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- Title
辽东山区蒙古栎次生林天然更新特征及其影响因子分析.
- Authors
董莉莉; 汪成成; 赵济川; 刘红民; 王建军; 高英旭; 李兴忠
- Abstract
【Objective】This paper analyzed the regeneration characteristics of Quercus mongolica secondary forest in the mountainous area of Eastern Liaoning and explored the main influencing factors to provide basis for the restoration and sustainable management of natural secondary forest in this region.【Method】Tree regeneration status and environmental factors of Q. mongoulica secondary forest in the mountainous area of Eastern Liaoning were investigated using the typical sample plot investigation method.The effects of environmental factors on density of seedlings (height(H)<1 m) and saplings ((H)>1 m,diameter at breast height<5 cm) were analyzed by Pearson correlation analysis. The key factors affecting the density of seedlings and saplings were explored using multiple stepwise regression analysis method.【Result】① There were 30 regeneration tree species in Mongolian oak secondary forest in this region belonging to 14 families and 21 genera dominated by Quercus mongolica,Acer truncatum,Fraxinus rhynchophylla,A. pseudosieboldianum and Tilia amurensis.The density of regeneration seedlings was in an inverse J-shape distribution along with height-class.The number of grade Ⅰ(H<30 cm) and Ⅱ (30 cm≤H<60 cm) seedlings accounted for 60.20%.The density of grade Ⅹ (270 cm≤H<300 cm) saplings was only 1.91% of the density of grade Ⅰ.The number of seedlings was 38 times of sprouting seedlings.② Seedling density had significant positive correlations with canopy open degree,total photosynthetic radiation,soil total phosphorus and available phosphorus (P<0.05),and extremely significant or significant negative correlations with leaf area index,litter thickness,soil pH value,soil total nitrogen,alkali hydrolytic nitrogen content and organic matter content (P<0.01 or P<0.05).Sapling density had significant negative correlations with canopy openness,soil total P and soil available K (P<0.05) and significant positive correlations with leaf area index and soil water content (P<0.05).③ The key factors affecting density of seedlings and saplings were different at different life stages.The density of seedlings was mainly affected by canopy open degree,soil total phosphorus content and soil pH value,while the density of saplings was more affected by soil total phosphorus content and soil water content.【Conclusion】The secondary forest of Q. mongolica in the mountainous area of Eastern Liaoning was rich in tree regeneration,but with natural renew difficulties due to high seedling mortality and less saplings.Management measures of clearing litter,cutting shrubs and tending thinning are suggested to artificially promote natural regeneration.
- Subjects
LIAONING Sheng (China); PHOSPHORUS in water; LEAF area index; PHOSPHORUS in soils; SECONDARY forests; SOIL moisture; OAK; FOREST soils; LINDENS; MOUNTAIN soils
- Publication
Journal of Northwest A & F University - Natural Science Edition, 2023, Vol 51, Issue 1, p94
- ISSN
1671-9387
- Publication type
Article
- DOI
10.13207/j.cnki.jnwafu.2023.01.011