| 摘要: |
| 【目的】研究不同郁闭度毛竹人工林对多花黄精(Polygonatum cyrtonema)生长和黄酮含量的影响,旨在筛选出适宜多花黄精生长发育的毛竹人工林郁闭度，为多花黄精高效栽培技术的建立提供理论依据。【方法】以不同郁闭度（0.3，0.5，0.7）毛竹人工林下播种繁殖的多花黄精为研究对象，测定不同处理的土壤理化性质、酶活性以及多花黄精的生长性状和黄酮含量，分析以上指标的相关性；在此基础上构建结构方程模型，分析土壤理化性质、酶活性对多花黄精生长性状和黄酮含量的影响。【结果】随着郁闭度的增大，土壤含水率逐渐减小，土壤体积质量逐渐增大；土壤硝态氮、铵态氮、速效钾、全磷、有机质含量先增加后减小，均在郁闭度为0.5时最大；pH、速效磷、全钾含量均无显著变化。随着郁闭度的增大，土壤过氧化氢酶活性先增加后减小，当郁闭度为0.5时最大；土壤脲酶活性呈增加趋势，酸性磷酸酶、蔗糖酶活性先减小后增加，当郁闭度为0.7时，土壤脲酶、酸性磷酸酶、蔗糖酶活性均达到最大。多花黄精株高、根茎长在郁闭度为0.7时最大；随着郁闭度的增大，根茎鲜质量、干质量、黄酮含量均呈先增大后减小的趋势，均在郁闭度为0.5时最大，且显著高于其他处理。相关性分析结果表明，多花黄精根茎鲜质量、干质量和黄酮含量与硝态氮、铵态氮、速效钾、全磷均呈极显著正相关，与蔗糖酶呈极显著负相关。结构方程模型显示，毛竹人工林郁闭度对多花黄精生长和黄酮含量以及土壤理化性质均产生了正向影响，土壤理化性质对多花黄精黄酮含量和土壤酶活性均有显著的正向影响，土壤酶活性对多花黄精生长和黄酮含量影响较小。【结论】当毛竹人工林郁闭度为0.5时土壤养分含量总体较高，有利于提高多花黄精产量和黄酮含量。 |
| 关键词: 毛竹人工林 郁闭度 多花黄精 黄酮含量 土壤理化性质 土壤酶活性 |
| DOI：10.13207/j.cnki.jnwafu.2025.07.006 |
| 分类号: |
| 基金项目:安徽省高校自然科学研究项目（KJ2021A0160） |
|
| Effects of Phyllostachys edulis plantations with different canopy densities on the growth and flavonoid content of Polygonatum cyrtonema |
|
WU Yufan, FENG Chun, WANG Changchang, HU Jiangtao
|
|
School of Forestry and Landscape Architecture,Anhui Agricultural University,Hefei,Anhui 230036,China
|
| Abstract: |
| 【Objective】This research aimed to study the effects of soil physiochemical properties and enzyme activities in Phyllostachys edulis plantation forests with different canopy densities on the growth and flavonoid content of Polygonatum cyrtonema to screen out the suitable canopy density of P.edulis plantation forests for the growth and development of P.cyrtonema,and to provide theoretical basis for the establishment of P.cyrtonema high-efficiency cultivation technology.【Method】P.cyrtonema seedlings in P.edulis plantations with varying canopy densities (0.3,0.5,and 0.7) were chosen for the study.The soil physicochemical characteristics,enzyme activities,and the growth parameters,flavonoid content of P.cyrtonema in response to these distinct plantation conditions were assessed,and correlation of the above indicators was analyzed.To further elucidate the underlying relationships,a structural equation model was constructed,specifically to investigate the direct and indirect influences of soil properties and enzyme activities on the growth and flavonoid production of P.cyrtonema.【Result】With the increase of canopy densities,the soil water content gradually decreased and the soil bulk density gradually increased.The nitrate nitrogen,ammonium nitrogen,available potassium,total phosphorus,and organic matter content in soil firstly increased and then decreased,with the highest contents for all of them observed in plantation with canopy density of 0.5.No significant difference was observed in pH,available phosphorus,and total potassium content.With the increase of canopy densities,the soil catalase activity increased and then decreased,with the maximum activity observed in plantation with canopy density of 0.5.The soil urease activity increased,and the activities of acid phosphatase and sucrase decreased and then increased,with the maximum activity of soil urease,acid phosphatase,and sucrase observed in plantation with canopy density of 0.7.The highest plant height and rhizome length of P.cyrtonema were observed in plantation with canopy density of 0.7.With the increase of canopy density,the fresh mass,dry mass and flavonoid content of rhizome showed a tendency to increase and then decrease,with the highest values observed in plantation with canopy density of 0.5,which was significantly higher than the other treatments.Correlation analysis showed that the fresh mass,dry mass and flavonoid content of P.cyrtonema rhizomes were positively correlated with nitratenitrogen,ammonium nitrogen,available potassium and total phosphorus,and negatively correlated with sucrase.Structural equation modeling showed that canopy density of P.edulis plantation forest positively affected the growth and flavonoid content of P.cyrtonema as well as the physical and chemical properties of the soil.The physical and chemical properties of the soil had a higher positive effect on the flavonoid content of P.cyrtonema and soil enzyme activity,and the soil enzyme activity had a lower effect on the growth and flavonoid content of P.cyrtonema.【Conclusion】At a canopy density of 0.5 for P.edulis plantations,the soil nutrient levels are relatively high,which can help to enhance the yield and flavonoid content of P.cyrtonema. |
| Key words: Phyllostachys edulis plantation canopy density Polygonatum cyrtonema flavonoid content soil physicochemical properties soil enzyme activities |
