摘要
[目的]研究不同遮阴胁迫对丹参生长及光合特性影响。[方法]通过在不同遮阴处理条件下对丹参植株高度、小叶片面积、叶片数等主要农艺性状的调查以及丹参主要生育期光合速率的测定,分析遮阴胁迫对丹参生长及光合特性的影响。[结果]在不同遮阴条件下,随着光照强度的减弱,对丹参生长的影响主要表现在茎变细,植株的高度、小叶片面积、叶片数先增加后减少。在全光照条件下,过强的光照不利于丹参的生长。7、8月份在海棠地2.0 m×3.0 m的遮阴处理下即郁闭度为32.7%时叶面积最大,叶片开展好,且药用器官根增粗增长,说明适度遮阴有利于丹参植株的营养生长。[结论]处于全光照和郁闭度32.7%之间的遮阴适于丹参植株的生长。
[Objective] The research aimed to study the effects of different shade on the growth and photosynthetic characteristics of Salvia miltiorrhiza. [Method]The effects of shading stress on the growth and photosynthetic characteristics of Salvia miltiorrhiza were analyzed by measuring the main agronomic traits such as plant height,small leaf area and leaf numbers of Salvia miltiorrhiza and measured the photosynthetic rate in the main growth period of Salvia miltiorrhiza under different shading treatments. [Result]Under different shading conditions,with the decrease of light intensity,the effect on the growth of Salvia miltiorrhiza was mainly manifested in the thinning of the stem,the plant height,the small leaf area and the leaf numbers increased first and then decreased. In full light conditions,too strong light was not conducive to the growth of Salvia miltiorrhiza. In July and August,the leaf area was the largest in the shade of 2. 0 m × 3. 0 m（ when the canopy density was 32. 7%） in Begonia,the leaf was well developed and the root of the medicinal organ increased,which indicated that the moderate shade was beneficial to the plant nutritional growth. [Conclusion]Shade between 32. 7% of total light and canopy closure is suitable for the growth of Salvia miltiorrhiza.
出处
《安徽农业科学》
CAS
2017年第29期112-113,200,共3页
Journal of Anhui Agricultural Sciences
基金
山东省现代农业产业技术体系中草药创新团队(SDAIT-20-08)
关键词
丹参
遮阴胁迫
光照强度
光合特性
影响
Salvia miltiorrhiza
Shading stress
Light intensity
Photosynthetic characteristics
Effect
