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EFFECT OF MOISTURE DEPLETION RATES AND IRRIGATED ZONE DEPTH ON YIELD , WATER CONSUMPTIVE AND WATER USE EFFICIENCY OF Sorghum bicolor L.
تأثير الأستنزاف الرطوبي وعمق المنطقة المروية في الحاصل والاستهلاك المائي وآفاءة استعمال . Sorghum bicolor L. Moench الماء لنبات الذرة البيضاء

Authors: Bassim Hussein Farhan باسم حسين فرحان --- Abdul -Amir Th . Salih عبد الأمير ثجيل صالح
Journal: Diyala Journal of Agricultural Sciences مجلة ديالى للعلوم الزراعية ISSN: 20739524 Year: 2015 Volume: 7 Issue: 1 Pages: 255-266
Publisher: Diyala University جامعة ديالى

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Abstract

Implemented field experiment to grow the crop sorghum (Sorghum bicolor L.Moench) class Ingath of the autumn season 2012 in the fields of the GeneralCompany for Horticulture and Forestry- Zaafaraniya / Ministry of Agriculture ,south of Baghdad. In the soil of silty clay according to design were arranged in asplit-plot design with three replications, which included major treatmentproportions of moisture depletion as added irrigation water after depleting 50%,70%, 90% of available water to plant, and included secondary plots the depth ofthe irrigated zone is D1 (0-30 cm) from the beginning of planting to the harvestand the second depth D2 (0-10 cm) from agriculture to the beginning of thevegetative growth stage, then increase depth of irrigated zone (0-20 cm) to thebeginning of flowering, and (0-30 cm) to the end of physiological maturity. Thisexperiment is designed to study the effect of the proportions of moisturedepletion and the depth of irrigated zone on the plant growth of sorghum andestimate the water consumption of the crop under conditions of Iraq center .Calculated the amount of water added for each irrigate for compensate depletionmoisture during the growing season, depending on measurements of the watercontent weighted method . Estimate the actual water consumption by measuringthe water content of the soil after irrigation and before next irrigate on the lengthof the growing season. Calculate reference evapotranspiration By the Penman-Monteith modified equation . Calculate the crop coefficient (Kc) , the yieldresponse factor (Ky) and field water use efficiency (WUEf) and crop water useefficiency (WUEc) . Has been studying factor of yield of the main results can besummarized that have been obtained, including the following: The highest grainsyield (6428) kg.h-1 from at treatment of T1D1, and reached less yield grains(3622) kg.h-1 at treatment of T3D2. The treatment T1D1gave highest bio-yieldreached 25.187 ton.h-1and the T3D2 treatment gave the less bio-yield 11.578ton.h-1 . Moisture depletion treatments , depth of the irrigated zone and theinteraction between them didn't have a significant impact on (WUEc , WUEf) ,treatment T2D2gave the highest value of WUEc , WUEf reached to (1.06, 1.09)kg of grain.m-3 respectively, while the treatment T3D2given lower value toWUEc , WUEf reached to (0.88, 0.92) kg of grain.m-3, respectively . treatment T3 gave the highest value of yield response factor Ky reached (1.05 to 1.21) forD1 and D2, respectively. This means that these two treatments were moresensitive to the deficit of irrigation from the rest of the other treatments that Kyvalues have ranged between (0.63 to 0.87).

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