干旱区针叶林土壤的特征

Q4 Agricultural and Biological Sciences
Mohamed Zouidi, A. H. Borsali, Ayoub Allam, R. Gros
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引用次数: 6

摘要

摘要干旱区是受气候和地理因素共同作用的恶劣环境,降雨量少且不规律,高温加剧,土壤脆弱脆弱。近年来,人们注意到植被正在退化,大多数重新造林都失败了。本研究旨在了解阿尔及利亚西部高原地区松林森林土壤的理化和微生物特征。为此,我们分析了分布在阿勒颇松林五个采样站的几个土壤样本。结果表明:研究区森林土壤总体呈砂质质地,各站位土壤均呈橙色;它们的特点是:碳氮比非常高,表明有机物进化缓慢,缺乏碳分解所必需的氮。电导率表明,土壤中含有一定的盐分,渗透性强,湿度较低,pH值偏碱性(> 8),这是由于该地区石灰石含量增加所致。与微生物生物量相比,基础呼吸较低,这是由于土壤的理化质量较差以及水分胁迫减缓微生物活动的影响。这一干旱森林的土壤一般具有土壤同质性的特点,对环境因素(主要是贫穷)的影响很敏感,对其正常运作所必需的元素(如氮和水)也很敏感,这些因素加剧了这些森林地层的土壤退化,从而引发退化的风险。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Characterization of coniferous forest soils in the arid zone
Abstract Arid zones are very harsh environments characterized by binding edaphic and climatic factors, their rainfall is low and irregular accentuated by high temperatures and their soils are fragile and vulnerable. In recent years, it has been noted that vegetation is regressing and that the majority of reforestation has been a failure. Our study aims to know the physico-chemical and microbiological characteristics of forest soils in the pinewoods of an area of the highlands of western Algeria (Naama). For this we analyzed several soil samples spread over five sampling stations in a forest of Aleppo pine. The results show that the forest soils of our study area are characterized by a generally sandy texture and an orange color for all the selected stations. They are characterized by: a very high C/N ratio that indicates a slow evolution of organic matter and a nitrogen deficiency that is necessary for carbon decomposition. The conductivity shows that the soil contains some salinity, its permeability is strong and its humidity fairly low with an alkaline pH (> 8) due to the increase in the limestone level in the area. Basal respiration is low compared to microbial biomass due to poor physico-chemical quality of soils and the effect of water stresses that slow down microbial activities. Soils in this arid forest are generally characterized by soil homogeneity sensitive to the influence of environmental factors mainly poverty into elements necessary for its proper functioning such as nitrogen and water that accentuate soil degradation of these forest formations, which results in the risk of degradation being triggered.
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来源期刊
Forestry Studies
Forestry Studies Agricultural and Biological Sciences-Forestry
CiteScore
0.70
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