QIAO Zhanguo,WU Jiaojiao,WANG Fang,et al.Effects of Different Light Intensities on Growth and Development of Artemisia ordosica Krasch[J].Northern Horticulture,2024,(15):75-80.[doi:10.11937/bfyy.20231615]
不同光照强度对黑沙蒿生长发育的影响
- Title:
- Effects of Different Light Intensities on Growth and Development of Artemisia ordosica Krasch
- 文章编号:
- 1001-0009(2024)15-0075-06
- 分类号:
- S 718
- 文献标志码:
- A
- 摘要:
- 以毛乌素沙地南缘榆林沙区的黑沙蒿（Artemisia ordosica Krasch）为研究对象，选取阳坡、阴坡、邱间地、丘顶4种样地，设置3个不同光照强度（L0，遮光率0%，CK；L1，遮光率40%；L2，遮光率80%）的遮荫棚36个，研究了不同光照强度对黑沙蒿生长发育的影响,以期为沙区生态功能提质增效提供参考依据。结果表明：遮光率与黑沙蒿的平均冠幅、株高、成活率呈极显著负相关关系，与死亡率及其下表层土壤含水率呈极显著正相关关系；同时，遮光率与黑沙蒿死亡率呈极显著线性回归关系，可用方程Y=45.312X+1.394来表达，R2=0.867（P<0.001）。黑沙蒿的平均冠幅、株高、成活率随遮光率的增加而减小。当遮光率为0%时，黑沙蒿的平均冠幅、株高、成活率均最大；遮光率为80%时，其均最小；遮光率为40%时，其介于二者之间，显著大于遮光率80%时而小于0%时（P<0.05）。而死亡率及其下土壤表层含水率随遮光率的增加而增加。遮光率为0%时，死亡率及其下土壤表层含水率最小；遮光率为80%时，其均最大；遮光率为40%时，其介于二者之间，显著大于遮光率0%而小于80%（P<0.05）。
- Abstract:
- Taking Artemisia ordosica Krasch from the Yulin sandy area on the southern edge of the Maowusu sandy land as the research object,four plots were selected,sunny slope,shady slope,hilly area,and hilly top.Three shading sheds with different light intensities (L0,shading rate 0%,CK;L1,shading rate 40%;L2,shading rate 80%) were set up to study the effects of different light intensities on the growth and development of Artemisia ordosica Krasch.Three biological replicates were conducted to study the effects of different light intensities on the growth and development of Artemisia ordosica Krasch,in order to provide reference for improving the ecological function and efficiency of sandy areas.The results showed that the shading rate showed a highly significant negative correlation with the average crown diameter,plant height,and survival rate of Artemisia ordosica Krasch,and a highly significant positive correlation with the mortality rate and the moisture content of the underlying surface soil.At the same time,there was a highly significant linear regression relationship between shading rate and mortality rate of Artemisia ordosica Krasch,which could be expressed by equation Y=45.312X+1.394,with R2=0.867 (P<0.001).The average crown width,plant height,and survival rate of Artemisia ordosica Krasch decreased with the increase of shading rate.When the shading rate was 0%,the average crown width,plant height,and survival rate of Artemisia ordosica Krasch were all the highest;when the shading rate was 80%,it was the smallest;when the shading rate was 40%,it was between the two,significantly higher than the shading rate of 80% and lower than 0% (P<0.05).The mortality rate and its underlying soil surface moisture content increased with the increase of shading rate.When the shading rate was 0%,the mortality rate and the soil surface moisture content below it were the smallest.When the shading rate was 80%,it was the highest.When the shading rate was 40%,it was between the two,significantly higher than the shading rate of 0% and lower than 80% (P<0.05).
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备注/Memo
第一作者简介：乔占国 (1972-)，男，本科，高级工程师,现主要从事荒漠化治理等研究工作。E-mail:517094182@ qq.com.基金项目：榆林市科技计划项目沙蒿花粉控制技术研究资助项目(19-23)。收稿日期：2023-05-11