Nuh OCAK, Ali Vaiz GARİPOĞLU, Ferat UZUN

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

Sığ toprakta, sulanan yemlik mısır ve sorgum çeşitlerinin sulama suyu kullanım etkinliği (SSKE) vebazı tarımsal ve besin değeri özellikleri için; iki mısır ve yedi sorgum çeşidi, doğal yağış alan (YA) vedoğal yağış artı sulama yapılan (SU) tarla koşullarında 3 yıllık bir sürede değerlendirilmiştir. Deneme,tesadüf bloklarında bölünen bölünmüş parseller deneme desenine göre yürütülmüştür Sulama, yembitkilerinin bitki yüksekliğini artırırken, metabolik enerji ve nispi yem değerlerini düşürmüştür.Sulamadan bağımsız olarak, sığ toprakta agronomik ve besleme özellikleri bakımından sorgum çeşitlerimısır çeşitlerinden daha avantajlı bulunmuştur. Sulanan yemlik çeşitler, sulanmayan çeşitlere göre dahayüksek verim ve besleme kalitesine sahip olmuşlardır. Jumbo, Grazer, Hayday, El Rey ve Gözdeçeşitlerinin SSKE değerleri diğer sorgum çeşitlerinden daha yüksek bulunmuştur. El Rey (en yüksek)ve Rox (en düşük) hariç, diğer tüm çeşitlerin SSKE değerleri benzer bulunmuştur. Rox ve Early Sumakhariç, sorgum çeşitlerinin bitki yükseklikleri ve kuru madde (KM), sindirilebilir KM (SKM) ve hamprotein (HP) verimleri, mısır çeşitlerinden daha yüksek olmuştur. KM, SKM ve HP bakımından çeşitlerkarşılaştırıldığında sıralama şu şekilde olmuştur: Rx-893 = Karadeniz Yildizi = Rox = Early Sumak

Sığ toprakta sulamadan etkilenen mısır ve sorgum çeşitlerinin su kullanım etkinliği, verimi ve besin değeri

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

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