Abstract
Haganemugi and Sekitorisai-No. 1, 6-rowed barley varieties, were used and the effects of leaf sheath and turgor pressure on culm strength were studied. Generally, the leaf sheath efficiency for culm strength was about 10 to 70 %, and it was higher in the upper internodes than in the basal. On the other hand, the leaf sheath efficiency for culm strength of Haganemugi (stiff culm variety) was lower than that of Sekitorisai-No. 1 (brittle culm variety). The turgor pressure efficiency for culm strength was about 10 to 40 %, and it gradually decreased with the growth of culms. The efficiency value in Sekitorisai-No. 1 was higher than in Haganemugi.
