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Study on Ecological Characteristic of Natural Kandelia Candel and the Comparison of High-yield Forest of Esatern Fujian Province

Author: LiXiaoJing
Tutor: HeDongJin；HongWei
School: Fujian Agriculture and Forestry University
Course: Ecology
Keywords: Fuding Candel Natural forest Plantation Ecological characteristics
CLC: Q948
Type: Master's thesis
Year: 2010
Downloads: 81
Quote: 1
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Abstract


Through the distribution pattern of the Mindong coastal Fuding City candel mangrove populations of different origins of the structure, life table, space, biomass, carbon stocks, calorific value and other ecological characteristics of a comparative study, the results showed that: ① different origin candel forest There are some differences in height diameter level. The natural forest height structure is mainly concentrated in the 0 ~ 0.5m, while the plantations are concentrated in the 1.5 ~~ 2m. Different origins candel forest difference on the ground diameter diameter class structure, natural forests mainly diameter class in grade Ⅰ, and presented with the diameter of the increase and decrease. Plantation grade Ⅰ missing, showing Ⅲ grade normal distribution. ② candel populations in the development and succession process, there are two peaks of mortality, from seedling to sapling stage transformed into a peak in adulthood appear two peak, Ⅷ age level when the majority of individuals death. Individual expectations of the average viability Ⅸ largest age class; survival curve is typical of Deevey-Ⅲ type, the number of populations of early survival and rapid decline with age class, late survival value fluctuations. ③ using the the gathered strength indicators law, Iwao, M *-χ regression with Taylor power law distribution pattern of a comparative analysis of different origin candel forest space results that Fuding candel natural forests seedling group showed aggregated distribution, small tree groups, large tree groups old trees group showed random distribution. Candel plantation small tree group, trees group was randomly distributed. The ④ candel natural forest biomass 58.305t/hm2, and the aerial parts for 32.919t/hm2, underground part 25.386t/hm2; the the candel plantations biomass 25.359t/hm2, the aerial parts 14.711t/hm2, underground part 10.648t/hm2. The flowers, leaves, branches, dry biomass data show the different origins candel biomass allocation are branches gt; stem gt; coarse roots gt; leaves gt; roots gt; pier gt; the gt; flowers of fine roots. ⑤ the Mindong coastal candel forest carbon savings amount shrub layer, dead material layer, soil layer. Their carbon pool size order: the soil layer gt; shrub layer gt; dead material layer. The results show that: candel natural forest ecosystem carbon stocks for 221.505t? Hm-2 aerial parts 28.732t? Hm-2, the underground part 192.782t? Hm-2; the candel plantations carbon reserves for 154.739t? Hm- 2, where the aerial parts 10.271t? hm-2 the underground part 144.468t? hm-2. The calorific value of each component in order ⑥ candel natural forest leaf gt; spend gt; branches gt; stem gt; pier gt; coarse roots gt; Root gt; fine roots. Fluctuation range of the calorific value of the dry weight of each component 12kJ / g ~ 18kJ / g; calorific value of the order of the various components of the plantation leaves gt; stem gt; branches gt; pier gt; spend gt; coarse roots gt; fine roots gt; roots. Different origins candel forest leaves highest calorific value greater than 17kJ / g. The root of the minimum calorific value of less than 13 kJ / g. Old K. candel leaf calorific value differences With the constant increase in age, their foliage caloric values ??fall trend. Candel leaf calorific value also with latitude varies. Calorific value of the blade presents decreased with increasing latitude.

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