Environmental Adaptation of Tall Fescue Varieties in Mountainous Pastures IV. Evaluation of winter hardiness by DW / RTAR

Tall Fescue 품종의 환경적응성 IV. 상대경수 출현율당 개체중에 의한 월동성의 평가

This experiments was carried out to evaluate the potential winter hardiness of tall fescue varieties based on the data of dry weight of plant per relative tiller appearance rates(DW/RTAR) in mountainous pastures of Taekwalyon area. The results obtained were as follows; 1. The varieties were classified into 2 groups by dry weight of plant per relative tiller appearance rates (DW/RTAR). Thus. Forager and Fuego belong to the group with more than 2.0 in DW/RTAR but Barcel, Barvetia, Demeter, Enforcer. Johnstone, Safe and Stef belong to the group with less than 2.0 in DW/RTAR respectively. 2. The dry weight of plant per relative tiller appearance rates(DM/RTAR) and dry weight of plant(DW) of 1st cutting were significantly positive correlated with number of heading tillers and dry weight of heading tillers. 3. The dry weight of plant per relative tiller appearance rates(DW/RTAR) was significantly positive correlated with dry weight of plant(DW) of final cutting and of 1st cutting. 4. The varieties with high DW/RTAR showed a high dry weight of plant(DW) of 1st cutting. Accordingly, it was concluded that DW/RTAR is a valuable character for evaluating potential winter hardiness of tall fescue on mountainous pastures of Taekwalyon area.

대관령지역의 영년초지에서 재배되는 Tall fescue 품종의 월동성을 상대경수출현율당 개체중으로 평가하였다. 1 상대경수출현율당 개체중에 의하여 Tall fescue 품종을 2품종군으로 분류하였다. 즉 상대경수출현율당 개체중이 2.0이상에는 Forager와 Fuego의 2품종이, 그리고 2.0 미만에는 Barcel, Barvetia, Demeter. Enforcer, Johnstone, Safe 그리고 Stef의 7품종이 포함되었다. 2. 상대경수출현율당 개체중과 1번초의 개체중은 출수관련 형질들과 유의한 정상관이 인정되었다. 3. 상대경수출현율당 개체중은 가을철 최종예취시기의 개체중과 1번초의 개체중과 유의한 정상관이 인정되었다. 4. 상대경수출현율당 개체중이 많은 품종에서 1번초의 개체중이 많았다. 따라서 상대경수출현율당 개체중은 대관령지역에서 Tall fescue 품종의 월동성을 평가하는 유효한 형질이라고 생각되었다.