サトウキビ初期生育における根の種類・量と生育量に関する研究

日本作物学会紀事

上野 正実¹  川満 芳信¹  小宮 康明¹  福澤 康典¹ 

[1] 琉球大学農学部

关键词: Primary root;    一次根;    Shoot root;    茎根;    Root weight density;    根重密度;    Sugarcane;    サトウキビ;    Net assimilation rate;    純同化率;    Initial growth;    初期生育;    Relative growth rate;    相対成長率;    Root depth index;    根の深さ指数;   

DOI  :  10.1626/jcs.78.356

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Sugarcane (Saccharum spp.) is often damaged by a meteorological disaster in the initial growth stage; consequently its yield is decreased. To solve this problem, we performed studies to develop a deeper root system as rapidly as possible. In the present study, 6 varieties of sugarcane were grown in a 1m-deep pots for 40 days to examine the relationship between the development of root system and initial growth rate. The primary root number, and root weight density, and root depth index (RDI) were measured, and growth analysis was conducted. In 0-30cm soil depth, shoot root number was significantly correlated with root weight density, but not in a deeper layer of the soil. The ratio of shoot root number to total root number did not significantly correlate with RDI, but with the relative growth rate (RGR). The results show that the development of shoot roots increases the root-weight density, and the ratio of shoot root number to total root number, resulting in the increase in RGR in the initial growth stage.

【 授权许可】

Unknown