巴西南巴西大州东南部牧场地区镁元素动态。2. 相关性

A. C. Fluck, H. Alfaya, Michelle de Almeida Ollé, João P. da Silva, J. Reis
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引用次数: 0

摘要

本文旨在评价土壤-植物-动物链中镁的动态变化。该研究是在两个自然牧场地区进行的,在苏德斯特山脉(巴西南大州)的两种未受干扰的(原始)土壤(中/粘土质地)上进行的。在每个地区,12头动物(小母牛)连续放牧12个月,不补充矿物质。每月在16个定点(半径为25 m)采集土壤和植被样本,并在每个区域采集每只动物的血清,测定Mg和其他矿物质水平。对数据进行方差分析,分解响应变量的年变化,并采用周期回归(调和分析)对函数进行调整来表达这种变化。土壤-植物-动物链各环节中Mg与其他变量的关系受土壤理化和生物反应、植物区系组成和环境条件等因素的影响。在自然无扰动的牧场地区,有机质是土壤的主要胶体,为植物提供镁,从而也为动物提供镁。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamics of magnesium in rangeland areas of Southeastern region of the State Rio Grande do Sul/Brazil. 2. Correlations
We aimed to evaluate the dynamics of magnesium (Mg) in the soil - plant – animal chain. It was conducted in two natural rangeland areas on two types of undisturbed (virgin) soils (medium/clayey texture) in the Serra do Sudeste (Rio Grande do Sul State, Brazil). In each of these areas, 12 animals (heifers) were kept under continuous extensive grazing for twelve months without mineral supplementation. Every month, samples of soil and vegetation were collected at 16 fixed points (radius: 25 m) as well as blood serum from each of the animals in each area for the determination of Mg and other minerals levels. The data were analyzed using the analysis of variance, decomposition of the annual variation of the response variables and periodic regression (harmonic analysis) for adjustment of function to express this variation. The relationship of Mg with other variables within the links of the soil-plant-animal chain is influenced by some factors such as physicochemical and biological soil reactions, floristic composition and environmental conditions. In natural non perturbed rangeland areas the organic matter is the main colloid of the soil for the availability of magnesium to plants and, consequently, to the animals.
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