규산과 질소형태별 처리에 따른 벼의 수분 및 질소흡수와 이용효율 비교

Comparison of Water, Nitrogen Uptake and Use Efficiency Treated with Silica and N Application Forms

This experiment was carried out to elucidate the effects of silicate and different application forms of N on the uptake of water and N by rice plants. Three rice cultivars, Ilpum, Anda and M202, were grown under the hydroponics in a phytotron. One-hundred ppm silica was applied for silicate treatment. For nitrogen application forms were 100% NH4 and NH4+NO3 in 2:1 ratio were applied. Silica treatment, compared to silica free, was very effective on the nitrogen uptake and dry weight increase of rice plants. Although silica application demonstrated no significant effect on the amount of water uptake, it improved increased water and nitrogen use efficiency. Therefore, sufficient application of silicate in paddy field will be useful for the growth of rice plants and water saving.