摘要
冀西北坝上旱滩地田试水分处理对地膜覆盖下萝卜光合特性的影响。结果表明,地膜覆盖处理与对照相比,浇相同量的水,会降低功能叶片中叶绿素的含量;播种后40 d,覆膜处理的萝卜功能叶片光合速率较对照高,增长幅度也大,且各处理均在播种后40 d达到了最大光合速率。水分处理后,萝卜功能叶片的光合速率和蒸腾速率的日变化均表现为低—→高—→低的趋势,而水分利用效率日变化则表现为高—→低—→高的趋势;地膜覆盖处理与对照相比,在浇水量相同的情况下,其光合速率没有增加,但蒸腾速率在14∶00前却增加明显。
The effects of water treatment on photosynthetic characteristic of radish under plastic film mulch were studied.The results showed that Chl content of treatment was less than that of the contrast under the same water treatment.After 40d of seeded,photosynthetic rate of treatment excelled the contrast,and photosynthetic rate of all treatments reached the peak.After water irrigated,photosynthetic rate and transpiration rate of radish had the same trend,but water use efficiency was reverse;photosynthetic rate of treatment did not increase,but transpiration rate increased remarkablely before 14∶00 under the same water treatment.
出处
《干旱地区农业研究》
CSCD
北大核心
2008年第5期60-64,89,共6页
Agricultural Research in the Arid Areas
基金
河北省“十一五”科学技术研究与发展计划项目(06220901D)
关键词
坝上地区
萝卜
地膜覆盖
水分
光合特性
Bashang Region
radish
plastic film mulching
water
photosynthetic characteristic
