多效唑对高羊茅扩展性和根系特性的调控效应  

Regulation effects of PP333 on extension of tall fescue(Festuca arundinacea)

作　　者：白小明[1,2,3] 相斐[1,2,3] 罗仁峰 孙吉雄[1,2,3] 

机构地区：[1]甘肃农业大学草业学院,甘肃兰州730070 [2]草业生态系统教育部重点实验室(甘肃农业大学),甘肃兰州730070 [3]中-美草地畜牧业可持续发展研究中心,甘肃兰州730070 [4]江苏省常熟市山水园林景观艺术有限公司,江苏常熟215500

出　　处：《草业科学》2009年第10期171-176,共6页Pratacultural Science

基　　金：甘肃省高等学校研究生导师科研计划课题"网草皮生产技术研究与应用推广"(0502-14)

摘　　要：在盆栽条件下，研究了喷施多效唑对高羊茅Festucaarundinacea单株扩展性和根系生态特性的影响．结果表明：在100～1900mg／L质量浓度范围内．多效唑能有效抑制高羊茅植株的生长速度、地上枝叶的水平扩展、地上植物量的积累和根系生长，提高根系的表面积、体积和根冠比，促进分蘖和地下植物量的积累，质量浓度越高，调控效应越明显。质量浓度大于1000mg／L时，对分蘖的影响趋缓；大于1300mg／L时，对地上最大扩展距离、覆盖面积和地上植物量的影响趋缓。质量浓度为1300mg／L时，地下植物量、根系体积最大．根冠比最高。Effects of PP333 on shoot extension and root feature of tall rescue （Festuca arundinacea Schreb. ） were conducted under inside-door pot condition. The results showed that, while the concentration of PP333 was from 100 to 1 900 mg/L, it suppressed growing speed, shoot extension, accumulation of aboveground biomass and root growth, elevated root area, volume, root-shoot ratio, tillering and accumulation of underground biomass of tall fescue; and significant correlations existed among these indexes and PP333 concentration. The tillering slowed when the concentration of PP333 over 1 000 mg/L; it had a little effects on extension distance of aboveground, coverage area and aboveground biomass when concentration of PP333 over 1 300 mg/L. The highest underground biomass, root volume and root-shoot ratio were obtained while the concentration of PP333 was 1 300 mg/L.

关 键 词：多效唑 高羊茅 扩展性 根系特性 

分 类 号：S688.4[农业科学—观赏园艺] S482.8[农业科学—园艺学]