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Plant dry weight and nutritive value of genetically diverse germplasm of false Rhodes grass [Leptochloa crinita (Lag.) P.M. Peterson and N.W. Snow], a native forage grass from arid regions of the Americas
Crop Science ( IF 2.3 ) Pub Date : 2021-12-13 , DOI: 10.1002/csc2.20678
Deolindo Luis Esteban Dominguez 1 , Juan Bruno Cavagnaro 1 , María Belén Pérez 2 , Pablo Cavagnaro 2
Affiliation  

The native forage, false Rhodes grass [Leptochloa crinita (Lag.) P.M. Peterson and N.W. Snow], represents an important component of the arid and semi-arid rangelands of the Americas, due to its large area of distribution and its tolerance to drought and cattle grazing. Precise information on nutritive value and the factors that influence this trait is relevant for effective utilization as a forage in arid regions of the world. Here, we characterized dry matter (DM) per plant and nutritive value parameters in leaves, stems, and panicles of 21 genetically diverse L. crinita accessions, in a 2-yr partially replicated trial. Dry matter, crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), ash, fat, phosphorus, and calcium concentrations were determined. Significant (p < .01), substantial variation was found among accessions for DM, CP, NDF, ADF, ash, and fat content. Whole-plant DM varied ∼three-fold among the accessions. Variation was also found among the plant parts (p < .001) for all traits, with leaves and panicles having greater CP content than stems, and leaves being the less fibrous organs. In general, the range values found for DM (117–342 g DM plant−1), CP (76–109 g kg−1), NDF (747–839 g kg−1), and ADF (425–479 g kg−1) partially overlapped the range of variation reported for these traits in other forage grasses of arid regions, although some L. crinita accessions had greater CP and DM than most of the compared species; suggesting that L. crinita is an adequate forage grass for cattle grazing.

中文翻译:

来自美洲干旱地区的原生牧草假罗德草 [Leptochloa crinita (Lag.) PM Peterson and NW Snow] 遗传多样性种质的植物干重和营养价值

原生草料,假罗兹草 [ Leptochloa crinita (Lag.) PM Peterson 和 NW Snow],由于其大面积分布和耐旱和耐旱性,是美洲干旱和半干旱牧场的重要组成部分。牛放牧。关于营养价值和影响该性状的因素的准确信息对于在世界干旱地区作为草料的有效利用是相关的。在这里,我们描述了 21 种遗传多样性L. crinita的每株植物的干物质 (DM) 和叶、茎和穗的营养价值参数加入,在 2 年的部分重复试验中。测定干物质、粗蛋白 (CP)、中性洗涤纤维 (NDF)、酸性洗涤纤维 (ADF)、灰分、脂肪、磷和钙浓度。显着的 ( p  < .01),在 DM、CP、NDF、ADF、灰分和脂肪含量的材料中发现了显着差异。全株 DM 在种质中变化了~三倍。所有性状的植物各部分之间也存在差异 ( p  < .001),叶和穗的 CP 含量高于茎,叶是纤维较少的器官。一般来说,DM (117–342 g DM 植物-1 )、CP (76–109 g kg -1 )、NDF (747–839 g kg -1 ) 和 ADF (425–479 g kg -1) 部分重叠了干旱地区其他牧草中这些性状的变异范围,尽管一些L. crinita种质的 CP 和 DM 比大多数比较物种更高;表明L. crinita是牛放牧的充足草料。
更新日期:2021-12-13
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