GROWTH, YIELD AND WATER USE EFFICIENCY OF ALFALFA UNDER DIFFERENT METHODS OF IRRIGATION TIMING

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NEYSHABOURI M.R.; SADEGHI S.

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Journal: JOURNAL OF AGRICULTURAL KNOWLEDGE Year:2003 | Volume:13 | Issue:2 Page(s): 77-88

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Title

GROWTH, YIELD AND WATER USE EFFICIENCY OF ALFALFA UNDER DIFFERENT METHODS OF IRRIGATION TIMING

Author(s)

NEYSHABOURI M.R. | SADEGHI S. | Issue Writer Certificate

Keywords

CANOPYTEMPERATUREQ2

EVAPOTRANSPIRATIONQ4

IRRIGATION TIMINGQ2

MEDICAGO SATIVE L.Q2

WATER USE EFFICIENCYQ3

Abstract

The present research was carried on to investigate the effects of five various methods of IRRIGATION TIMING on alfalfa (Medicago sativa L.) hay production at farm research station of Univ. of Tabriz in Karkadj. IRRIGATION TIMING methods as irrigation treatments were: irrigation at 50% available soil water depletion in root zone (T1), irrigation at 50 kPa soil suction in 30 to 35cm depth (T2), irrigation at 1500 kPa midday leaf water potential (T3), irrigation when foliage and air temperature difference approached to a particular predicted value (T4), and irrigation when cumulative daily crop EVAPOTRANSPIRATION, as predicted from a class A pan evaporation, approached to 50% and 70% of root zone soil available water (T5 and T6).The difference in hay production (wet and dry matter) was statistically significant at 1% level among the treatments. T1 treatment produced maximum yield of 3.90 and 4.20 tons.ha-1 in the second and third cuttings, respectively.T6 had lowest yield of 3.11 and 3.55 tons.ha-1 respectively. Apparently delaying irrigation up to 70% soil water depletion resulted in water deficit and lower yield. Water consumption reached to its maximum level also in T1 treatment, 3645.5 m3/ha for the second and 4638.7 m3.ha-1 for the third cuttings; the corresponding figures were 2209.2 and 3468 m3.ha-1, respectively for T6. The difference between treatments for WATER USE EFFICIENCY (dry matter produced per m3 of irrigation water) was statistically significant at 5% level of probability only for the second cutting. Maximum and minimum values were 1.5 and 1.1 kg.m3 in T6 and both T1 and T3 treatments respectively. Considering only yield production, irrigation at 50% soil water depletion (T6) may be regarded as the best one among the other treatments. From water consumption and WATER USE EFFICIENCY aspects T6 treatment would be preferred.

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APA: Copy

NEYSHABOURI, M.R., & SADEGHI, S.. (2003). GROWTH, YIELD AND WATER USE EFFICIENCY OF ALFALFA UNDER DIFFERENT METHODS OF IRRIGATION TIMING. JOURNAL OF AGRICULTURAL KNOWLEDGE, 13(2), 77-88. SID. https://sid.ir/paper/28982/en

Vancouver: Copy

NEYSHABOURI M.R., SADEGHI S.. GROWTH, YIELD AND WATER USE EFFICIENCY OF ALFALFA UNDER DIFFERENT METHODS OF IRRIGATION TIMING. JOURNAL OF AGRICULTURAL KNOWLEDGE[Internet]. 2003;13(2):77-88. Available from: https://sid.ir/paper/28982/en

IEEE: Copy

M.R. NEYSHABOURI, and S. SADEGHI, “GROWTH, YIELD AND WATER USE EFFICIENCY OF ALFALFA UNDER DIFFERENT METHODS OF IRRIGATION TIMING,” JOURNAL OF AGRICULTURAL KNOWLEDGE, vol. 13, no. 2, pp. 77–88, 2003, [Online]. Available: https://sid.ir/paper/28982/en

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