Forest edge renewal of Larix gmelinii and its response to the environment

WEI Yulong, ZHANG Qiuliang

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (2) : 165-172.

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南京林业大学学报（自然科学版）
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JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (2) : 165-172. DOI: 10.3969/j.issn.1000-2006.201903025

Forest edge renewal of Larix gmelinii and its response to the environment

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Abstract

【Objective】 This study was conducted to reveal the relationship between the edge regeneration of Larix gmelinii forests and the soil characteristics and environmental factors. 【Method】 Based on the determination of environmental factors and the soil physical and chemical properties, One-way ANOVA and correlation analysis were used to analyze the regenerative growth of L. gmelinii. The correlation among the natural regeneration index of the larch forest edge and the soil physical and chemical properties and environmental factors were calculated.【Result】 The regeneration index in the three plots at 0 m from the edge of the forest was the highest, whereas the regeneration index in the three plots at 20, 40 and 60 m from the edge of the forest showed light change and tended to be stable. The photosynthetic effective radiation and air temperature at the edge of L. gmelinii forest were significantly higher than those in the forest. Soil nutrients at the forest margin were higher than those in the forest, and soil pH in the forest margin was lower than that in the forest. The main factors affecting the regeneration ofL. gmelinii at the forest margin were soil moisture content, soil organic matter and photosynthetic active radiation. The main factors affecting the regeneration of L. gmelinii at the forest margin were soil moisture content and the available soil phosphorus by multiple linear regression analysis. 【Conclusion】 The regeneration effect of L. gmelinii at the forest margin was better than that in the forest. The influence of the forest margin effect on the regeneration ofL. gmelinii forests was within 20 m of the forest margin. The photosynthetic effective radiation, air temperature, and the soil physical and chemical properties could effectively influence the renewal of the L. gmelinii forest, and the water content of the soil was the most important factor affecting the renewal of L. gmelinii. The regeneration of the forest edge of L. gmelinii can be promoted by improving the forest environment.

Key words

Larix gmelinii / forest edge effect / natural regeneration / site condition / environmental factors / soil moisture content

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WEI Yulong , ZHANG Qiuliang. Forest edge renewal of Larix gmelinii and its response to the environment[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2020, 44(2): 165-172 https://doi.org/10.3969/j.issn.1000-2006.201903025

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