摘要
目的 :明确甘草的耐阴性 ,为甘草的林药间作提供理论依据。方法 :采用遮荫棚遮荫 ,设置了 5种遮荫处理 ,透光率分别为CK(10 0 % ) ,T1(75 % ) ,T2 (6 5 % ) ,T3 (5 0 % ) ,T4(2 5 % )。从生长特性、生理生态特性、生物量和有效成分含量等多个角度对甘草的耐阴性进行了系统的研究。结果与结论 :甘草为喜阳植物 ,其株高、地径、叶片数、芦头直径等生长指标 ,日平均光合速率 (Pn)和各项生物量指标均以CK最高 ,并随着遮荫程度的增加 ,呈不同程度的降低趋势。但甘草对遮荫也产生了一定的适应性反应 ,主要表现为增加单叶叶面积和叶绿素含量。遮荫对甘草绝对光能利用率 (Eu)和Fv/Fm 值没有产生显著影响 ,而对甘草酸含量影响显著 。
Objective:To study the shade-endurance property of Glycyrrhiza uralensis and provide rationale for the practice of intercropping G. uralensis with trees. Method: Black shading nets were used to provide five different environments of light intensities (light penetration rates of 100%, 75%, 65%, 50% and 25%, respectively). To assess the shade-endurance capacity of G. uralensis, several aspects were evaluated, including growth characters, physiological and ecological characters, biomass, and chemical contents. Result and Conclusion: G. uralensis is a light-favored plant. The growth indices such as plant height, stem diameter, leaves number, root diameter, biomass, and daily average photosynthetic rate (P_n) are highest when light permeation rate is 100%. All these indices decrease when light intensity decreases. However, G. uralensis possesses shade-endurance capacity to some degree; it adapts to the shading environment by increasing the leaf area and chlorophyll contents. Shading has no obvious effect on the absolute light energy utilization rate (E_u) or F_v/F_m ratio. The influence of shading on the chemical contents of G. uralensis is obvious.
出处
《中国中药杂志》
CAS
CSCD
北大核心
2005年第2期100-104,共5页
China Journal of Chinese Materia Medica
基金
河北省林业厅"林药产业栽培技术体系研究"资助项目 (960 3 10 6)
