DETERMINATION AND COMPARISON OF FORAGE QUALITY IN FIVE RANGE SPECIES AT DIFFERENT PHENOLOGICAL STAGES

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ARZANI HOSSEIN; AZARNIVAND H.; AHMADI ABAS

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Journal: IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE) Year:2006 | Volume:37 | Issue:2 Page(s): 303-311

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Title

DETERMINATION AND COMPARISON OF FORAGE QUALITY IN FIVE RANGE SPECIES AT DIFFERENT PHENOLOGICAL STAGES

Author(s)

ARZANI HOSSEIN | AZARNIVAND H. | AHMADI ABAS | Issue Writer Certificate

Keywords

PHENOLOGICAL STAGESQ3

FORAGE QUALITYQ3

RELATIVE FEED VALUEQ2

CRUDE PROTEINQ3

DRY MATTER DIGESTIBILITYQ2

METABOLIZABLE ENERGYQ2

SOLUBLE CARBOHYDRATESQ3

Abstract

In order to evaluate the grazing capacity as well as to implement an integrated management of rangelands, it is necessary to be aware of FORAGE QUALITY. The most important factor influencing FORAGE QUALITY is the plant growth stage, which presents the most suitable time for animal grazing. In this research, samples were taken (using randomized- systematic design) from three grasses and from two forbs, namely Agropyron tauri, Dactylis glomerata, Bromus tomentellus, Ferula ovina, and Coronilla varia. Samples were collected at three phonological stages of vegetative growth, full flowering, and seed ripening from summer ranges in central Alborz (Vardavard and Gachsar). Plant samples were dried, milled, and chemically analyzed for important qualitative factors such as: DM, NDF, ADF, CP, ME, DDM, DMI, WSC, RFV.Except for DM, there were significant differences (p<0.01) observed among different species as well as among different PHENOLOGICAL STAGES. Also, interaction effects of plant species and growth stages were observed to be significant for these factors. Almost in all species, the amount of CP, DDM and ME decreased with progressing growth stages, while ADF and NDF contents increased. In general, crown vetch (Coronilla varia) had the highest FORAGE QUALITY based on the assessed factors (RFV=257.9) and in this respect, Agropyron tauri possessed the lowest (RFV=92.1). F.ovina, D.glomerata and B.tomentellus respectively had a greater nutritive value after C.varia. Vegetative growth (first phenological stage), considering all nutritive factors (except WSC), benefited from higher values in comparison with the other stages. Considering low energy differences between first and second PHENOLOGICAL STAGES and also because of higher production, and pasture availability, the second stage (flowering) was determined as the most suitable period for animal grazing (in the frame work of grazing systems).

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APA: Copy

ARZANI, HOSSEIN, AZARNIVAND, H., AHMADI, ABAS,. (2006). DETERMINATION AND COMPARISON OF FORAGE QUALITY IN FIVE RANGE SPECIES AT DIFFERENT PHENOLOGICAL STAGES. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE), 37(2), 303-311. SID. https://sid.ir/paper/8674/en

Vancouver: Copy

ARZANI HOSSEIN, AZARNIVAND H., AHMADI ABAS. DETERMINATION AND COMPARISON OF FORAGE QUALITY IN FIVE RANGE SPECIES AT DIFFERENT PHENOLOGICAL STAGES. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE)[Internet]. 2006;37(2):303-311. Available from: https://sid.ir/paper/8674/en

IEEE: Copy

HOSSEIN ARZANI, H. AZARNIVAND, ABAS AHMADI, an, “DETERMINATION AND COMPARISON OF FORAGE QUALITY IN FIVE RANGE SPECIES AT DIFFERENT PHENOLOGICAL STAGES,” IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE), vol. 37, no. 2, pp. 303–311, 2006, [Online]. Available: https://sid.ir/paper/8674/en

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