFFECT OF SOIL TEMPERATURE ON THE GROWTH OF PLANT AND AN ANALYSIS OF ITS MECHANISM

作　　者：范爱武[1] 刘伟[1] 刘炳成[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《工程热物理学报》2004年第1期124-126,共3页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展规划项目(No.G2000026303);国家自然科学基金(No.59976010);教育部博士点基金(No.2000048731>

摘　　要：以二年生草本花卉黑心菊为材料,研究了土壤温度对其生长发育的影响。结果表明,加热株地上部的湿重和干重均比未加热株大,而加热株根系的湿重和干重则比未加热株小;且加热株具有较小的根冠比。这些说明适宜的土壤温度使根系的吸收活力增强,有利于植物地上部的生长发育,同时植物根系会通过功能补偿作用对不良土温做出适应性反应,以减少不良土温对植物的危害。The effect of soil temperature on the growth was studied in Rudbeckia hirta, a biennial herbaceous flower.The results showed that the wet weight and dry weight of the over-ground part of the plant heated were heavier than those of the plant unheated; whereas the situation was reverse for the root systems of the two plants. Moreover, the plant that was heated has a smaller roots/canopy ratio. All the results indicated that a suitable soil temperature enhanced the absorption activity of the root system and was propitious to the growth of the over-ground part of the plant. At the same time,the plant did adaptation reaction to harmful soil temperature through function compensation.

关 键 词：土温 植物生长 鲜重 干重 根冠比 

分 类 号：S152.8[农业科学—土壤学]