ESTIMATION OF CROP COEFFICIENTS (KC ) OF GRAIN CORN S.C. 704 USING THE PHYSIOLOGICAL PROPERTIES (CASE STUDY: KERMANSHAH- MAHIDSHT)

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BAFKAR A.; FARHADI B.; KARIMI A.R.

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Paper Information

Journal: Journal of Water and Soil Year:2013 | Volume:27 | Issue:4 Page(s): 832-838

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Title

ESTIMATION OF CROP COEFFICIENTS (KC ) OF GRAIN CORN S.C. 704 USING THE PHYSIOLOGICAL PROPERTIES (CASE STUDY: KERMANSHAH- MAHIDSHT)

Author(s)

BAFKAR A. | FARHADI B. | KARIMI A.R. | Issue Writer Certificate

Keywords

LEAF AREA INDEX (LAI)Q2

DAYS AFTER SOWING (DAS)Q2

LYSIMETERQ2

EVAPOTRANSPIRATIONQ2

Abstract

Crop coefficient (Kc) is one of the important factors in the irrigation planning and crop water allocation. The current study was carried out in order to calculate Kc for grain maize in the lysimetric station of Jihad-e-Agriculture and Natural Resource of Kermanshah, in Mahidasht. Kc was calculated as the ratio of crop EVAPOTRANSPIRATION (ETc) to potential reference crop EVAPOTRANSPIRATION (ETo). Actual crop EVAPOTRANSPIRATION was measured based on lysimetric experiment and potential of reference crop EVAPOTRANSPIRATION was calculated using Penman-Monteith equation based on daily weather data in Mahidasht weather station. During the growing season Leaf Area Index (LAI) was measured 14 times. The relation between Kc and number of Days After Sowing (DAS) and also LAI was investigated. In both cases the relation was made in a polynomial equation in order of 5 with the coefficient of determination over 0.9 and confidence level 0.001. Total amount of ETo and ETc in the growing period were 913 and 743 mm respectively. The initial, mid and late Kc for the maize determined a 0.5, 1.22 and 0.89, respectively. Comparing the calculated Kc values in the current study with the FAO values for Kc shows acceptable match except small differences in the late season that can be because of climate change and its impacts on crop water requirement.

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References

COMPARISON OF MSM MODEL FOR PREDICTION OF POTENTIAL EVAPOTRANSPIRATION OF MAIZE WITH FAO METHODS

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APA: Copy

BAFKAR, A., FARHADI, B., & KARIMI, A.R.. (2013). ESTIMATION OF CROP COEFFICIENTS (KC ) OF GRAIN CORN S.C. 704 USING THE PHYSIOLOGICAL PROPERTIES (CASE STUDY: KERMANSHAH- MAHIDSHT). JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), 27(4), 832-838. SID. https://sid.ir/paper/141742/en

Vancouver: Copy

BAFKAR A., FARHADI B., KARIMI A.R.. ESTIMATION OF CROP COEFFICIENTS (KC ) OF GRAIN CORN S.C. 704 USING THE PHYSIOLOGICAL PROPERTIES (CASE STUDY: KERMANSHAH- MAHIDSHT). JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)[Internet]. 2013;27(4):832-838. Available from: https://sid.ir/paper/141742/en

IEEE: Copy

A. BAFKAR, B. FARHADI, and A.R. KARIMI, “ESTIMATION OF CROP COEFFICIENTS (KC ) OF GRAIN CORN S.C. 704 USING THE PHYSIOLOGICAL PROPERTIES (CASE STUDY: KERMANSHAH- MAHIDSHT),” JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), vol. 27, no. 4, pp. 832–838, 2013, [Online]. Available: https://sid.ir/paper/141742/en

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