Construction method for carbon sink forests in eastern subtropical area in China based on functional trait proportion of plant communities
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A plant community and construction method technology, applied in forestry, biological models, instruments, etc., can solve the problems of slow growth, discrimination of carbon-fixing tree species, premature aging, etc., and achieve the effect of solving early decline, enhancing stability, and strong adaptability
Inactive Publication Date: 2019-07-26
EAST CHINA NORMAL UNIV
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[0003] At present, there are mainly the following technical bottlenecks in the construction of subtropical eastern carbon sink forests: First, the current afforestation of subtropical eastern carbon sink forests takes traditional tree planting experience as a reference, and does not distinguish carbon sequestration tree species from the perspective of plant physiological and ecological functions, and then define plant communities Species composition and its ratio; secondly, in terms of afforestation methods, artificial planting is the main method of afforestation, and most of them are planted with positive fast-growing trees. After the young forests are closed, the stand competition is fierce, and a large number of positive species invade. , Poor ventilation, resulting in high mortality, slow growth, difficult regeneration, premature senility, low quality, and low efficiency in young forests, making the constructed "carbon sink" forest part a "carbon source" forest; in addition, in In terms of tending methods, the traditional stand tending method is the main method, often resulting in frequent occurrence of forest diseases and insect pests, poor tree quality, weak stand stability and resistance, and it is difficult to form a healthy and stable "carbon sink" mixed plants of different ages community
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Embodiment 1
[0032] Embodiment 1 (new model)
[0033] The implementation site is located in Tiantong Forest Farm, Yinzhou District, Ningbo City, Zhejiang Province. It is geographically located in Tiantong Nanshan (29°47'496"N, 121°47'780"E), with an altitude of 200m, red soil, land thickness ≤ 90cm, slightly acidic. The average annual temperature is 16.2°C, the average annual rainfall is 1386mm, the average annual evaporation is 1320mm, and the annual relative humidity is 82%. From July to October every year, it suffers an average of 2-3 tropical storms. The forest land was a low-quality Chinese fir plantation in the early stage, with a small amount of Sassafras regenerated, and the Chinese fir was harvested in the winter of 2000 for land preparation and reconstruction. The experiment period was from 2001 to December 2018.
[0034] This implementation process uses a subtropical eastern carbon sink forest construction method based on the ratio of plant community traits and functions provi...
Embodiment 2
[0056] Embodiment 2 (modification type)
[0057] The embodiment site is located in the valley area of Nanshan, Tiantong Forest Farm, with an altitude of 160m, a slope facing west, a slope of 18°, red soil, soil thickness≤80cm, and slightly acidic. In the early stage, the forest land was a natural forest of secondary jujube and sweetgum sweetgum (45 years old forest). Due to the long-term enclosure of the forest, there were many sun-born depreciation species in the forest, dense shrubs, bamboos, vines, and grass, the quality of the forest was poor, and the productivity was low. It has become a low-quality and low-quality forest. In the winter of 2001, a 20m×20m sample plot was investigated on this stand, and in the spring of 2002, low-efficiency forest improvement was implemented.
[0058] In the above-mentioned typical woodland area, adopt steps 1 to 4 to select suitable carbon-fixing tree species, and according to the forest survey structure, keep the mature trees (diameter...
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Abstract
The invention discloses a construction method for carbon sink forests in an eastern subtropical area in China based on functional trait proportions of plant communities. The construction method comprises the following steps: investigating species composition of natural forest communities, carbon fixation functional traits of plants and above-ground carbon reserve volumes under different site conditions; establishing a structural equation model based on the composition of the functional traits of the plant communities and the above-ground carbon reserve volumes; screening plant community typeswith a remarkable carbon sink function, selecting good carbon fixation species according to weight formed by the functional traits of the plant communities; furthermore, screening optimal carbon fixation species adapting to the different site conditions according to topographic dependence of a relation between the composition of the functional traits of the plant communities and the above-ground carbon reserve volumes; quantifying a species quantitative proportion of target carbon sink plant communities according to the weight ratio of the composition of the functional traits of the plant communities; finally, forming a complete efficient carbon sink forest construction method by integrating the composition of functions of the plant communities, quantity configuration, plant configurationdensity, a planting method, young forest tending and the like. The construction method has the advantages of high carbon sink efficiency, strong adaptability, good growth, low cost and the like.
Description
technical field [0001] The invention relates to a method for constructing a carbon sink forest, in particular to a method for constructing a subtropical eastern carbon sink forest based on the ratio of plant community traits and functions. Background technique [0002] Forests absorb CO through photosynthesis 2 , and fix it in vegetation and soil, it has a good carbon sink function, and it can reduce CO in the atmosphere through forest carbon sequestration 2 The concentration is currently internationally recognized as an effective way to control climate warming. The plant community is composed of different life forms and functional plants. Under the same site conditions and management measures, the carbon sequestration capacity of its constituent species is the key factor determining the overall carbon sink process and size of the forest. Therefore, studying the carbon sequestration capacity of different tree species, screening and cultivating tree species with high carbon...
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