Nutritive value of some Zagros Mountain rangeland species

Hossein, Arzani; Basiri, M.; Khatibi, Farzaneh Shaikh; Ghorbani, G.R.

doi:10.1016/j.smallrumres.2005.05.033

Cited by 41 publications

(34 citation statements)

References 17 publications

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“…Babayemi and Bamikole (2006) and Mebrahtu and Tenaye (1997) both reported that higher in vitro gas production of a feed is an indication of higher digestibility and release of nutrient from feed samples. Metabolisable energy of hay, silage and L. leucocephala leaves in this study was in line with NRC (2001) that reported ME content of 8.6 MJ/kg DM for Pennisetum purpureum while Arzani et al (2006) reported mean ME content of 7.75 MJ/kg DM for grasses. In a study carried out by Ozelcam et al (2015) on Lolium multiflorum (caramba), highest values for in vivo metabolizable energy were found in silage and fresh form (7.83 and 7.72 MJ/kg DM respectively), followed by the hay form (6.77 MJ/kg DM).…”

Section: Post Incubation Parameterssupporting

confidence: 90%

Valor nutritivo de los recursos alimenticios procesados procedentes de pastos naturales en South-West, Nigeria

et al. 2017

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El valor nutritivo de recursos forrajeros de pastos naturales alimenticios en la estación seca para los animales en pastoreo fueron evaluados a partir de su composición química y producción de gas in vitro. Los recursos forrajeros incluyen forrajes conservados (henos y ensilado), planta arbustiva (hojas de Leucaena leucocephala) utilizando como control los forrajes del pasto natural durante la estación seca. El contenido de proteína bruta (CP) de los recursos forrajeros osciló de 59 a 171 g/k-l de materia seca (DM), siendo las hojas de L. leucocephala las que presentaron el mayor (p

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Section: Post Incubation Parameterssupporting

confidence: 90%

Valor nutritivo de los recursos alimenticios procesados procedentes de pastos naturales en South-West, Nigeria

et al. 2017

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“…The decreased N contents with sheep grazing could mainly be due to redistribution of N inputs and the standing plant biomass removal and consumption by sheep because other soil forming factors (i.e., soil type, parent materials, topography, and climate) were relatively constant for grazed and ungrazed rangelands. Furthermore, the presence of perennial legume species, such as Coronilla varia L., Lotus corniculatus L., Onobrychis sativa L., can increase soil N contents under ungrazed conditions, since the N 2 -fixing legumes with more forage digestibility (Arzani et al 2006) are consumed by sheep under grazed conditions and therefore are less abundant in grazed than ungrazed areas of Zagros Mountain rangelands (Arzani et al 2006). Similarly, substantial decreases in soil N as a result of heavy livestock grazing were reported in other arid and semi-arid grasslands (He et al 2009;Jeddi and Chaieb 2010;Liu et al 2011;Qi et al 2011).…”

Section: Discussionmentioning

confidence: 99%

Bulk soil and particle size-associated C and N under grazed and ungrazed regimes in Mountainous arid and semi-arid rangelands

Ghorbani

Raiesi

Ghorbani

2012

Nutr Cycl Agroecosyst

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Sheep grazing is known to influence soil organic carbon (SOC) storage and dynamics in rangelands. However, very little is known of grazing impacts on measurable SOC pools associated with primary particles, particulate organic matter (POM) and carbohydrates in the heavily grazed rangelands of Zagros Mountains, Iran. Bulk SOC, total nitrogen (N), POM and hot-water extractable carbohydrates (HWC) as well as different SOC and N fractions in particle-size separates were studied in natural mountainous rangelands of arid (Boroujen with 255 mm annual rainfall) and semi-arid (Sabzkouh with 860 mm annual rainfall) sites, Central Zagros. Two sheep grazing regimes including grazed and ungrazed (for 20-25 years) rangelands with four replicates were identified as the grazing treatments at each site. Soil samples (0-15 cm) were taken and analyzed for bulk SOC, total N, POM, HWC, and SOC and N associated with physical fractions. Bulk SOC contents were similar for both ungrazed and grazed regimes, while total N contents significantly decreased under grazed conditions. Bulk soil POM and HWC contents decreased considerably and clearly by sheep grazing, indicating that these fractions of total soil organic matter (SOM) pool may be suitable indicators for detecting the grazing effects on bulk SOC changes and storage in these arid and semi-arid ecosystems. Semi-arid rangeland sites contained more bulk SOC, total N and POM contents than arid rangeland sites. These differences were primarily due to the large differences in vegetation composition, annual rainfall and soil conditions between the two rangelands. After 20-25 years of grazing over 10-33 % of SOC and total N losses occurred in the sand-and clay-size fractions with 10 % increases in the silt fraction. This means sheep grazing increases the contribution of the silt fraction to bulk soil N. We found evidence that sheep grazing decreases soil POM and HWC pools, and the sand fraction C, suggesting a lower recent annual input of decomposable organic C in heavily grazed rangelands. Sheep grazing had no influence on the potential C mineralization of the bulk soil at the semi-arid site (Sabzkouh), but reduced C mineralization at the arid-site (Boroujen), indicating that sheep grazing may affect SOC dynamics by changes in substrate quality at the former, but by substrate quantity at the later. In brief, long-term sheep grazing can potentially lead to losses of both labile and no-labile SOM in these arid and semi-arid rangelands.

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“…TtNAM-B1 (DQ869672) corresponds to NAM-B1 protein sequence for Triticum turgidum; NAM_Domain_A-B-C-D-E correspond to sequences of the NAM subdomain A, B, C, D and E from TtNAM-B1 (DQ869672) sequence; HvNAM-1 (DQ869678) corresponds to protein sequence related to the 11 European varieties of Hordeum vulgare; HsNAM-AZER corresponds to protein sequence from Hordeum spontaneum from Azerbaidjan (EU908210) and HbNAM-ALBA corresponds to protein sequence from Hordeum bulbosum from Albania (EU908211), using the Multalign algorithm. An estimation of GPC for H. bulbosum, based on Arzani et al (2006), was also used to compare to the GPC values measured for cultivated barley of this work. Arzani et al (2006) showed a mean GPC value of 7.80% for H. bulbosum, which was the lowest GPC among 22 different species.…”

Section: Gpc Determinationmentioning

confidence: 99%

“…An estimation of GPC for H. bulbosum, based on Arzani et al (2006), was also used to compare to the GPC values measured for cultivated barley of this work. Arzani et al (2006) showed a mean GPC value of 7.80% for H. bulbosum, which was the lowest GPC among 22 different species. Compared to measurements of GPC made in this study for cultivated barley, it is also a lower value.…”

Section: Gpc Determinationmentioning

confidence: 99%