uzun, ferat ondokuz mayıs üniversitesi - ziraat fakültesi - tarla bitkileri bölümü, Turkey , garipoğlu, ali vaiz ondokuz mayıs üniversitesi - ziraat fakültesi - zootekni bölümü, turkey , ocak, nuh ondokuz mayıs üniversitesi - ziraat fakültesi - zootekni bölümü, Turkey

Water use efficiency, yield, and nutritive value of maize and sorghum cultivars irrigated in a shallow soil

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To investigate the changes in irrigation water use efficiency (IWUE) and some agronomic andnutritional characteristics of forage maize and sorghum cultivars (cvs) irrigated in a shallow soil, twomaize and seven sorghum cvs were evaluated in rain-fed (NIR) and irrigated (IR) field conditions for a3-year period. The experimental design was a randomized complete block in a split-plot arrangement.The irrigation increased plant height of forages whereas decreased metabolizable energy and relativefeed values. There was an advantage for sorghum cvs over maize cvs regarding to agronomic andnutritional traits in a shallow soil, irrespective of irrigation. The IR-cvs had higher yield and nutritionalquality compared to the NIR-cvs. The IWUE values of Jumbo, Grazer, Hayday, El Rey and Gozde cvswere higher than those of other sorghum cvs. The studied cvs, except for El Rey (the highest) and Rox(the lowest) had similar IWUE values. The plant heights and dry matter (DM), digestible DM (DDM)and crude protein (CP) yields of sorghum cvs were greater than those of maize cvs, except for Rox andEarly sumac. When cvs classes were compared for the yields of DM, DDM and CP, the classes rankedin the following order Rx-893 = Karadeniz Yildizi = Rox = Early Sumac ≤Gözde = Grazer = Hayday = Jumbo = El Rey.

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Chemical composition. Feed value. Forage. Plant morphology. Water stress

Anadolu Journal Of Agricultural Sciences

366