Erzurum ekolojik şartlarında yetiştirilen kılçıksız brom (Bromus inermis Leyss.)' un ot ve tohum veriminde ekonomik sulama seviyesi ve azot dozunun belirlenmesi
Erzurum ekolojik koşullarında kılçıksız bromda ekonomik kuru ot üreticiliği için bitkiler sonbaharda verilecek 4 kg N/da'a ilaveten erken ilkbaharda l O kg/da oranında azotla gübrelenmeli, topraktaki Faydalı su % 25 seviyesine düştüğünde tarla kapasitesine gelinceye kadar sulanm.alı ve ilk biçim çiçeklenme başlangıcında yapılmalıdır. İkinci büyüme için sulama, gübreleme ve biçim yapılmasına gerek yoktur. İkinci büyüme eylülün son haftaları içerisinde hafifçe otlatılmalıdır. Tohum üretiminde ise bitkilere sonbaharda 8 kg N/da ve erken ilkbaharda 6 kg/da azot verilmeli ve tarla kapasitesi % 25'e düştüğünde sulanmalıdır.
Determination of economical irrigation level and nitrogen rates in forage and seed yield of smooth bromegrass (Bromus inermis Leyss.) grown in the Erzurum ecological condition
Smooth bromegrass was irrigated with 3 levels (irrigation up to field capacity when 75, 50 or 25 % of the useful soil water content were consumed), fertilized with 5 nitrogen rates (0+0, 5+3, 10+4. 15+6 and 20+8 kg/da at early spring + after first cutting immediately andO, 3, 6, 9 and 12 kg/da at the early spring for seed production) and harvested for hay at beginning of heading or flowering; Regarding the economic aspects of nitrogen and irrigation, it may be proposed that smooth bromegrass must be fertilized with 10 kg N/da in the early spring in addition to the application of 4 kg N/da in autumn and irrigated with S3 level (7-8 days of interval) (irrigation up to field capacity when 75 % of the useful soil water content were consumed) and harvested at the beginning of flowering for hay production. The irrigation and fertilization with nitrogen of smooth bromegrass for the second growth are not necessary and also uneconomical. However, the second growth may be slightly grazed in the second part of September in Erzurum and the locations with similar ecological conditions. In seed production, the stand of smooth bromegrass must be fertilized with 6 kg N/da in early spring in addition to the application of 8 kg N/da in autumn and irrigated with S3 level.