초록
고온기(高溫期)에 물관리(管理)를 방법(方法)의 효과(效果)를 알고져 시험(試驗)을 실시(實施)하였던바 그 결과(結果)는 다음과 같다. 1. 물의 항시유괘관수(恒時流掛灌水) 함으로서 $1.5^{\circ}C$의 수온(水溫)을 저하(低下)시켰다. 2. 물을 항시유괘관수(恒時流掛灌水) 함으로서 뿌리의 양(量)을 많게 하였을뿐 아니라 지표부위(地表部位)에 뿌리의 분포(分布)를 많게 하여 지표(地表) 5cm하내(下內)의 뿌리의 분포량(分布量)이 항시담수구(恒時湛水區)에서는 40%에 비(比)하여 항시유괘관수구(恒時流掛灌水區)에서는 60%에 달(達)하였다. 3. 유괘관수구(流掛灌水區)에서 지엽장(止葉長) 및 지엽면적(止葉面積)이 증가(增加)되었다. 4. 유괘관수구(流掛灌水區)에서 성숙기(成熟期)의 엽량내(葉良內)에 전질소(全窒素) 및 규산(珪酸)의 함량(含量)이 많았다. 5. 항시유괘관수구(恒時流掛灌水區)에서 수수(穗數) 및 1수영화수(穗穎花數)를 증가(增加)시켜 수량증가(收量增加)를 가져왔다.
This study was carried out to determine the effect of water control on Rice plan in warmer season(July~August). The results are summarized as follows; 1. Compared to ordinary watering methods, a constant irrigation method indicated a decrease in water temperature of $1.5^{\circ}C$. 2. In the plot of constant irrigation, there was an increase in the root system in general and an increase of root distribution near the surface in particular. The near surface root distribution under ordinary watering method shows about forty percent distribution. The constant irrigation method shows a near-surface root distribution of sixty-percent within a perimeter of five centimeters. 3. Under the contants irrigation method, there was an increase in length and area of the flag leaf. 4. The total nitrogen and silica content of leaf-bodies at maturing stage was greater when using the constant irrigation method. 5. There was an increase in the number of panicles and the number of spikelets when using the constant irrigation method. 6. The yield was remarkably increased with constant irrigation.