先旱后涝胁迫下水稻茎蘖及株高动态响应  

Rice tillering and plant height dynamic responses to drought and flood alternating stress

作　　者：张逸迪 俞双恩[1,2] 高世凯[1] 王梅[1] 王姣[1] 李偲 ZHANG Yidi;YU Shuang＇en;GAO Shikai;WANG Mei;WANG Jiao;LI Si(College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, Jiangsu 210098, China;Key Laboraory of Efficient Irrigation - Drainage and Agricultural Soil - Water Environment in Southern China, Ministryof Education, Hohai University, Nanjing, Jiangsu 210098, China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]河海大学南方地区高效灌排与农业水土环境教育部重点实验室,江苏南京210098

出　　处：《排灌机械工程学报》2018年第1期77-81,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51479063;41401628);江苏省水利科技项目(2014075;2015087);中央高校基本科研业务费专项(2016B42114)

摘　　要：为了解先旱后涝胁迫下水稻的茎蘖和株高生长动态,采用测坑试验方法研究先旱后涝胁迫对水稻分蘖数和株高的影响,根据分蘖变化拟合分析了水稻茎蘖消长动力学模型,根据株高动态变化拟合了Logistic增长模型.试验结果表明:先旱后涝胁迫过程在分蘖期和拔节孕穗期均不同程度地抑制水稻分蘖;水稻在分蘖期、拔节孕穗期及抽穗开花期受涝可促进株高增长,在分蘖期、拔节孕穗期及抽穗开花期受旱则抑制株高增长;茎蘖消长动力学模型较好地拟合了茎蘖消长的过程,具有实践意义;Logistic模型拟合株高动态变化拟合度也较高,且适用合理.研究结果可为合理制定灌溉方案和提高水稻产量提供依据.In practice of rice production,rice plants are often in drought and flood alternating stress.In order to understand rice tillering and plant growing dynamics under drought and flood alternating stress,the influence of drought and flood alternating stress on number of tillering and plant height was studied using pit test.Then,a dynamic model for number of tillering was used to fit the change of tiller and a Logistic growth model was applied to fit the dynamic change of plant height.Results show that the drought and flood alternating stress can inhibit rice tillering in different degrees in tillering,jointing booting and flowering stages.Specially,flood can promote,but drought can suppress rice plant height to grow in tillering,jointing booting and flowering stages.The dynamic model can fit the number of tillers well and has practical significance.The Logistic model can fit the dynamic height better and is feasible.The results in the paper can provide an effective and scientific basis for proposing rational irrigation schemes and improving rice yield.

关 键 词：水稻 先旱后涝胁迫 分蘖数 株高 增长模型 

分 类 号：S27[农业科学—农业水土工程]