Organic zinc and copper supplementation on antioxidant protective mechanism and their correlation with sperm functional characteristics in goats          下载免费PDF全文

M Narasimhaiah  A Arunachalam  S Sellappan  VK Mayasula  PR Guvvala  SK Ghosh  V Chandra  J Ghosh  H Kumar 《Reproduction in domestic animals》2018,53(3):644-654

Trace minerals feeding had significant effects on sperm production and fertility with better absorption and proper utilization within the body for optimum reproductive function. Several studies have shown that more influenced trace elements in the diets of animals are copper (Cu) and zinc (Zn). Bucks showing deficiency of this mineral might affect the quality of semen production which in turn would affect the fertility. This experiment was thus designed to test the effects of organic Cu and Zn supplementation on antioxidants enzyme activities and sperm functional attributes in fresh semen of bucks. Forty bucks (n = 40, Aged 5 months) were assigned to ten groups of four animals in each group, supplemented (for a period of 8 months) with different levels of organic Zn: 20 mg (T2), 40 mg (T3) and 60 mg (T4), organic Cu: 12.5 mg (T5), 25 mg (T6), 37.5 mg (T7) and combined organic Zn and Cu: 20 + 12.5 mg (T8), 40 + 25 mg (T9), 60 + 37.5 mg (T10), respectively, per kg dry matter and no additional mineral diet (control; T1). One hundred and sixty semen samples were collected through electro‐ejaculator and analysed for sperm quantity, quality, acrosome intactness and plasma membrane integrity and correlated with the catalase, superoxide dismutase, glutathione peroxidase and glutathione reductase enzyme activities in seminal plasma. The results indicated organic Cu and zinc supplemented bucks produced more sperm cells, had higher sperm concentrations, maintained higher (p < .01) sperm livability, plasma membrane and acrosome integrities, more motility and velocity. The increased antioxidant enzyme activities, reduced oxidative stress and lowered lipid peroxidation were positively correlated (p < .05) with the sperm functional attributes. In conclusion, organic Cu and Zn supplement to male goats showed protective roles against oxidative damage and maintained better fresh semen characteristics.  相似文献   

Spermatogenesis and related plasma androgen and progestin level in wild male golden mahseer,Tor putitora (Hamilton, 1822), during the spawning season     

Neetu Shahi  Sumanta Kumar Mallik  Jyoti Pande  Partha Das  Atul Kumar Singh 《Fish physiology and biochemistry》2015,41(4):909-920

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Symbiotic N<Subscript>2</Subscript> fixation and nitrate utilisation in irrigated lucerne (<Emphasis Type="Italic">Medicago sativa</Emphasis>) systems     

Huimin Yang  Murray Unkovich  Ann McNeill  Xianzhi Wang 《Biology and Fertility of Soils》2011,47(4):377-385

Symbiotic N₂ fixation by lucerne (Medicago sativa) has capacity to provide significant inputs of N to agro-ecosystems, and the species has also been shown to scavenge soil mineral N and thus act as a sink for excess reactive N. The balance between these two N cycle processes was investigated in an extensive irrigated lucerne growing region where nitrate contamination of groundwater has been reported. We sampled 18 permanent pure lucerne stands under irrigation for standing dry matter, total shoot N, and N₂ fixation using ¹⁵N natural abundance along with activity of the inducible enzyme nitrate reductase as indicators of use of soil NO₃⁻ by lucerne. On average 65% of lucerne N was obtained from symbiotic N₂ fixation. Converting standing dry matter estimates to annual N₂ fixation amounts we calculated average N₂ fixation of 311 kg N/ha, including N in roots and nodules. Uptake of N from soil by lucerne was calculated to be 181 kg N/ha/year. We were not able to identify the source of this soil mineral N, although nitrate reductase activity of lucerne was higher than that of non-N₂ fixing species examined.  相似文献   

E. Melanie DuPuis: Nature’s perfect food: how milk became America’s drink     

Evan Perrault 《Agriculture and Human Values》2011,28(4):583-584

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Books received     

Carol J. Pierce Colfer 《Agriculture and Human Values》2011,28(4):589-590

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Performance evaluation of forest co-management: a case study of Chunati Wildlife Sanctuary,Bangladesh     

Umma Tamima 《林业研究》2016,27(4):853-861

The objective was to evaluate the performance of the co-management of Nishorgo Support Project at Chunati Wildlife Sanctuary in Bangladesh. I adopted the Focus Groups Discussion method for opinion survey and applied the SWOTAHP technique for data analysis. Local people did not participate in the decision-making process of forest management and they perceived co-management as a threat to their livelihoods. Moreover, mistrust and misunderstanding among different stakeholders, political and ethical conflicts, lack of property rights of tribal communities, and lack of accountability and transparency were identified as the drawbacks of co-management.  相似文献   

Copper nanoparticle induced macromutation in Macrotyloma uniflorum (Lam.) Verdc. (Leguminosae): a pioneer report     

Sandip Halder  Aninda Mandal  Debadrito Das  Sudha Gupta  Asoke Prasun Chattopadhyay  Animesh Kumar Datta 《Genetic Resources and Crop Evolution》2015,62(2):165-175

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Jody Emel and Harvey Neo: Political ecologies of meat     

Heide K. Bruckner 《Agriculture and Human Values》2016,33(3):739-740

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Brian K. Obach: Organic struggle: the movement for sustainable agriculture in the United States     

Kelly Yearick 《Agriculture and Human Values》2017,34(2):505-506

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Changes in vasotocin levels in relation to ovarian development in the catfish Heteropneustes fossilis exposed to altered photoperiod and temperature     

Radha Chaube  Rahul Kumar Singh  Keerikattil P. Joy 《Fish physiology and biochemistry》2015,41(5):1173-1186

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