苗期调亏处理对玉米根系生长影响的试验研究

Effects of Regulated Deficit Irrigation on Root Growth in Maize

以玉米为试验材料 ,利用盆栽试验研究了调亏灌溉对苗期根系形态、活力和干物质累积的影响。试验结果表明 :调亏灌溉减少根系干物质累积 ,根冠比、平均根长和根系活力 ( TTC还原量 )提高 ;单株根系条数下降 ;根系活力在复水后仍保持较高水平。表明调亏在量上抑制根系生长 ,但在形态和吸收功能上表现出一定的补偿效应。

Effects of regulated deficit irrigation (RDI) on conformation, activity and dry matter accumulation of maize root were investigated with pot cultivation. Results indicated that RDI may reduce dry matter accumulation to a extent, relevant to seriousness, lasting time of RDI and crop growing stage when RDI treat was carried out. Ratio of root/shoot, TTC contain in root increased, while number and total length of root per seedling decreased. Root activity was improved after re watering, which suggests that RDI might restrain root growth and development qualitatively, but might improve root absorb performance by improving root activity.