摘要
对不同季节不同天气条件下温室内叶用莴苣光合作用日变化规律进行了系统研究。结果表明 ,在夏秋季晴天光合作用呈现双峰曲线 ,越是高温强光 ,峰值出现越早 ;在冬季低温下晴天光合作用呈单峰曲线 ;不同季节的阴到多云天气光合速率都随着光强的升降而升降。光合作用的高峰在一天中持续 3～ 4h ,若上午低温或弱光 ,光合速率较低 。
The tests of daily variation of photosynthetic rate of butterhead lettuce grown in greenhouse are conducted.The results show that the daily variation of photosynthetic rate is a two peak curve in sunny days in summer and autumn season.While in winter with lower temperature,it is a one peak curve pattern.In the cloudy and raining days,the change of photosynthesis just follow the change of radiation.The photosynthesis maintaining at its high value is not more than 3-4 hours within a day.If the radiation and temperature cannot meet the need of crop in the morning,it is still possible to produce a photosynthetic peak in the afternoon with suitable environment factors for the crop photosynthesis.
出处
《园艺学报》
CAS
CSCD
北大核心
2001年第3期240-245,共6页
Acta Horticulturae Sinica
基金
国家自然科学基金资助项目! (39870 15 3)
关键词
莴苣
叶用莴苣
光合作用
日变化
温室
Lettuce
Butterhead lettuce
Photosynthesis
Daily variation
Greenhouse
