夏季高温对不同草地早熟禾品种坪用质量的影响  

Effect of summer high temperature on turf qualities of different Poa pratensis varieties

作　　者：赵海明[1] 刘君[1] 杨志民[1] 

机构地区：[1]南京农业大学草坪研究与开发工程技术中心,江苏南京210095

出　　处：《草业科学》2010年第1期4-10,共7页Pratacultural Science

基　　金：国家科技支撑计划(2006BAD01A19-4-5)

摘　　要：以9个草地早熟禾Poa pratensis品种为材料,夏季在南京田间观测了各品种的草坪盖度、密度、表观质量、SPAD值和叶宽变化动态,实验室测定了叶片含水量和质膜透性。结果表明,随着夏季高温伏旱强度的增加和持续时间的延长,各品种的草坪盖度、密度、综合质量、SPAD值、叶片组织含水量均持续显著下降,叶片质膜透性变大,叶片宽度变化并不显著。通过层次聚类分析,供试的9个草地早熟禾品种对高温的反应可分为3类,第1类是Park和Bluemoon,耐热性弱;第2类是Total、Award、America、Nuglade和Liberator,耐热性中等;第3类是Barrister和Nudesting,耐热性强。Nine Poa pratensis varieties were used to investigate their turf qualities including changes of turf coverage, tiller density, turf quality, SPAD, leaf width in the field during summer of Nanjing, and physiological characteristics such as water content and membrane permeability in leaves were measured in lab. The results showed that coverage, tiller density, turf quality, SPAD and water content of varieties declined significantly along with increase of heat and drought stress and persisting period. The membrane permeability in leaves increased remarkably and leaf width change was not signif- icant. By hierarchical cluster analysis, the 9 P. pratensis varieties could be classified into three catego- ries. Bluemoon and Park belonged to the first category which was weak in heat tolerance. Nuglade, America, Award, Liberator and Total belonged to the second category, they were mid heat tolerance varieties. Barrister and Nudesting belonged to the last category, and they had the strongest heat tolerance.

关 键 词：草地早熟禾 高温胁迫 耐热性 草坪质量 聚类分析 

分 类 号：S688.4[农业科学—观赏园艺]