GERMINATION CHARACTERISTICS AND CARDINAL TEMPERATURES OF LAMBSQUARTER, PURSELANE AND CRABGRASS

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POURTOUSI N.; RASHED MOHASEL M.H.; IZADI DARBANDI E.

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Journal: Iranian Journal of Field Crops Research Year:2008 | Volume:6 | Issue:2 Page(s): 255-261

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Information Journal Paper

Title

GERMINATION CHARACTERISTICS AND CARDINAL TEMPERATURES OF LAMBSQUARTER, PURSELANE AND CRABGRASS

Author(s)

POURTOUSI N. | RASHED MOHASEL M.H. | IZADI DARBANDI E. | Issue Writer Certificate

Keywords

GERMINATIONQ2

BASE TEMPERATUREQ2

OPTIMUM TEMPERATUREQ2

CIELING TEMPERATUREQ2

Abstract

In order to study the cardinal temperatures of lambsquarter (Chenopodium album), purselane (Protulace oleracea), crab grass (Digitaria sanguinalis) and also predicting their emergence time within the fields an experiment was conducted in Weeds Research Labratory, Faculty of Agriculture, Ferdowsi University of Mashhad in 2005.The type of experiment was a completely randomized design with 9 treatment and three replications was used. Treatments consisted of 9 constant temperatures (5, 10, 15, 20, 25, 30, 35, 40 and 45oC) with 50 percent relative humidity and constant light radiation for 14 days. The germinated seeds were counted everyday and the rate of GERMINATION percentage, cumulative GERMINATION and cardinal temperatures were calculated. The cardinal temperatures including BASE TEMPERATURE (Tb), OPTIMUM TEMPERATURE (To) and CIELING TEMPERATURE (Tc) for lambsquarter was 4,29.5 and 43.3oC for purslane 11.8,35 and 49.3oC and for crab grass it were 14.16,25/6 and 41.3°C respectively.The results indicated that lambsquarter with lower Tb and To is able to germinate when it is cooler and thus it will be dominant early in the season, Gradually, when the weather is getting warmer, purselane and then crab grass will dominate and invade the fields. On the whole, due to differences in physiologic of aspects and rate of weed growth the GERMINATION peak differs within fields.

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APA: Copy

POURTOUSI, N., RASHED MOHASEL, M.H., & IZADI DARBANDI, E.. (2008). GERMINATION CHARACTERISTICS AND CARDINAL TEMPERATURES OF LAMBSQUARTER, PURSELANE AND CRABGRASS. IRANIAN JOURNAL OF FIELD CROPS RESEARCH, 6(2), 255-261. SID. https://sid.ir/paper/119100/en

Vancouver: Copy

POURTOUSI N., RASHED MOHASEL M.H., IZADI DARBANDI E.. GERMINATION CHARACTERISTICS AND CARDINAL TEMPERATURES OF LAMBSQUARTER, PURSELANE AND CRABGRASS. IRANIAN JOURNAL OF FIELD CROPS RESEARCH[Internet]. 2008;6(2):255-261. Available from: https://sid.ir/paper/119100/en

IEEE: Copy

N. POURTOUSI, M.H. RASHED MOHASEL, and E. IZADI DARBANDI, “GERMINATION CHARACTERISTICS AND CARDINAL TEMPERATURES OF LAMBSQUARTER, PURSELANE AND CRABGRASS,” IRANIAN JOURNAL OF FIELD CROPS RESEARCH, vol. 6, no. 2, pp. 255–261, 2008, [Online]. Available: https://sid.ir/paper/119100/en

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