樟子松人工林自然更新过程中断的机制及可能调控途径

doi:10.11707/j.1001-7488.LYKX20240077

Abstract

Abstract:

Mongolian Scots pine (Pinus sylvestris var. mongolica) is an important tree species for ecological protection forests in China. Its natural forests are mainly distributed on the northern slopes of the Greater Khingan Mountains and the Hulunbuir Sandy Land. The introduced plantations have spread nearly the whole northern China, becoming the main evergreen and arbor tree species for the construction of windbreak and sand-fixing plantations in the Three-North Project of China. The natural Mongolian Scots pine forests are well naturally regenerated, but most of the artificial forests planted for sand-fixation generally have poor or totally failed natural regeneration. Moreover, the continuous global climate changes have exacerbated the uncertainty for the natural regeneration, which has become the threat and the major hidden danger to the stability and long-term services of the Three-North Project in China. This article systematically summarizes the domestic and foreign research results on the natural regeneration of both Mongolian Scots pine and its original species, Scots pine (Pinus sylvestris), and analyzes the effects and principles of key factors such as seed tree characteristics, habitat characteristics and natural interference that affect the natural regeneration process. Based on the comparison with the natural forest regeneration process, the five key stages of natural regeneration of Mongolian Scots pine plantations are divided, and the mechanism by which abiotic factors and biotic factors at each stage jointly affect the natural regeneration process are clarified. Finally, in response to changing the underground, surface, and above ground environmental conditions of forest land, three measures, including soil preparation, surface burning, and umbrella protection, are respectively proposed to regulate the progress of natural regeneration through artificial intervention. The study provides a new perspective for promoting the generational renewal of the Mongolian Scots pine plantations in the Three-North Project of China.

Key words: Pinus sylvestris var. mongolica, plantation, natural regeneration, drought, artificial promotion

CLC Number:

S754.5

Hongzhong Dang,Shuai Chen,Peng Zhong,Hui Han,Risheng Zhang,Xueli Zhang,Changchun Shi. Mechanism and Possible Regulatory Approaches of Interruption in the Natural Regeneration Process of Pinus sylvestris var. mongolica Plantations in China[J]. Scientia Silvae Sinicae, 2024, 60(12): 158-167.

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Mechanism and Possible Regulatory Approaches of Interruption in the Natural Regeneration Process of Pinus sylvestris var. mongolica Plantations in China

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