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通过盆栽试验研究了透光率在100%、66%、20.5%和9%的4个光照梯度下,马蹄金的生物量分配及形态特征。结果表明:随着遮光程度的增加,单株的生物量表现出先上升后下降的趋势,在66%透光率下生物量达到最高值;单株生物量分配随着遮光度的增加也发生了改变,其中叶生物量比及叶柄生物量比增加,根生物量比下降,茎生物量比表现出先增大后减小的趋势;随着遮光程度的增加,茎节间长度逐渐增加,分枝角度减小,茎长、分枝强度、叶面积、叶柄均呈先增大后减小的变化趋势。综合分析表明,马蹄金对光环境有一定的适应能力,适度遮光有利于马蹄金的生长、构件数量的增加和生物量的积累,强光或严重遮光均不利于其生长发育。
The pot experiment was conducted to study the biomass distribution and morphological characteristics of Dichondra repens under four illumination gradients of 100%, 66%, 20.5% and 9%. The results showed that with the increase of shading degree, the biomass of individual plants showed the first increase and then the decrease, and reached the highest value under the light transmittance of 66%. The biomass allocation per plant also took place with the increase of shading The ratio of leaf biomass and petiole biomass increased, the ratio of root biomass decreased, and the ratio of stem biomass increased firstly and then decreased. With the increase of shading degree, the length of internode increased gradually, Angle decreased, stem length, branch strength, leaf area, petiole showed the first increase and then decrease the trend. The comprehensive analysis showed that Dichondra repens light to a certain degree of adaptability, light shade is conducive to the growth of Dichondra repens, the increase in the number of components and biomass accumulation, strong light or severe shading are not conducive to its growth and development.