【作者】 陈传明； 林之林； 王彬彬； 刘璐璐； 杨志民；

【Author】 CHEN Chuan-ming;LIN Zhi-lin;WANG Bin-bin;LIU Lu-lu;YANG Zhi-min;Agro-grassland College of Nanjing Agricultural University;

【机构】 南京农业大学草业学院；

【摘要】 在南京地区夏季高温季节,采用自然光照(晴天日最大光强1900μmol/(m~2·s)左右)、轻度遮荫(晴天日最大光强1100μmol/(m~2·s)左右)、中度遮荫(晴天日最大光强550μmol/(m~2·s)左右)和重度遮荫(晴天日最大光强90μmol/(m~2·s)左右)4种光照强度,对19份高羊茅(Festuca arundina—cea)的草坪质量性状指标进行观测。结果表明,19份材料叶片均呈现随光照强度的减弱而变窄的趋势,4种光照环境下的叶宽分别为,自然光照4.00—4.69 mm,轻度遮荫3.34—4.14 mm,中度遮荫2.82—3.23mm,重度遮荫0.97—1.35 mm。在日最大光强高于550μmol/(m~2·s)范围内正常修剪条件下,‘南选1号’的生长速度随光强减弱而提高;其余材料的生长速度无显著变化;当日最大光强低于90μmol/(m~2·s)时,所有供试材料的生长均受到抑制。自然光照下,‘美洲虎3号’和‘节水草’的草坪质量最好,6份月平均综合评分接近6;轻度遮荫下‘王朝’的草坪质量较好;中度遮荫下除‘南选1号’可以接受外,其余材料的草坪质量均差;重度遮荫下各供试材料草坪质量均极差,综合评分接近0。更多还原

【Abstract】 The turf quality characteristic indexes of 19 tall fescue varieties(strains) were researched under natural lighting(maximum daily light intensity is about 1900 μmol/(m~2·s)),slight shading(maximum daily light intensity is about 1100 μmol/(m~2·s)),medium shading(maximum daily light intensity is about 550 μmol/(m~2·s)) and heavy shading(maximum daily light intensity is about 90 μmol/(m~2·s)) in summer in Nanjing.The results of the experiment indicated that leaf widths of the experimental varieties(strains) became narrow gradually with light intensity decreasing.The range of leaf widths of the experimental varieties(strains) were 4.00-4.69 mm,3.34-4.14 mm,2.82-3.23 mm and 0.97-1.35 mm when they grew under the condition of natural lighting,slight shading,medium shading and heavy shading respectively.When the scope of maximum daily light intensity was more than 550 μmol/(m~2·s) and the turf was reasonably pruned the growth speed of ’Nanxuan 1 ’was increased with light intensity increasing,and growth speeds of the others were not significant difference.When the scope of maximum daily light intensity was more than 90 μmol/(m~2·s) the growth of all the experimental varieties(strains) were inhibited.Under natural lighting the turf quality of ’Jaguar 3’ and ’Watersaver’ were better than others and the comprehensive marking of them were close to 6;under slight shading the turf quality of’Dynasty’ was better than others;under medium shading the turf quality of the experimental varieties(strains)excluding’Nanxuan 1’were inferior;under heavy shading the turf quality of all the experimental varieties(strains) were inferior and the comprehensive marking of of them were close to 0.更多还原