Contenido de nutrientes de especies leñosas en la estepa patagónica, Argentina.

IF 0.6 4区生物学 Q4 PLANT SCIENCES

Boletin De La Sociedad Argentina De Botanica Pub Date : 2017-12-15 DOI:10.31055/1851.2372.v52.n4.18844

M. Barría, Martina Crettón, Celeste Gurín, M. Arce, Enrique Rost, M. Mazzuca

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引用次数: 2

Abstract

Woody plants constitute a vital food reserve for the herbivores inhabiting the Patagonian steppe. In a preliminary study, some of these plants showed a high content of ether extract (FAT). To determine whether the low availability of nitrogen in soils leads to low forage quality and whether a high FAT content correlates with a high amount of nutritive lipids, namely fatty acids (FA), chemical parameters of forage quality of aerial parts of thirteen woody plants from this steppe were analyzed. Plants showed moderate or low crude protein (CP) content, and, independently of the FAT content, all samples had approximately the same total content of FA (TFA), with an average of 1% of dry matter. The highest CP content was found in aerial parts of Atriplex lampa (13%), Atriplex sagittifolia (10%), Adesmia salamancensis (10%) and seeds of Retanilla patagonica (22%). This parameter and the values of digestibility (DMD) defined these four species as those with best forage quality. Except for A. lampa and Berberis microphylla, which have been previously studied in other regions of Argentina, this is the first report on the nutritional quality of woody species from the Patagonian steppe.

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阿根廷巴塔哥尼亚草原木本物种的营养含量。

木本植物为居住在巴塔哥尼亚草原的食草动物提供了重要的食物储备。在初步研究中，这些植物显示出高含量的醚提取物(FAT)。为了确定土壤氮素有效性低是否导致牧草质量低，以及高脂肪含量是否与高营养脂质即脂肪酸(FA)含量相关，对该草原13种木本植物地上部分牧草质量的化学参数进行了分析。植株粗蛋白质(CP)含量为中低水平，除脂肪含量外，所有样品的总FA (TFA)含量基本相同，平均为干物质的1%。CP含量最高的分别为枫香(13%)、枫香(10%)、水杨(10%)和巴塔哥尼加种子(22%)。该参数和消化率(DMD)值将这4种确定为饲料品质最好的品种。除了先前在阿根廷其他地区研究过的小叶小檗(Berberis microphylla)和小叶小檗(A. lampa)外，这是首次报道来自巴塔哥尼亚草原的木本物种的营养质量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Boletin De La Sociedad Argentina De Botanica PLANT SCIENCES-

CiteScore

1.00

自引率

33.30%

发文量

审稿时长

>12 weeks

期刊介绍： Bol. Soc. Argent. Bot. publishes original scientific works from the whole spectrum of Plant Biology (structure, anatomy, development, physiology, cytology, genetics, evolution, ecology, paleobotany, palynology, ethnobotany, etc.) in the diverse vegetable organisms and related groups (mycology, ficology, lichenology, briology, etc.), both in basic and applied aspects. Taxonomic works (of systematics, phylogeny, monographs, revisions, lectotypifications, nomenclatural acts, descriptions of taxa), phytogeographic and phytosociological works (survey and classification of vegetation at different spatial scales and without restriction of methodological approaches) are considered for publication. Contributions that address complete phytogeographic units or sub-units and those that fill gaps in knowledge of vegetation in little-known territories are especially welcome. Extensions of geographical areas are published only when it comes to new citations for a country. Checklists and lists of annotated plants are not published. Articles submitted for publication must be original and must not have been submitted to another publisher or previously published (print or electronic format). Submissions of papers already published in another language will not be accepted (autoplagio for translation).