羔羊放牧热带草地和豆科牧草的物理生化特性

IF 1.1 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY
Viviane da Silva Hampel, Cesar Henrique Espírito Candal Poli, Jalise Fabíola Tontini, Margalida Joy, Carlos Nabinger, Thais Devincenzi, Eliseu Rodrigues, Vitor Manfroi, Neuza Maria Fajardo
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引用次数: 0

摘要

大面积的热带草地没有羊羔放牧,因为很难管理高选择性动物的高生长速度草地。本研究的目的是评价热带牧场连续放牧羔羊的物理生化特性。在3种牧草类型中分别设置了直立草和灌丛豆科植物,并进行了羔羊放牧:(1)单养阿鲁纳草(AG-Panicum maximum Jacq)。简历。(2)单栽培鸽豆(PP-Cajanus cajan) [L]。Millsp。简历。(3)相邻草地(CS),围场一半为AG (CSAG),一半为PP (CSPP)。在连续放牧92 d的时间里,分4期对羔羊的结构特征、产量、营养成分和抗氧化剂浓度进行评价。采集与动物饲料相似的手拔标本进行化学分析。在高度方面,PP豆科单作放牧42 d后,羔羊生长不可控,高度达到1.2 m。在整个试验期间,该豆科植物均保持较低且相近的株高。总体而言,不同牧草的叶茎比在试验期由0.7降至0.2。在大多数时期,与AG和PP相比,CS的营养品质处于中等水平。草地间α -生育酚含量相近,平均为137.2±13.67 mg/kg (p > 0.05)。在第63天和第92天,鸽豆的总单宁和浓缩单宁含量最高(p < 0.05)。与单一栽培相比,热带草与豆科植物的混合使用为放牧羔羊提供了更好的鸽豆物理结构。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Physical and biochemical characteristics of tropical grass and legume pastures grazed by lambs

Large areas of tropical grass pastures are not grazed by lambs because of the difficulties in managing high growth rate swards with high selective animals. The objective of this study was to evaluate the physical and biochemical characteristics of tropical pastures offered to lambs in continuous grazing. An upright grass and a shrub legume were set out in three pasture types and grazed by lambs: (1) aruana grass monoculture (AG—Panicum maximum Jacq. cv. IZ-5), (2) pigeon pea monoculture (PP—Cajanus cajan [L.] Millsp. cv. Anão) and (3) contiguous swards (CS), half of the paddock with AG (CSAG) and half with PP (CSPP). The pastures were evaluated for structural characteristics, production, nutritional composition and antioxidant concentrations in four periods over 92 days of continuous grazing by lambs. Hand plucking samples, similar to animal diet, were collected for chemical analysis. Regarding height, the PP legume monoculture after 42 days of grazing had uncontrollable growth by the lambs, reaching 1.2 m in height. This same legume but as a CS beside AG (CSPP) was maintained at a lower and similar height throughout the experimental periods. In general, the leaf:stem ratio of the different pastures decreased over the experimental periods from 0.7 to 0.2. In most periods, the CS showed intermediary nutritional quality compared to AG and PP. The alpha-tocopherol content was similar among swards, with an average of 137.2 ± 13.67 mg/kg of green matter (p > .05). Pigeon pea showed the highest levels of total tannin and condensed tannin at 63 and 92 days (p < .05). The use of tropical grass together with a legume provides a better physical structure of the pigeon pea for grazing lambs than when monoculture of this species.

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来源期刊
Grassland Science
Grassland Science Agricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
2.70
自引率
7.70%
发文量
38
审稿时长
>12 weeks
期刊介绍: Grassland Science is the official English language journal of the Japanese Society of Grassland Science. It publishes original research papers, review articles and short reports in all aspects of grassland science, with an aim of presenting and sharing knowledge, ideas and philosophies on better management and use of grasslands, forage crops and turf plants for both agricultural and non-agricultural purposes across the world. Contributions from anyone, non-members as well as members, are welcome in any of the following fields: grassland environment, landscape, ecology and systems analysis; pasture and lawn establishment, management and cultivation; grassland utilization, animal management, behavior, nutrition and production; forage conservation, processing, storage, utilization and nutritive value; physiology, morphology, pathology and entomology of plants; breeding and genetics; physicochemical property of soil, soil animals and microorganisms and plant nutrition; economics in grassland systems.
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