Identification and Determination of Density for the Dominant Weeds of Saffron (Crocus sativus L. ) Fields in Ghayenat

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JAVADZADEH SEYYED MAHDI

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Journal: JOURNAL OF SAFFRON RESEARCH Year:2019 | Volume:7 | Issue:1 Page(s): 69-81

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Title

Identification and Determination of Density for the Dominant Weeds of Saffron (Crocus sativus L. ) Fields in Ghayenat

Author(s)

JAVADZADEH SEYYED MAHDI | Issue Writer Certificate

Keywords

Average compressionQ1

Frequency of speciesQ1

Species dominanceQ1

Species uniformityQ1

Abstract

In order to identify and determine the frequency and density of weeds in saffron fields of Ghayenat, 15 fields were randomly selected based on cultivation area during 2014-2015. In each field, weeds were separately counted by species. Weed density was estimated by using a 0. 25 m2 frame. Fields with 1000-4000 m2 in extent were visited and samplings were carried out. The movement in these fields was done in the shape of “ W” . Sampling time was determined to be between March to Febuary and through using relations and formulas, Frequency of species, Species uniformity, Average compression and Species dominance were estimated and determined. The results showed that 84 weed species which belonged to the Asteraceae, Poaceae, Brassicaceae, Fabaceae, Polygonaceae, Chenopdiaceae and Malvaceae families had the highest frequency, respectively. The most important weeds according to the dominance index were brome chess (Bromus danthoniae), mouse barley (Hordeum murinum), bromus (Bromus scoparius), downy brome (Bromus tectorum), barley (Hordeum vulgare), from grasses and Russian knapweed (Acroptilon repens), (Cirsium arvense), pagoda (Sophora alepecurides) and turnsole (Heliotropium europaeum) from broad leaves. Annual weeds had the greatest species diversity (45 species), biennial weeds had the lowest species diversity (4 species), and the perennial were between the two groups (35 species). Eighty eight percent of weeds were broadleaf, and 12 percent were narrow leaf weeds. Therefore it is recommended that we use ecological management for weed control in saffron farms which leads to the stability and sustainability of the production as well as to reduce consumption of substances and chemical pesticides.

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APA: Copy

JAVADZADEH, SEYYED MAHDI. (2019). Identification and Determination of Density for the Dominant Weeds of Saffron (Crocus sativus L. ) Fields in Ghayenat. JOURNAL OF SAFFRON RESEARCH, 7(1 ), 69-81. SID. https://sid.ir/paper/397258/en

Vancouver: Copy

JAVADZADEH SEYYED MAHDI. Identification and Determination of Density for the Dominant Weeds of Saffron (Crocus sativus L. ) Fields in Ghayenat. JOURNAL OF SAFFRON RESEARCH[Internet]. 2019;7(1 ):69-81. Available from: https://sid.ir/paper/397258/en

IEEE: Copy

SEYYED MAHDI JAVADZADEH, “Identification and Determination of Density for the Dominant Weeds of Saffron (Crocus sativus L. ) Fields in Ghayenat,” JOURNAL OF SAFFRON RESEARCH, vol. 7, no. 1 , pp. 69–81, 2019, [Online]. Available: https://sid.ir/paper/397258/en

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