Establishing the appropriate model of height-weight relationship of two key species of Dactylis glomerata and Bromus tomentosus to estimate utilization of Javaherdehs’ rangeland of Ramsar

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mahmoudi mahdie; EBRAHIMI ATAOLLAH; jouri hassan; tahmasebi pejman

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Journal: Journal of Range and Watershed Managment Year:2018 | Volume:70 | Issue:4 Page(s): 991-1003

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Title

Establishing the appropriate model of height-weight relationship of two key species of Dactylis glomerata and Bromus tomentosus to estimate utilization of Javaherdehs’ rangeland of Ramsar

Author(s)

mahmoudi mahdie | EBRAHIMI ATAOLLAH | jouri hassan | tahmasebi pejman | Issue Writer Certificate

Keywords

RangelandQ2

Proper UseQ2

Height-Weight profileQ1

Dactylis glomerataQ1

Bromus tomentosusQ2

Abstract

The evaluation of utilization of key species is cornerstone of decision-making in Rangeland management. Measuring utilization is essential for regulating grazing intensity, grazing pressure and distribution of animals. utilization of two key grass species of Dactylis glomerata and Bromus tomentosus, as two important Rangeland species is determined using height-weight relationship. The research is done in two vegetative periods of prior to flowering and flowering stages in two region of grazing land and exclosure by 32 transects of 100-meter length. To do so, the height of species was measured and cut at 1-cm above soil surface and weighted freshly. The samples are clumped and moved to the laboratory and oven dried at 65° c after separating litter divisions Then, the whole individual plants were weighted and cut in 5-cm intervals and each part was re-weighted and recorded separately for each species. Height-weight relationships were analyzed by different regression models in SPSS v. 18 software. Result shows that sigmoid model significantly illustrate the height-weight relationship of both species of Dactylis glomerata and Bromus tomentosus with R2=0. 994 and 0. 997 at prior to flowering stage in the exclouser respectively. Similarly, sigmoid model also elucidate the height-weight relationship of both species of Dactylis glomerata and Bromus tomentosus with R2=0. 975 and 0. 998 at the flowering stage in the exclouser, respectively. The sigmoid model also best fitted for depicting height-weight relationship of both species at prior to flowering stage in grazing land for both species with R2=0. 996, too.

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APA: Copy

mahmoudi, mahdie, EBRAHIMI, ATAOLLAH, jouri, hassan, & tahmasebi, pejman. (2018). Establishing the appropriate model of height-weight relationship of two key species of Dactylis glomerata and Bromus tomentosus to estimate utilization of Javaherdehs’ rangeland of Ramsar. JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES), 70(4 ), 991-1003. SID. https://sid.ir/paper/162537/en

Vancouver: Copy

mahmoudi mahdie, EBRAHIMI ATAOLLAH, jouri hassan, tahmasebi pejman. Establishing the appropriate model of height-weight relationship of two key species of Dactylis glomerata and Bromus tomentosus to estimate utilization of Javaherdehs’ rangeland of Ramsar. JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES)[Internet]. 2018;70(4 ):991-1003. Available from: https://sid.ir/paper/162537/en

IEEE: Copy

mahdie mahmoudi, ATAOLLAH EBRAHIMI, hassan jouri, and pejman tahmasebi, “Establishing the appropriate model of height-weight relationship of two key species of Dactylis glomerata and Bromus tomentosus to estimate utilization of Javaherdehs’ rangeland of Ramsar,” JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES), vol. 70, no. 4 , pp. 991–1003, 2018, [Online]. Available: https://sid.ir/paper/162537/en

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