EFFECT OF WEATHER CONDITIONS ON COTTON FLOWER AND BOIL RETENTION IN GORGAN

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AKRAM GHADERI F.; SOLTANI A.A.F.; REZAI J.

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Journal: Journal of Agricultural Sciences and Natural Resources Year:2004 | Volume:10 | Issue:4 Page(s): 75-84

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Title

EFFECT OF WEATHER CONDITIONS ON COTTON FLOWER AND BOIL RETENTION IN GORGAN

Author(s)

AKRAM GHADERI F. | SOLTANI A.A.F. | REZAI J. | Issue Writer Certificate

Keywords

COTTON; WEATHER CONDITION; CULTIVAR; FLOWER AND BOLL SHEDDINGQ3

Abstract

Environmental conditions determine productivity of cotton at a given location. An experiment was conducted at Hashem-Abad Cotton Research Station, Gorgan during 2000 under irrigation condition. The objective of the study was to determine the effect of weather conditions on cotton flower and boil retention. To create different weather conditions during flowering and boIling period, different sowing dates were used. Experimental design was a split plot consisting 4 sowing date (24 April, 9 and 25 May and 9 June) as main factor and 3 cotton cultivars (Sahel, Siokra324 and Deltapine) as sub-factor. The percentage of flower and boIl shedding linearly increased with delay in sowing date in all the cultivars. An inverse linear relationship was observed between flower and boil shedding and yield for all cultivars. Cultivars showed different slope for the relationship and Siokra324 showed the lowest yield reduction as a function of the shedding. Shedding percentage in Sahel was twice greater than the other cultivars. Significant, positive correlations were found between shedding and mean air temperature ana the number of hot days (maximum temperature greater than 30-35°C), but negative, significant correlations were observed for wind speed and relative humidity. Thus, it was concluded that the most important factor is temperature and the effect of other factors (solar radiation, wind speed and relative humidity) is indirect via temperature. The evaluation of the probability of occurrence of hot days showed a high probability of these days during July and especially August. Therefore, it can be recommended that the cotton crops in Gorgan should be sown at first opportunity in spring during April, in order to avoid from high temperature at flowering and bolling stages during August.

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APA: Copy

AKRAM GHADERI, F., SOLTANI, A.A.F., & REZAI, J.. (2004). EFFECT OF WEATHER CONDITIONS ON COTTON FLOWER AND BOIL RETENTION IN GORGAN. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, 10(4), 75-84. SID. https://sid.ir/paper/9525/en

Vancouver: Copy

AKRAM GHADERI F., SOLTANI A.A.F., REZAI J.. EFFECT OF WEATHER CONDITIONS ON COTTON FLOWER AND BOIL RETENTION IN GORGAN. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES[Internet]. 2004;10(4):75-84. Available from: https://sid.ir/paper/9525/en

IEEE: Copy

F. AKRAM GHADERI, A.A.F. SOLTANI, and J. REZAI, “EFFECT OF WEATHER CONDITIONS ON COTTON FLOWER AND BOIL RETENTION IN GORGAN,” JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, vol. 10, no. 4, pp. 75–84, 2004, [Online]. Available: https://sid.ir/paper/9525/en

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