ali ehsani; Mohammad fayaz; Hamze Ali Shirmardi; seyd ali hoseini; Kazem saedi; Mohammadreza shooshtari; jamal hasani
Volume 22, Issue 3 , November 2015, , Pages 558-569
Hosein Arzani; Javad Moetamedi; Seyed Ali Hoseini
Volume 21, Issue 4 , March 2015, , Pages 651-662
Abstract
Knowledge of forage quality is of paramount importance for livestock and rangeland management. For this purpose, the forage quality of range species was investigated in summer rangelands of Saraliabad, Golestan province to meet daily animal unit requirement. In the present study, 12 rangeland species ...
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Knowledge of forage quality is of paramount importance for livestock and rangeland management. For this purpose, the forage quality of range species was investigated in summer rangelands of Saraliabad, Golestan province to meet daily animal unit requirement. In the present study, 12 rangeland species including Achillea millifolium, Agropyron trichophorum, Centurea zuvandica, Crepis khorassanica, Koeleria cristata, Medicago sativa, Poa angustifolia, Taraxacum brevidens, Thymus transcaspicus, Tragopogon graminifolius, Trifolium repens and Artemisia aucheri were sampled at three different phenological stages (vegetative, flowering and seeding) in 2009. In each stage, three samples and for each sample three individuals were cut. Then, forage quality indices were calculated. Results showed that the crude protein values at all growth stages were higher than the critical level (7.0%) to meet daily animal unit requirement. In addition, dry matter digestibility values in vegetative and flowering stages were higher than the critical level (50%) to meet daily animal unit requirement, contrary to the seeding stage. Metabolisable energy values in vegetative stage were higher and in flowering and seeding stages were lower than the critical level (8Mj) to meet daily animal unit requirement. Our results clearly showed that the forage quality of range species varied at different growth stages, indicating that daily animal unit requirement need be determined based on forage quality. The results of this study could be used in determining the daily animal unit requirement in different years since measuring forage quality is costly.
Ghasemali Dianatitilaki; Manijeh Tavan; Ali Hosseini; Mansur Mesdaghi
Volume 17, Issue 2 , September 2010, , Pages 180-190
Abstract
Determination of forage quality is one of the fundamental factors for sound management of rangelands. Nitrogen and phosphorus fertilization of rangelands causes increasing forage quality. In this study, forage quality of Eruca sativa in three years (2004, 2005 and 2006) were measured in flat and northern ...
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Determination of forage quality is one of the fundamental factors for sound management of rangelands. Nitrogen and phosphorus fertilization of rangelands causes increasing forage quality. In this study, forage quality of Eruca sativa in three years (2004, 2005 and 2006) were measured in flat and northern sloppy rangelands in Maravehtapeh.In this study, 0, 50 and 100 kg N/ha and 0 and 25 kg P/ha fertilizer rates were applied. Forage quality index such as crude energy, crude protein, crude fiber, crude nitrogen and ADF (Acid Detergent Fiber) were measured in this study. Results showed that, nitrogen fertilizer increased the crude nitrogen, crude protein and crude energy and decreased the crude fiber and ADF. Phosphorus fertilization had few effects on forage quality. Nitrogen fertilization with 100 kg/ha increased forage quality. Forage quality rates increased in 2006 owing to optimum weather condition in this year. Forage quality rate is same in each flat and northern sloppy rangeland was the same. Interaction effects between two fertilizers in northern sloppy rangeland was significant.