Ferat UZUN, Ali Vaiz GARİPOĞLU, Nuh OCAK

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

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

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

To investigate the changes in irrigation water use efficiency (IWUE) and some agronomic and nutritional characteristics of forage maize and sorghum cultivars (cvs) irrigated in a shallow soil, two maize and seven sorghum cvs were evaluated in rain-fed (NIR) and irrigated (IR) field conditions for a 3-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 relative feed values. There was an advantage for sorghum cvs over maize cvs regarding to agronomic and nutritional traits in a shallow soil, irrespective of irrigation. The IR-cvs had higher yield and nutritional quality compared to the NIR-cvs. The IWUE values of Jumbo, Grazer, Hayday, El Rey and Gozde cvs were 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 and Early sumac. When cvs classes were compared for the yields of DM, DDM and CP, the classes ranked in the following order: Rx-893 = Karadeniz Yildizi = Rox = Early Sumac ≤ Gözde = Grazer = Hayday = Jumbo = El Rey.

Keywords:

Chemical composition Feed value, Forage, Plant morphology,

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