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Effect of Climate and Competition on Radial Growth of IPinus sylvestris/I var. Imongolica/I Forest in Hulunbuir Sandy Land of Inner Mongolia, China
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Effect of Climate and Competition on Radial Growth of IPinus sylvestris/I var. Imongolica/I Forest in Hulunbuir Sandy Land of Inner Mongolia, China
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Effect of Climate and Competition on Radial Growth of IPinus sylvestris/I var. Imongolica/I Forest in Hulunbuir Sandy Land of Inner Mongolia, China
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Journal Article
Effect of Climate and Competition on Radial Growth of IPinus sylvestris/I var. Imongolica/I Forest in Hulunbuir Sandy Land of Inner Mongolia, China
2023
Overview
(1) Background: The forest of Pinus sylvestris var. mongolica is an important semi-arid ecosystem in Hulunbuir sandy land that plays a key role in the carbon cycle and wind erosion control. It is crucial to explore the main factors affecting the radial growth of trees of P. sylvestris var. mongolica. (2) Methods: The study established the tree-ring chronology of P. sylvestris var. mongolica and analyzed the relationships among the radial growth, competition index, and climate variables using correlation analysis and a linear mixed effect model to explore the influence of competition and climate on radial growth of P. sylvestris var. mongolica. (3) Results: The results indicated that tree growth is mainly affected by the maximum average temperature (T[sub.max] ) and precipitation in June and July of the current year and that tree growth significantly decreased with increasing competition pressure. Analysis of the linear mixed effect model showed that tree age, competition intensity, self-calibrating Palmer drought severity index (scPDSI) from May to July, and vapor pressure deficit (VPD) have a significant impact on radial growth. (4) Conclusions: The competition plays a dominant role in radial growth of P. sylvestris var. mongolica compared to climate factors. This study helps to understand the growth mechanism of P. sylvestris var. mongolica forests under climate change and provides a scientific basis for effective management of semi-arid forests.
Publisher
MDPI AG
