干旱胁迫下鸭茅苗期生长特性及耗水规律  

Study on the Growth Characteristics and Water Consumption Law of Dactylisglomerata Seedling under Drought Stress

作　　者：李江艳 张鲜花[1] 袁小强 袁惠 刘雯欣 LI Jiangyan;ZHANG Xianhua;YUAN Xiaoqiang;YUAN Hui;LIU Wenxin(Key Laboratory of West Arid Region Grassland Resources and Ecology/College of Pratacultural and Environmental Sciences,Xinjiang Agricultural University, Urumqi 830052, China)

机构地区：[1]新疆农业大学草业与环境科学学院/新疆草地资源与生态重点实验室,乌鲁木齐830052

出　　处：《新疆农业科学》2022年第6期1502-1512,共11页Xinjiang Agricultural Sciences

基　　金：新疆维吾尔自治区自然科学基金(2017D01A31)。

摘　　要：【目的】研究不同水分条件下鸭茅生长特性及耗水规律。【方法】以7份来源不同的鸭茅为材料,观测其生长特性,用称重法研究其耗水变化。【结果】(1)随干旱胁迫增大,各材料生长速度减缓,株高、分蘖数、地上及地上生物量逐渐降低;(2)7份鸭茅材料的耗水规律基本一致,随干旱胁迫增大,耗水量呈现逐渐降低趋势,但材料间耗水特性存在差异;(3)综合生长发育及耗水特性,新疆尼勒克县鸭茅表现最优,其次美国俄勒冈鸭茅,新疆乌鲁木齐市鸭茅表现最差。【结论】不同种源鸭茅随干旱胁迫增强生长特性及耗水均呈现降低趋势,新疆野生鸭茅具有一定的抗旱性,优于两栽培品种。【Objective】To explore the growth characteristics and water consumption of D.glomerata under drought stress.【Method】Seven D.glomerata materials from different sources were used as the research objects to observe their growth characteristics.The weighing method was used to study the change in water consumption.【Result】(1)As the drought stress increases,the growth rate of each material slowed down,and the plant height,tiller number,and above-ground and above-ground biomass gradually decreased;(2)The water consumption law of the seven D.glomerata materials was basically the same and increased with the drought stress;Water consumption showed a gradual decrease trend,but there were differences in water consumption characteristics among materials;(3)Comprehensive growth and development and water consumption characteristics showed that D.glomeratas in Nilek County,Xinjiang had the best performance,followed by Dactylus Oregon in the United States and D.glomerata in Urumqi,Xinjiang.【Conclusion】The growth characteristics and water consumption of Dactylis from different provenances show a decreasing trend with the increase of drought stress.In general,Xinjiang wild Dactylis has a certain drought resistance and is better than the two cultivated varieties,so it has important cultivation value.

关 键 词：鸭茅 干旱胁迫 生长特性 耗水特性 水分利用率 综合评价 

分 类 号：S54[农业科学—作物学]