STUDY THE GROWTH DEGREE DAYS REQUIREMENT FOR PHENOLOGICAL STAGES OF IMPORTANT RANGE SPECIES IN HOMAND

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MIRHAJI S.T.; SANAD GOL A.

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Journal: IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH Year:2006 | Volume:13 | Issue:3 (24) Page(s): 212-221

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Title

STUDY THE GROWTH DEGREE DAYS REQUIREMENT FOR PHENOLOGICAL STAGES OF IMPORTANT RANGE SPECIES IN HOMAND

Author(s)

MIRHAJI S.T. | SANAD GOL A. | Issue Writer Certificate

Keywords

GROWTH DEGREE DAYSQ3

HOMAND E ABESARDQ3

PHENOLOGICAL STAGESQ2

RANGE SPECIESQ3

Abstract

The PHENOLOGICAL STAGES of five species Festuca ovina, Koeleria macrantha, Koeleria phleoides, Melica cupani and Melica jacquemntii were studied for three years (2003-2005) in Homand-e-abesard rangeland research station, in 70 km east of Tehran. Annual life cycle of plants were divided into two large periods, more active and less active phases. data were recorded in the first phase every 7 days and in the second phase every 15 days. The Growth degree-days (GDD) were calculated for each phonological stages. 20 stands of each species were studied. The PHENOLOGICAL STAGES include: growth initiation (gi), vegetative growth (vg), heading out (ho), full flowering (ff), seed ripening (sr), seed maturity (sm), temporary dormancy (td) and regrowth. The result showed that the five species started their growth from early March and dried in late July. There was dormancy for late August to early October and a regrowth stage from late November to late December. The GROWTH DEGREE DAYS were calculated for each phenological stage of 5 species in the different years. The result showed no GDD variation for the same PHENOLOGICAL STAGES between years.

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APA: Copy

MIRHAJI, S.T., & SANAD GOL, A.. (2006). STUDY THE GROWTH DEGREE DAYS REQUIREMENT FOR PHENOLOGICAL STAGES OF IMPORTANT RANGE SPECIES IN HOMAND. IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH, 13(3 (24)), 212-221. SID. https://sid.ir/paper/106858/en

Vancouver: Copy

MIRHAJI S.T., SANAD GOL A.. STUDY THE GROWTH DEGREE DAYS REQUIREMENT FOR PHENOLOGICAL STAGES OF IMPORTANT RANGE SPECIES IN HOMAND. IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH[Internet]. 2006;13(3 (24)):212-221. Available from: https://sid.ir/paper/106858/en

IEEE: Copy

S.T. MIRHAJI, and A. SANAD GOL, “STUDY THE GROWTH DEGREE DAYS REQUIREMENT FOR PHENOLOGICAL STAGES OF IMPORTANT RANGE SPECIES IN HOMAND,” IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH, vol. 13, no. 3 (24), pp. 212–221, 2006, [Online]. Available: https://sid.ir/paper/106858/en

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