Bromatologic composition of the herbaceous species of the Northeastern Brazil Caatinga

Silva, D.S.; Andrade, Maria Verônica Meira de; Andrade, Alberício Pereira de; Carneiro, M. S. S.; Oliveira, Juliana

doi:10.1590/s1516-35982011000400008

Cited by 6 publications

(5 citation statements)

References 6 publications

(2 reference statements)

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“…Data presented in this study are consistent with the general observations of spatial, seasonal and species variation in terms of the quality of common grass species ( Mutanga et al, 2004 ; Mahala et al, 2009 ; da Silva, 2011 ). The CP content of individual grass species was declined as the stage of maturity increases from the main rain season towards the cool dry season.…”

Section: Discussionsupporting

confidence: 91%

Nutritive Value of Grasses in Semi-arid Rangelands of Ethiopia: Local Experience Based Herbage Preference Evaluation versus Laboratory Analysis

Keba

Madakadze

Angassa

et al. 2013

Asian Australas. J. Anim. Sci

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We examined the nutritive value of common grass species in the semi-arid rangelands of Borana in southern Ethiopia using local experience based herbage preference (LEBHP) perception and laboratory techniques. Local pastoralists in the study area were asked to identify common grass species and rank them according to the species’ preferences and palatability to cattle. The pastoralists listed a total of 15 common grass species which were then sampled during the main rain and cold dry seasons and analyzed for crude protein (CP), Neutral Detergent Fiber (NDF), Acid Detergent Fiber (ADF) and ash content to verify pastoralists’ claim regarding the quality of individual species. The relative feed value (RFV) and dry matter digestibility (DMD) were also calculated using NDF and ADF contents. Spearman’s rank correlation was used to examine possible relationships between laboratory results and pastoralists’ experience on grass quality. Cenchrus ciliaris, Chrysopogon aucheri, Digitaria milanjiana, Eragrostis papposa and Panicum maximum were the top five species based on LEBHP perception. There were indications of inconsistency in terms of LEBHP perception among the different pastoral communities. The chemical composition of all grass species showed significant (p<0.05) variation between sites, seasons and species. The results showed that the CP values for the Borana rangelands were in the range of 8.7% in the main rain season to 5.1% for the cold dry season. The fiber constituents were relatively low in the main rain season compared to the cold dry season. Overall, Digitaria milanjiana had the highest CP (16.5%) content, while the least was recorded with Heteropogon contortus (10.8) and Aristida adoensis (9.8%) during the main rain season. It seems that the spatial variability of landscapes within the wider geographical regions, soil properties and texture, and land-use patterns probably contributed to site differences in species quality. Generally, the RFV of individual grass species was significantly (p<0.05) varied between and within sites. The ranking of species by pastoralists according to their preferences by cattle was highly correlated with the chemical composition of laboratory results of individual grass species with ‘r’ values for CP (0.94), ash (0.95), NDF (−0.98), ADF (−0.93) and ADL (−0.93). We suggest the complimentary use of LEBHP and laboratory techniques in evaluating the nutritive quality of rangeland forage species for sustainable animal production.

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Section: Discussionsupporting

confidence: 91%

Nutritive Value of Grasses in Semi-arid Rangelands of Ethiopia: Local Experience Based Herbage Preference Evaluation versus Laboratory Analysis

Keba

Madakadze

Angassa

et al. 2013

Asian Australas. J. Anim. Sci

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“…Caatinga vegetation consists of primarily small woody species and herbs, usually endowed with thorns and deciduous with leaf loss at the beginning of the dry season, in addition to cacti and bromeliads (da Silva et al 2011;Pereira Filho et al 2013). …”

Section: Introductionmentioning

confidence: 99%

“…In terms of forage, the Caatinga is very rich and diverse (Rodal and Sampaio 2002;da Silva et al 2011). However, over the course of the year, vegetation becomes sparse, which reduces the grazing time in animals and increases the need for supplementation .…”

Section: Introductionmentioning

confidence: 99%

Dorper × Santa Ines F1 crossbred lambs under different grazing times and supplement levels in tropical regions: performance and macromineral requirements

Assis

Silva

Júnior

et al. 2018

Italian Journal of Animal Science

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The objective of this study was to evaluate the performance and net requirements for calcium (Ca), phosphorus (P), magnesium (Mg), potassium (K) and sodium (Na) in Dorper Â Santa Ines F1 crossbred lambs under different grazing times and supplement levels. We used 36 uncastrated male lambs with initial body weights (BW) of 15.5 ± 1.9 kg. Twelve animals were used as a reference group, and the remaining 24 animals were divided into three treatments according to grazing time and supplement level: 9 h Â 1.2% BW, 6 h Â 0.84% BW and 3 h Â 0.48% BW. There were increases in the final BW, average daily gain (ADG) and dry matter intake (DMI) of pasture (p < .05) in lambs that grazed longer (9 h Â 1.2% BW). Feed efficiency (G/F ratio) was similar between the 9 h Â 1.2% BW and 6 h Â 0.84% BW groups and both the groups were greater than the 3 h Â 0.48% BW. However, there was a reduction in the DMI of concentrate, total DMI, and Ca, P, Mg and K intake (p < .05) for lambs that grazed longer. However, pasture DMI and sodium intake increased (p < .05) in animals that grazed for less time (3 h). The chemical composition of the empty bodies in DM, fat, ash, Ca and P showed the greatest values (p < .05) in groups with animals grazing 9 h with a supplement level of 1.2% BW. Net maintenance requirements were 0.101-0.202 g Ca/day, 0.204-0.408 g P/day, 0.053-0.105 g Mg/day, 0.386-0.771 g K/day and 0.105-0.211 g Na/day for crossbred lambs between 15 and 30 kg BW. For the same group, net requirements to gain 100/200 g/day BW were 1.171/2.341-1.667/3.333 g Ca/day, 0.694/ 1.398-0.998/1.995 g P/day, 0.027/0.054-0.032/0.063 g Mg/day, 0.098/0.195-0.091/0.182 g K/day and 0.315/0.629-0.311/0.621 g Na/day. Lambs grazing longer (9 h Â 1.2% BW) displayed increased ADG and concentrate intake and reduced forage intake, which increased intake and body retention of Ca, P, Mg and K.ARTICLE HISTORY

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“…In general, forage species in the same botanical family which grew in the same season had similar phenotypical cycles. However, Caatinga forage species can have disparate growth cycles, likely associated to different plant survival strategies and environmental conditions such as conservation management strategies or soil chemical and physical properties (Silva et al, 2011).…”

Section: Carbohydrate and Nitrogen Fractions Of Caatinga Plants Selected By Ewesmentioning

confidence: 99%

Effect of concentrate supplement to ewes on nutritive value of ingested Caatinga native forage nutritive value as affected by season

Carvalho

Alves

Pompeu

et al. 2021

Trop Anim Health Prod

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The objective of this study was to identify by microhistological technique the reference chemical components for use as indicators of the nutritive value of Caatinga plants forage grazed by sheep throughout the year. A flock of twenty mixed-race meat ewes, multiparous, in production, with an average 34.84 ± 1.75 kg live weight and 36 months of age was assigned to supplement treatment of 0, 200, 350, and 500 g concentrate/head/day for 3 years. The experiment was designed as a randomized complete design with repeated measures over time. Supplementation with concentrate did not influence chemical composition of selected forage. In contrast, season heavily influenced diet chemical composition. Canopy stratum, season, and plant botanical family of selected species affected forage chemical composition selected by ewes. The ewes selected forage with greater nutritive value during the rainy season. Based on principal component analysis of the nutritive value of the primary forage species selected, ewes preferentially grazed plants contained greater neutral detergent fiber, acid detergent fiber, crude protein (CP), C fraction of nitrogenous compounds, and carbohydrate fractions A + B1 and C compared to the average native Caatinga herbage. Rangeland botanical composition and ewe diet varied during the year, affecting forage nutrients on offer, with the best diet selected during the rainy season because of the presence of dicotyledonous herbaceous species rich in CP as well as soluble carbohydrates and nitrogenous compounds. Concentrate supplement strategies for ewes on rangelands, such as Caatinga, should be determined by herbaceous species nutritive value during the rainy season and deep-rooted perennial dicotyledons during the dry season. These include the need to monitor ewe selection of forage species and their nutritive value, which is effectively accomplished with fecal microhistological techniques.

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Bromatologic composition of the herbaceous species of the Northeastern Brazil Caatinga

Cited by 6 publications

References 6 publications

Nutritive Value of Grasses in Semi-arid Rangelands of Ethiopia: Local Experience Based Herbage Preference Evaluation versus Laboratory Analysis

Nutritive Value of Grasses in Semi-arid Rangelands of Ethiopia: Local Experience Based Herbage Preference Evaluation versus Laboratory Analysis

Dorper × Santa Ines F1 crossbred lambs under different grazing times and supplement levels in tropical regions: performance and macromineral requirements

Effect of concentrate supplement to ewes on nutritive value of ingested Caatinga native forage nutritive value as affected by season

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