Effects of water depth and substrate type on rhizome bud sprouting and growth in Zizania latifolia
Effects of water depth and substrate type on rhizome bud sprouting and growth in Zizania latifolia
复制标题
水深和基质类型对茭白根茎芽萌发和生长的影响
DOI：
10.1007/s11273-017-9572-9
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发表时间：
2018-06-01
影响因子：
1.8
通讯作者：
Xie, Jun
中科院分区：
文献类型：
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作者：
Li, Zhifei;Zhang, Xiaoke;Xie, Jun
菰是一种常见的挺水植物，在长江中下游流域湖泊生态修复中发挥着重要作用。了解Z分布相对变化背后的机制。在大田条件下，分析了不同水深和基质类型对大叶黄杨根状茎芽萌发和生长的影响。通过模拟试验，四个水深（0，30，60，和90厘米）和三种基质类型（桑迪壤土，粘壤土，粉土）。结果表明：（1）水深对RBS有显著影响，RBS百分比随水深的增加而显著降低。然而，基质类型及其与水深的相互作用对RBS没有影响。(2)双向方差分析（ANOVA）表明，株高，茎粗和根长的水深的影响显着，与观察到的最高值在水深为0厘米。只有根长受基质类型及其与水深的交互作用影响显著，且在粉土中最高。(3)水深及其与基质类型的交互作用对梭梭总生物量和根冠比均有显著影响。宽叶型的影响不显著，而基质型的影响不显著。研究结果将为长江中下游湖泊生态修复提供参考。
Zizania latifolia is a common emergent macrophyte that plays an important role in the ecological restoration of lakes in the middle and lower reaches of the Yangtze River basin. To understand the mechanisms behind the relative changes in the distribution of Z. latifolia in the field, we analyzed the effects of water depth and substrate type on rhizome bud sprouting (RBS) and growth in Z. latifolia through simulation experiments. Four water depths (0, 30, 60, and 90 cm) and three substrate types (sandy loam, clay loam, and silt) were used. The results showed that: (1) water depth significantly affected the RBS, and the RBS percentage significantly decreased with increasing water depth. However, substrate type and its interaction with water depth had no effect on RBS. (2) Two-way analysis of variance (ANOVA) showed that plant height, stem diameter, and root length were significantly affected by water depth, with the highest values observed at a water depth of 0 cm. Only root length was significantly affected by substrate type and its interaction with water depth, and it was highest in silt. (3) Both water depth and its interaction with substrate type had significant effects on total biomass and the root:shoot ratio in Z. latifolia, but no significant effect was found when it came to subtrate type. The results of this study will be useful for the ecological restoration of lakes in the middle and lower reaches of the Yangtze River basin.