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Effect of grazing time and intensity on growth and yield of spring wheat(Triticum aestivum L.)

Journal of Integrative Agriculture 2019年第5期18卷 1138-1147页

作者： ketema tilahun zeleke School of Agricultural & Wine Sciences Charles Sturt University Graham Centre for Agricultural Innovation

A simulated grazing field experiment was conducted to determine the effect of timing and intensity of grazing on the growth and yield of a mid-late maturing spring wheat(cv. Flanker) under different watering regimes, at Wagga Wagga in southeastern Australia. The experiment was a factorial design of watering regime and pasture "grazing" as factors, with three replications. The two watering regimes were rainfed(R) and supplemental irrigation(I). There were four simulated grazing treatments: no grazing, "crash" grazing by mowing to 5 cm height on 13 June(Cut1-5), "crash" grazing by mowing to 5 cm on 15 July(Cut2-5) and "clip" grazing by mowing to 15 cm height on 15 July(Cut2-15). The lowest dry matter(simulated grazing) was obtained from RCut1-5(0.13 t ha^(–1)) and the highest(0.86 t ha^(–1)) was from ICut2-5. There was no significant difference(P0.05) by either the watering regime or grazing. Seed weight was significantly(P<0.05) affected both by the watering regime and grazing with the lowest value for 1 000-seed weight of 30.05 g(RCut2-5) and the highest value of 38.00 g(ICut2-15). Water use efficiency was significantly(P<0.05) affected both by the watering regime and grazing with the lowest value of 9.94 kg ha^(–1) mm^(–1)(ICut2-5) and the highest value 13.43 kg ha^(–1) mm^(–1)(RCut2-5). By "crash" grazing late(just before stem elongat

关键词： dual-purpose crop productivity simulated grazing wheat

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Husbandry, Productivity and Producers Trait Preference of Goats in North Western Lowlands of Ethiopia

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Open Journal of Animal Sciences 2020年第2期10卷 313-335页

作者： tilahun Debela Mengistu Urge Getnet Assefa zeleke Mekuriaw Pawe Agriculture Research Center Pawe Ethiopia School of Animal and Rangeland Sciences Haramaya University Dire Dawa Ethiopia Ethiopian Agricultural Research Institute Addis Ababa Ethiopia International Livestock Research Institute Addis Ababa Ethiopia

A survey was conducted in Agalo Meti, Bambasi and Mandura districts of Kamashi, Assosa and Metekel zones of Benishangul-Gumuz Regional State, respectively. The aim of the study was to assess production characteristics, productive performances and producer’s traits preference of goats. A total of 177 households who have goat flock and experience in goat production were purposively selected. Data was collected through respondent interviews using structured questionnaire, focus group discussions, key informant interviews and field visit. Data was analyzed using SPSS software and reported using descriptive statistics. Indices were used to present ranking. Farming is characterized by mixed-crop livestock production system and livestock are kept under traditional extensive management system. Greater number of goats than other livestock species were owned in the area. The indigenous goats reared in the area include Arab, Felata and Gumuz. The mean goat flock size per household was 9.81 ± 1.08, 8.31 ± 1.16 and 8.71 ± 0.88 in Agalo Meti, Bambasi and Mandura district, respectively. Goats were primarily kept for generating income (indices = 0.43), followed by saving/insurance (0.34), and meat for home consumption (0.18). About 58% of the producers sell goat skins, whereas (42%) did not-sold through the formal market chain. Natural pasture and indigenous browse species were the major feed resources. About 89.3% of the respondents housed their goats in a well-shaded separately constructed house. The herding practices of goats include: free-roaming all year round (67.8%) and restricted herding (32.2%) during the cropping season. The major constraints for goat production were infectious and parasitic diseases (0.45), inadequate veterinary services (0.39), predators (0.091), marketing problem (0.03) and poor management (0.01). Arab, Felata, and Gumuz goats give first birth at the age of 13.65 ± 0.40, 12.90 ± 0.29 and 12.54 ± 0.43 months, kidded at every 8.52 ± 0.41, 7.85 ± 0.25 and

关键词： Constraints Feed Resources Goats Husbandry Practice

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