Effect of Nitrogen Composition in Culture Solution on the Growth of Rice Seedlings Raised on a Cotton Mat Spread on Hydroponic Apparatus for Vegetables(Agronomy)

Japanese Journal of Crop Science

Mizue KAWASHIMA¹  Chie MORIMOTO¹  Hiroshi EHARA¹  Osamu MORITA¹  Masaru SUEMATSU¹ 

关键词: Ammonium nitrogen;    アンモニア態窒素;    Cotton mat;    イネ;    Hydroponics;    硝酸態窒素;    Nitrate nitrogen;    水耕栽培;    Nitrogen form;    草姿;    Plant form;    窒素形態;    Rice;    マット育苗;   

DOI  :  10.1626/jcs.70.359

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Effect of the form and composition of nitrogen in a culture solution on the growth of rice seedlings raised on a cotton mat spread on a hydroponic apparatus for vegetables was investigated. The nitrogen composition, NH4-N:NO3-N, in the Kimura B solution was modified as follows:28%:72% (plot 1), 44%:56% (plot 2), 72%:28% (plot 3), 100%:0% (plot 4). Plant length, root length and root dry weight were greatest in plot 1 followed by plot 2, 3 and 4. In plots 1 and 2, the plant length was same level as that in seedlings raised in a box. However, the seedlings in plots 1 and 2 had longer roots than those raised in a box, and were suspected to be injured by transplanting. Thus, nutrient application was modified to change the plant form as follows:the culture solution was not applied during the first seedling-raising period, NO3-N-rich culture solution (NH4-N:NO3-N=28%:72%) was applied during the second period, and culture solution containing only NH4-N as the nitrogen source was applied during the last period. The seedlings raised by this method had nearly the same plant length and root length as those raised in boxes. Moreover, there was no distinctive difference in growth characteristics after transplanting between the seedlings raised by this method including different nitrogen compositions and raised in box.

【 授权许可】

Unknown