Araşt ı rma Ankara Üniversitesi Ziraat Fakültesi Tarla Bitkileri Bölümü deneme tarlalar ı nda yap ı lm ışt ı r. Ara şt ı rmada yer alan dört bu ğday çeş idi [ı ki makarnal ı k Çakmak-79, Kunduru-1149 ve iki ekmeklik Gerek-79, Gün-91 ] azot al ı m ı ve azot hasat indeksi yönünden iki y ı l süreyle 1995-1997 incelenmi ştir. Elde edilen sonuçlara göre; bu ğday çeş itleri aras ı nda toprak üstü organlardaki toplam azot miktar ı , tanede biriktirilen azot miktar ı ve azot hasat indeksi tanedeki azot miktar ı n ı n toplam toprak üstü organlar ı n azot miktar ı ndaki pay ı bak ı m ı ndan ikinci y ı lda önemli farkl ı l ı k bulunmu ştur. Tane d ışı ndaki başak organlar ı , yapraklar ve saptaki azot miktar ı ve azot içeriğ i bak ı m ı ndan da çeş itler aras ı nda önemli farklar ortaya ç ı km ışt ı r. Denemenin ilk y ı l ı nda, bu ğday çeşitlerinin azot içeri ğ i; tanede % 2.04-2.38, tane d ışı ndaki baş ak organlar ı nda % 0.34-0.53, yapraklarda % 0.76-1.01 ve sapta yaprak k ı nları dahil °/0 0.30-0.47 aras ı nda iken; ikinci y ı lda s ı ras ı yla % 2.29-2.61, % 0.63-0.75, % 0.66-0.84 ve % 0.45-0.68 olmu ştur.
This research was carried out in the experimental field of The Field Crops Department, Faculty of Agriculture,Ankara University. Four wheat cultivars [two durum wheat Çakmak-79, Kunduru-1149 , and two bread wheat Gerek-79, Gün-91 ] were studied for nitrogen uptake and nitrogen harvest index in two years 1995-1997 . According to results obtained, significant differences among the wheat cultivars in total nitrogen, nitrogen content in grains and nitrogen harvest index occurred in the second year. Significant differences among the wheat cultivars in nitrogen contents and concentrations were also found in chaff rachis plus glumes and awns , leaves and the culm. Nitrogen concentrations in wheat cultivars in the first year were obtained 2.04-2.38 ' /0 in grains 0.34-0.53 % in chaff, 0.76-1.01 % in leaves, and 0.30-0.47 % in the culm; while nitrogen concentrations in the second year were found as 2.29-2.61 %, 0.63-0.75 %, 0.66- 0.84 %, and 0.45-0.68 % in grains, chaff, leaves, and the culm respectively.
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