, Volume 31, Issue 1, pp 48-56

Effects of silica and nitrogen supply on some leaf characters of the rice plant

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While the degree of leaf erectness of the rice plant is a varietal characteristic, it can be changed greatly by silica and nitrogen nutrition. Nitrogen tends to make rice leaves more droopy and silica keeps them more erect. This effect of silica on leaf erectness is marked when the silica content of leaves is low. Leaf openness is well correlated with the light extinction coefficient of rice populations.

Leaf thickness increases with increasing supply of silica whereas it decreases with increasing supply of nitrogen. Increased nitrogen supply markedly increases leaf length, width, and area. Silica has little effect on these characters.