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首页> 外文期刊>International Journal of Forestry Research >Effect of Forest Management Types on Soil Carbon Stocks in Montane Forests: A Case Study of Eastern Mau Forest in Kenya
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Effect of Forest Management Types on Soil Carbon Stocks in Montane Forests: A Case Study of Eastern Mau Forest in Kenya

机译：森林管理类型对蒙太金森林土壤碳股的影响 - 以肯尼亚东部森林为例

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Mau Forest, a major forest reserve in Kenya, has experienced anthropogenic disturbances through encroachment and forest fires. This study aimed at comparing the soil carbon stocks in different forest management types as well as how seasonal climatic changes influence its dynamics. The study was undertaken in the Eastern Mau block (Sururu) which forms part of the greater Mau Forest Complex. The forest management interventions have been in place for over 15 years with disturbed (fire) natural forest experiencing fires in 2005, 2007, and 2014 while cypress plantations were established in 1994. A nested experimental design was used in data collection, where thirty-two sample plots were nested into four blocks each measuring 100?m2 delineated by forest management types (disturbed by fire, natural forest, undisturbed natural forest, plantation, and glades). In each plot, data on soil carbon stocks, soil bulk density, soil moisture, and temperature were collected for both dry and wet seasons. Data collection was carried out between November 2015 and December 2016. The results indicated that there were no significant differences in the carbon stocks among the forest management types (F4,16?=?0.61, P=0.613). However, seasonal weather changes significantly affected the amount of carbon stocks among the forest management types (F4,16?=?0.61, P0.05). The undisturbed natural forest had the highest mean soil carbon stocks, while the plantation forest had the lowest as follows: undisturbed natural forest (135.17?±?35.99.0?Mg·C?ha), disturbed natural forest by fire (134.52?±?38.11?Mg·C?ha), glades (122.4?±?64.9?Mg·C?ha), and plantation forest (116.51?±?39.77?Mg·C?ha). Furthermore, the undisturbed natural forest management had the highest bulk density (0.66?g/cm3), while the disturbed (fire) natural forest had the lowest (0.59?g/cm3). These values were low compared to most normal mineral soils which have a bulk density of between 1.0?g/cm3 and 1.5?g/cm3. There was a significant (P0.01) relationship between seasonal weather (temperature) changes and soil carbon stocks under different forest management types with the relationship being stronger in soils under glades (r2?=?0.62) and weak in the undisturbed natural forest (r2?=?0.26). In conclusion, forest disturbances have an impact on soil carbon stocks, and for effective management of forest towards climate stabilization, then disturbance should be minimized if not avoided.
机译：肯尼亚的一个主要森林储备茂森林森林经历了通过侵蚀和森林火灾的人为干扰。该研究旨在将不同森林管理类型中的土壤碳股和季节性变化如何影响其动态。该研究在东部群体（Sururu）中进行了，这些群体构成了大MAU森林综合体的一部分。森林管理干预措施已经有超过15年的人在2005年，2007年和2014年经历火灾的令人不安（火灾）天然森林，而赛普拉斯种植园成立于1994年。在数据收集中使用嵌套的实验设计，其中三十二将样品图嵌套在四个块中，每个块被森林管理类型划分为100？M2（由火灾，天然森林，未受干扰的天然森林，种植园和Glades受到干扰）。在每种情节中，为干燥和潮湿的季节收集土壤碳储量，土壤堆积密度，土壤水分和温度的数据。数据收集是在2015年11月至2016年12月之间进行的。结果表明，森林管理类型中的碳股无显着差异（F4,16？= 0.61，P = 0.613）。然而，季节性天气变化会显着影响森林管理类型中的碳储量量（F4,16？= 0.61，P> 0.05）。未受干扰的天然森林具有最高的平均土壤碳股票，而种植园森林的含量最低如下：未受干扰的天然森林（135.17？±35.99.0？Mg·C？HA），火灾扰乱的天然森林（134.52？± ？38.11？mg·c？ha），glades（122.4？±64.9？mg·c？ha）和种植园森林（116.51？±39.77？mg·c？ha）。此外，未受干扰的天然森林管理具有最高的散装密度（0.66Ω·克/厘米），而受干扰的（火）天然森林最低（0.59？G / cm3）。与大多数正常的矿物土壤相比，这些值较低，其堆积密度为1.0 ~g / cm3和1.5？g / cm3。在不同的森林管理类型下的季节性天气（温度）变化和土壤碳储量之间存在显着（p> 0.01）的关系，该关系在粘着的土壤中更强大（R2？= 0.62），在未受干扰的天然森林中弱（ R2？=？0.26）。总之，森林紊乱对土壤碳股产生影响，为森林的有效管理朝气候稳定，如果不避免，应最小化干扰。

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