乍得西南部Mayo-Lemié区雨养高粱(Sorghum bicolor(L.)Moench)的土壤特征和土壤生态评价

IF 2.1 Q3 SOIL SCIENCE
Agoubli Issine, D. Tsozué, A. Nzeukou, R. Yongue, B. P. Kagonbé
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引用次数: 1

摘要

近几十年来,中非乍得共和国许多地区的农业产量持续下降。为了确定导致产量下降的主要因素,主要是高粱产量下降,本研究在乍得西南部的苏达诺-萨赫勒环境中进行。三个不同深度的土壤剖面,即M1、M2和M3,分别沿地形序列在坡脚、中坡和上坡中挖掘。从三个土壤剖面的每一层采集的土壤样本都进行了标记,并送往实验室进行矿物学、地球化学和物理化学分析。对于土地评估,气候特征根据作物及其气候要求分为等级组。将参数值归因于每种土壤特征,用于土壤评估和计算土地指数。所研究土壤中鉴定的主要矿物为石英、钾长石、斜长石、高岭石、蒙脱石、伊利石,与微量锐钛矿、海泡石、方解石和层间矿物有关。在所有分析的样品中,硅含量都非常高。紧随其后的是铝、铁和钾。高岭石和蒙脱石的存在表明,单唾液酸化是一种在剖面底部向双唾液酸化作用的晶体化学过程。从三个土壤剖面层采集的所有样本主要是沙质的,全球养分贫乏。对高粱种植的土壤气候评估表明,由于土壤质地、湿度和土壤肥力,所研究的土壤在一定程度上至中等程度上适合生产高粱。产量的下降与所研究土壤中的低交换碱含量一致的低碱饱和度有关。这些限制可以通过施肥和施石灰恢复阳离子平衡,将有机投入与矿物肥料相结合,并在土壤序列的底部实现排水通道来解决。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Soil Characteristics and Pedoclimatic Evaluation of Rainfed Sorghum (Sorghum bicolor (L.) Moench) in the Mayo-Lemié Division, South-Western Chad
In recent decades, many regions in the Chad Republic in Central Africa have experienced a continuous decline in agricultural yields. In order to determine the main factors leading to this decline in yields and mainly Sorghum yields, this study was conducted in South-Western Chad, in the Sudano-Sahelian environment. Three soil profiles of variable depths, namely, M1, M2, and M3, were dug along a toposequence, respectively, in the footslope, mid-slope, and the upslope. Soil samples collected from each horizon in the three soil profiles were labelled and sent to laboratories for mineralogical, geochemical, and physicochemical analyses. For land evaluation, climatic characteristics are divided into rating groups with respect to the crop and its climatic requirements. Parametric values were attributed to each soil characteristic for soil evaluation and the land index calculated. The main minerals identified in the studied soils are quartz, K-feldspars, plagioclase, kaolinite, smectite, illite, associated to traces of anatase, sepiolite, calcite, and interstratified minerals. In all the analyzed samples, silicon content is very high. It is closely followed by aluminum, iron, and potassium. The presence of kaolinite and smectite suggests that monosiallitisation is a crystallochemical processes acting at the bottom of profile towards bisiallitisation. All samples collected from the three soil profile horizons are mainly sandy and globally poor in nutrients. The pedoclimatic assessment of Sorghum cultivation reveals that the studied soils are marginally to moderately suitable for the production of Sorghum due to soil texture, wetness, and soil fertility. The decline in yields is related to low base saturation, in line with low exchange base content in the studied soils. These limitations could be solved by restoration of the cation balance through fertilization and liming, combining organic inputs with mineral fertilizer, and the realization of channels for the drainage of water at the base of the soil sequence.
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来源期刊
Applied and Environmental Soil Science
Applied and Environmental Soil Science Earth and Planetary Sciences-Earth-Surface Processes
CiteScore
4.00
自引率
4.50%
发文量
55
审稿时长
18 weeks
期刊介绍: Applied and Environmental Soil Science is a peer-reviewed, Open Access journal that publishes research and review articles in the field of soil science. Its coverage reflects the multidisciplinary nature of soil science, and focuses on studies that take account of the dynamics and spatial heterogeneity of processes in soil. Basic studies of the physical, chemical, biochemical, and biological properties of soil, innovations in soil analysis, and the development of statistical tools will be published. Among the major environmental issues addressed will be: -Pollution by trace elements and nutrients in excess- Climate change and global warming- Soil stability and erosion- Water quality- Quality of agricultural crops- Plant nutrition- Soil hydrology- Biodiversity of soils- Role of micro- and mesofauna in soil
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