摘要
在低于 30℃时番茄叶片的光合速率随温度的升高而升高 ,30℃后随温度上升 ,光合速率逐渐下降 ,但在 2 5～ 35℃范围内 ,光合速率的变化较小。土壤水分对番茄的光合作用亦有极为显著的影响 ,当土壤含水量降至70 %以下时 ,光合速率迅速下降 ,至土壤含水量达 30 %时 ,番茄的光合速率仅相当于 70 %土壤含水量时的 2 0 %左右。本试验研究还表明 ,番茄叶片的光饱和点与光补偿点分别为 1396～ 14 85 μmol.m-2 .s-1和4 8～ 5 4 μmol.m-2 .s-1,在适宜温度及饱和光强下 ,CO2 的饱和点和补偿点分别为 14 0 0 μl·L-1和 70 μl 1·L-1左右。
Photosynthetic rate of tomato leaves was increased with temperature increasing below 30℃,and decreased over 30℃. But, in the range of 25～35℃, the photosynthetic rate of leaves had a little changes. It's suggested that tomato photosynthesis can adapt to 35℃ high temperature. The conclusion can be the basement of temperature for over-summer tomato culture. Soil water contents could influence photosynthesis significantly. When soil water content was below 70%,photosynthetic rate decreased rapidly. When soil water contents was at 30%, photosynthetic rate was only about 20% of that of 70% Therefore maintaining higher soil water contents was a key measurement to keep a higher photosynthesis capability. The research also suggested that light saturation point and light compensation point of photosynthesis in tomato leaves were 1396～1485 μmol.m -2 .s -1 , and 48～54 μmol.m -2 .s -1 ,respectively. Under suitable temperature and saturation light intensity condition, CO 2 saturation point and CO 2 satturation point were 1400 μ 1.1 -1 and 70 μ 1.1 -1 , respectively.
出处
《山东农业大学学报（自然科学版）》
CSCD
北大核心
2003年第3期356-360,共5页
Journal of Shandong Agricultural University：Natural Science Edition
