超多收性 대립벼의 窒素施肥量이 生育特性과 收量에 미치는 影響 = Effects of Nitrogen Level on Growth and Yield of High Yielding Ability and Super Large-Grain Rice

국문 초록 (Abstract)

本 硏究는 晋州産業大學校 學生實習圃場에서 1996年 4月부터 同年 10月까지 다산벼(da san)벼를 公試 品種으로 하여 施肥水準을 窒素 0, 10, 15, 20, 25kg으로 달리 栽培하여 各 施肥水準에 따라 生育 및 收量, 米質을 調査한바 그 結果를 要約하면 다음과 같다.
1. 分蘗數는 施肥水準이 높을수록 많았으며, 有效莖比率은 낮은 경향이었다
2. 稈長 및 穗長은 施肥水準이 높을수록 길었으며,穗數는 큰 차이가 없었다.
3. 千粒重은 施肥水準이 높을수록 무거웠으며, 登熟 및 精玄比率은 낮은 경향이었다.
4. 粒數는 施肥水準 無肥區보다 25kg區에서 30個 程度 많았다.
5. 比重 및 層米重은 施肥水準이 높을수록 많은 경향이었다.
6. 正組重은 無肥歐에 비하여 25kg歐에서 278kg, 玄米重은 190kg程度 많았다.
7. 各 形質의 有意性 檢定 結果는 反復間에는 差異가 없었으며 處理間에는 全 形質에서 認定되었다.
8. T-N含量은 施肥量이 增加함에 따라 增加하였다.
9. P_2O_5, CaO, MgO는 處理間에 差異가 없었다.
10. K_2O는 10kg區, SiO_2는 25kg區에서 가장 높았다.

다국어 초록 (Multilingual Abstract)

This Paper aims to examine the effects of different level nitrogen fertilization on the growth, yield and quality of the dasam rice. The nitrogen levels were 0, 10, 15, 20 and 25kg per plot.
The experiment were carried out in Chinju National University Experimental Farm from April till October, 1996. The results are as follows :
1. The tiller numbers became larger in the higher notrogen level plots. But as the nitrogen level got higher, the percentage of effective tillers decreased.
2. The culm and panicle legth became longer in the higher level ; the number of panicles per plant showed little difference.
3. The 1,000 grain weight became heavier in the higher level ; but the ripeness percentage and the hulled and unhulled rice percentage became lower.
4. The grain number of the 25kg plot was larger by 30 than that of the 0kg plot.
5. The empty grains and rice screenings increased in the higher levels.
6. The winnowed rice in the 25kg plot was heavier by 278kg than in the 0kg plot ; the brown rice was heavier by 190kg.
7. The significance test revealed the each replication showed no difference in each character, but that each treatment showed significant difference in all the characters.
8. The T-N content increased in the higher levels.
9. P_2O_5, CaO and MgO showed no difference in each treatment.
10. K_2O content was highest in the 10kg level ; SiO_2 in the 25kg level.