Özet:

ÖZET Mevsim boyunca otlatmamn sun'i mer'a kanşımındaki baklagil bitkilerinin köklerinde depo edilen yedek besin maddelerini ne şekilde etkilediğini saptamak üzere girişilen bu denemede Kayseri yoncası ve yerli korunga bitkilerinin köklerinden 4 tekrarlamalı olarak alınan iimekler, O.2N H ıOS 4 ile hidrolize, Heinze ve Murneek'in tarif ettiği Shaffer Somogyi metoduyla glikoza diinüştürülerek miktarları titrasyonla bttlunmuştur. Otlatılan ve otlatılmayan sU/ı' i meralardaki yonca ve korunga bitkilerinin yedek besin maddeleri bakımından karşılaştırmaları yapıldığında; yoncanın genellikle korungadan daha fazla elverişli karbonhidrat ihtiva ettiği, gerek otlafılan ve gerekse otlatılm/yanda mevsim boyunca çok önemlifarklılıklarmeydana getirmesine karşılık; korunga bitkilerinin ihtiva ettiği elverişli karbohnidrat seviyesinin yoncadan düşük olduğu ve elverişli karobonhidrat trendinin büyük ölçüde değişiklikler göstermediği ve netice olarak kapasite dahilinde otlatmanın yonca ve korunga bitkilerine mevsim sonu hariç menfi etki etmediği sonucuna vanlmıştır. SUMMARY THE EFFECT OF GRAZING ON THE TOTAL AVAIBLE CARBOHYDRATE IN THE ALFALFA AND SAINFOIN ROOTS. This experiment was conducted at Atatürk University farm in Erzurum. Kayseri Alfalfa and Commen sainfoin which were grown in the alfal fa x grasss and sainfoin x grass pastures used by Randomized block design with four replication. Plant sampling for carbohydrate analyses began on May 25, ı 970, shortly before the animals put the pasture and was repeated at 15 days intervats during the grazing season. Twenty to 30 plants of each legume were dug from each treatment on each sampling date. The top growth was remowed at the junction of root and stern, and the roots clipped to 15 cm. in length. The roots were washed, dried at ıoOoc for one hour and drying was completed at 700C. Total avaib1e carbohyodrates in the root tissue were extracted from duplicate 1/2 gram samples using 0.2 N H2S04. An aliquat was analysed for g1ucose by the Shaffer-Somogyi method described by Heinze and M urneek and the result experessed as percent total avaible earbahydrates on a dry weight basis (700C). During the growing season, it may be concluded that the change of İbrahim MANGA total avaible carbohydrate Ievels of alfalfa roots which were grown under grazed and ungrazed pastures were not related to grazing but they were effected by climatic contitions and physiologcal reations of plants. The total avaible carbohydrate levels of sainfoin roots were Iower at grazed pasture than ungrazed. Except two samples which were taken on 31. 7.970 and 1.9.970, there were no statistical differences between sainfoins grown under grazed and ungrazed pastures, during the growing season. Co.mparing the total avaible carbohydrate levels in sainfoin and alfalfa roots which were grown at grazed and ungrazedpasture, in general, alfalfa level is higher than sainfoin and also there was a significant ~hange during the grazing season. İn enontrast this, the total amount of ava.ib1e earbohydrate is lower than alfalfa and there were not significant differences between grazed and ungrazed conditions during the grazing season. The results showed that grazing at the carrying capacity levels of pastures were not affected on sainfoin and alfalfa plants.

Anahtar Kelimeler: