摘要
泰安市属于典型的温带季风气候区,夏季高温天气影响红阳猕猴桃正常生长,造成叶片脱水、焦边甚至落叶。为减轻夏季高温天气对猕猴桃的伤害,以红阳猕猴桃为试材,遮阳和不遮阳为试验处理,使用PPSystems公司TARGAS-1型便携式光合作用测定系统测定环境数据和光合参数,探讨遮阳处理对红阳猕猴桃生长环境及光合参数日变化的影响。结果表明,遮阳处理能使红阳猕猴桃叶片温度最大降低3.9℃,环境中光照强度降低67.18%~90.90%,空气H_(2)O浓度降低4.28%~12.66%,空气CO_(2)浓度整体提高,最大增幅2.15%。遮阳处理能消除红阳猕猴桃光合“午休”现象,大幅提高红阳猕猴桃光能利用率,12:00光能利用率提升最大。遮阳处理虽然降低红阳猕猴桃净光合速率,但会增加维持较高水平净光合速率的时间。遮阳处理可以缓解夏季高温对红阳猕猴桃的伤害,改变小范围生长环境,影响光合作用。
Tai'an City is a typical temperate monsoon climate.High temperature in summer affects Hongyang kiwifruit's normal growth,resulting in leaf dehydration,scorched edges,and even falling leaves.To reduce damage caused by high temperatures on kiwifruit in summer,Hongyang kiwifruit was used as experimental material,with shading treatment as experimental group and unshading treatment as control group.Environmental data and photosynthetic parameters were measured using TARGAS-1 portable photosynthesis measurement system from PP Systems,to explore effects of shading treatment on growth environment and photosynthetic diurnal variations.Results showed that shading treatment could reduce leaf temperature by up to 3.9℃,reduce light intensity by 67.18%~90.90%,reduce H_(2)O concentration by 4.28%~12.66%,and increase CO_(2)concentration by a maximum increase of 2.15%.Shading treatment could eliminate photosynthetic"midday rest"phenomenon in Hongyang kiwifruit,greatly improving light energy utilization efficiency,with the most increase observed at 12:00.Shading treatment reduced Hongyang kiwifruit net photosynthetic rate,but increased time maintained at a higher net photosynthetic rate.Shading treatment could alleviate damage caused by high temperatures on Hongyang kiwifruit in summer,change growth environment in a small range,and affect photosynthesis.
作者
董丽娟
张春香
高红
张继亮
孙阳阳
李华庆
DONG Lijuan;ZHANG Chunxiang;GAO Hong;ZHANG Jiliang;SUN Yangyang;LI Huaqing(Tai'an Taishan Academy of Forestry Sciences,Tai'an Shandong 271000,China)
出处
《农业工程》
2025年第8期68-72,共5页
AGRICULTURAL ENGINEERING
关键词
猕猴桃
遮阳处理
光合参数
生长环境
环境因子
kiwifruit
shading treatment
photosynthetic parameters
growing environment
environmental factor
作者简介
董丽娟,硕士,工程师,主要从事经济林育种及栽培研究,E-mail:donglijuan945@sina.com;通信作者:孙阳阳,硕士,高级工程师,主要从事经济林育种及栽培研究,E-mail:sunyangyang91@163.com。
