flag leaf sheath length

例句：

1. 1. The flag leaf sheath length is an important factor in determining the growth rate of the plant.
   旗叶鞘长度是决定植物生长速率的一个重要因素。
2. 2. The measurement of flag leaf sheath length can provide valuable information for the study of plant growth and development.
   测量旗叶鞘长度可以为植物生长和发育的研究提供有价值的信息。
3. 3. In order to improve the growth rate of crops, researchers are trying to determine the optimal flag leaf sheath length.
   为了提高作物的生长速率，研究人员正试图确定最佳的旗叶鞘长度。