Herbage accumulation and nutritive value of new bermudagrass accessions and cultivars

IF 2 3区农林科学 Q2 AGRONOMY

Agronomy Journal Pub Date : 2024-07-20 DOI:10.1002/agj2.21643

Carlos Cristobal Vela García, José Carlos Batista Dubeux Jr, João Mauricio Bueno Vendramini, Esteban Fernando Rios, Erick Rodrigo da Silva Santos, David Mirabedini Jaramillo, Luana Mayara Dantas Queiroz, Rayanne Thalita Almeida de Souza, Bruno Grossi Costa Homem, Martin Ruiz-Moreno, Vanessa Zirondi Longhini, Flávia Oliveira Scarpino van Cleef, Mércia Virginia Ferreira dos Santos

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引用次数: 0

Abstract

Bermudagrass [Cynodon dactylon (L.) Pers.] is an important forage source for ruminants in tropical and subtropical regions of the world; nevertheless, little is known about the productive and nutritional characteristics of new accessions and cultivars originating from breeding programs. Five bermudagrass cultivars (Tifton 85, Jiggs, Florida 44, Callie, and Newell) and five accessions (276, 282, 323, 286, and Missouri) were tested during the 2018 and 2019 growing seasons. Genotype × harvest interactions were detected for herbage accumulation (HA), crude protein (CP), and nitrogen yield (p < 0.05). In June, all bermudagrass genotypes showed significant variation in HA, with accession 286 being more productive than Jiggs (4.42 vs. 3.24 Mg DM ha⁻¹ harvest⁻¹, respectively, where DM is dry matter). In October, however, accession 323 had greater CP than Callie, accession 286, Newell, and Tifton 85, with average CP values of 155, 128, 136, and 137 g kg⁻¹ DM, respectively. Average in vitro digestible organic matter for accession 323 (450 g kg⁻¹ DM) was similar to that of Tifton 85 and Newell but greater than that of Missouri (393 g kg⁻¹ DM). Genotypes displayed unique responses to all traits across harvest dates. According to the principal component analysis, the accession Missouri exhibited low productive and nutritive value properties. The accession 286 showed greater CP concentration while still productive; thus, this accession will be further examined for future release to livestock or hay producers in subtropical regions worldwide.

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百慕大草新品种和栽培品种的垃圾积累和营养价值

百慕大草[Cynodon dactylon (L.) Pers.]是世界热带和亚热带地区反刍动物的重要饲料来源；然而，人们对育种计划产生的新登录品种和栽培品种的产量和营养特性知之甚少。在 2018 年和 2019 年生长季节，对五个百慕大草栽培品种（Tifton 85、Jiggs、Florida 44、Callie 和 Newell）和五个登录品种（276、282、323、286 和 Missouri）进行了测试。在草料积累（HA）、粗蛋白（CP）和氮产量方面检测到基因型 × 收获相互作用（p < 0.05）。6 月份，所有百慕大草基因型在 HA 方面都表现出显著差异，286 号品种比 Jiggs 品种产量更高（分别为 4.42 对 3.24 Mg DM ha-1 harvest-1，其中 DM 为干物质）。但在 10 月份，323 号品种的 CP 值高于 Callie、286 号品种、Newell 和 Tifton 85，平均 CP 值分别为 155、128、136 和 137 g kg-1 DM。323 号品种的平均体外可消化有机物（450 g kg-1 DM）与 Tifton 85 和 Newell 相似，但高于密苏里（393 g kg-1 DM）。不同收获期的基因型对所有性状都表现出独特的反应。根据主成分分析，品种密苏里的产量和营养价值都较低。因此，将对该品种进行进一步研究，以便将来向全球亚热带地区的牲畜或干草生产者推广。

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

Agronomy Journal 农林科学-农艺学

CiteScore

4.70

自引率

9.50%

发文量

265

审稿时长

4.8 months

期刊介绍： After critical review and approval by the editorial board, AJ publishes articles reporting research findings in soil–plant relationships; crop science; soil science; biometry; crop, soil, pasture, and range management; crop, forage, and pasture production and utilization; turfgrass; agroclimatology; agronomic models; integrated pest management; integrated agricultural systems; and various aspects of entomology, weed science, animal science, plant pathology, and agricultural economics as applied to production agriculture. Notes are published about apparatus, observations, and experimental techniques. Observations usually are limited to studies and reports of unrepeatable phenomena or other unique circumstances. Review and interpretation papers are also published, subject to standard review. Contributions to the Forum section deal with current agronomic issues and questions in brief, thought-provoking form. Such papers are reviewed by the editor in consultation with the editorial board.