水稲の根系発達におよぼすアンモニア態窒素と硝酸態窒素の影響

日本作物学会紀事

廣瀬 大介¹  野間 貴文² 

[1] 南九州大学環境造園学部;鹿児島大学大学院連合農学研究科

关键词: Ammonium nitrogen;    アンモニア態窒素;    Nitrate nitrogen;    硝酸態窒素;    Nitrogen fertilizer;    窒素肥料;    Rice plant;    水稲;    Root activity;    根の活性;    Root system;    根系;   

DOI  :  10.1626/jcs.74.270

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The root-system development of two rice varieties, Koshihikari and Kichinkurogome, fertilized with ammonium nitrogen was compared with that of these varieties fertilized with nitrate nitrogen. In both varieties, dry weight, root length and the number of nodal roots were significantly greater in the plants fertilized with ammonium nitrogen than in those fertilized with nitrate nitrogen. However, specific root length was significantly longer in the plants fertilized with nitrate nitrogen in both varieties. The above effects of the chemical form of fertilizer nitrogen on the root system were greater in Kichinkurogome than in Koshihikari. These findings suggest that the growth of rice fertilized with ammonium nitrogen is superior to that fertilized with nitrate nitrogen in increasing root-system length. The difference in the root-system length may depend on the difference in the number of nodal roots rather than the degree of root branching. The effect of the chemical form of fertilizer nitrogen on root system development was suggested to vary with the rice cultivar.

【 授权许可】

Unknown