林药复合经营下不同遮阴度对白芨和黄精生长的影响

Effects of different shading degrees on the growth of bletilla striata and rhizoma huangjing under compound management

林地遮阴度对林下套种的植株生长有着重要的影响,且对不同的中药材有着不同的适应性特点。本文研究白芨和黄精两个品种在3种不同强度的遮阴度下成活率、株高、分蘖数及其产量。结果表明:白芨和黄精在总体上表现为对遮阴度的要求黄精(65～80%)>白芨(35～50%)。在具体指标上,在分蘖数上均表现为一级较低遮阴度的条件下具有更高的分蘖数;在株高和成活率上,白芨和黄精表现不一致,前者在较低的遮阴度下(35～50%)有更高的株高和成活率,而后者在较高的遮阴度下(﹥65%)更好;在产量方面,白芨单株重量和亩产量均表现为一级(35-50%)﹥二级(50-65%)﹥三级(65-80%),而黄精在中等遮阴强度的二级(65～80%)具有最高的单株产量和亩产量,较低遮阴度的一级(50-65%)不利于增加黄精亩产量,主要是因为遮阴度过低导致成活率不高所致。

Forest shading has an important effect on the growth of interplanting plants under the forest,and has different adaptability characteristics for different Chinese medicinal materials.In this paper,the survival rate,plant height,tiller number and yield of bletilla striata and huangjing were studied under three shading degrees with different intensities.The results showed that bletilla striata(65~80%)and rhizoma huangjing(35~50%)were the requirements of shading.In terms of specific index,tiller number is higher in the condition of first order lower shading degree.In terms of plant height and survival rate,bletilla bletilla and huangjing differ.The former has a higher plant height and survival rate at a lower shade(35~50%),while the latter has a higher shade(65%).Weight and area yield per plant in terms of production,bletilla are characterized by primary(35-50%)st13 secondary(50-65%)st13 level 3(65-80%),and the intensity of yellow fine in middle shade of secondary(65~80%)has the highest yield and area yield,low level of shade degrees(50-65%)to increase the yellow area yield,mainly because the shade through lead to low survival rate is not high.