淹水条件下玉米耐淹阈值研究.PDF

安徽农业大学学报, 2013, 40(4): 585-591 Journal of Anhui Agricultural University 网络出版时间：2013-6-27 11:13:47 [URL] /kcms/detail/34.1162.S1113.018.html 淹水条件下玉米耐淹阈值研究 * 陈 敏，徐 姗，蒋丽娜，常 江 ，郜红建，章力干 (安徽农业大学资源与环境学院，合肥 230036) 摘 要：以沿淮低洼地砂姜黑土为研究对象，研究玉米对淹水胁迫的反应及水淹程度的定量表达和耐淹阈值。 试验在砂姜黑土原装土柱中进行，共设置 6 个处理，每个处理埋设相应的根袋，分别在六叶期和大喇叭口期进行淹 水。淹水期间每天取 2 个根袋测定玉米植株养分含量和生物量；淹水结束后再统一取样进行相应的测定。结果显示， 淹水对玉米生长影响很大，2 个时期的生物量均随淹水时间的延长大幅度下降，营养元素（N 、P 、K ）的吸收受到 严重抑制，六叶期比大喇叭口期更敏感。六叶期处理间生物量与淹水时间呈极显著的（0.996* ）抛物线关系。根据 方程计算，减至对照 50%生物量的淹水阈值约为 3 d ，这一结果和生物量与氮素含量或累积量的相关分析结果完全 一致。淹水严重影响玉米生长、降低生物量、抑制养分的吸收。不同时期淹水只是影响程度不同。六叶期淹水其耐 淹阈值约为 3 d。 关键词：淹水；砂姜黑土；玉米；耐淹阈值 中图分类号：S513; S152.75 文献标识码：A 文章编号：1672−352X (2013)04−0585−07 Submergence tolerance threshold of maize under flooded conditions CHEN Min, XU Shan, JIANG Li-na, CHANG Jiang, GAO Hong-jiang, ZHANG Li-gan (School of Resources and Environment, Anhui Agricultural University, Hefei 230036) Abstract: We studied the maize response to flooding stress, and quantitatively determined the expression and submergence tolerance threshold of the maize under flooded conditions in the low-lying areas along Huai River. Test was conducted in the lime concretion black soil of the Original soil column, 6 treatments were treated with burying the corresponding root bag, and flooding in six leaf stage and Huge bellbottom period, respectively. Nu- trient content and biomass of two root bags of maize stalk were measured each day during the flood, and overall measurement was performed by uniform sampling after the flood. Significant impact of water-logging on maize growth was found. For the two studied periods, biomass dropped substantially with the extension of submergence time, an