论文部分内容阅读
对我国主要栽培的２１种蔬菜作物的光合与蒸腾特性进行了研究。通过测试和回归分析，确定了各种蔬菜作物的光补偿点、光饱和点、ＣＯ２补偿点、ＣＯ２饱和点和蒸腾速率，可作为合理群体结构的调控、保护地ＣＯ２施肥、合理灌溉的理论依据和指标。研究结果还表明，大多数蔬菜光合速率和蒸腾速率的日变化呈双峰曲线，两“峰值”分别出现在１１∶００和１３∶３０～１４∶００前后（因蔬菜种类和测定季节而异），１３∶００有一“低谷”即“午休”；“峰值”和“谷值”大小因蔬菜种类而异。
The photosynthetic and transpiration characteristics of 21 main vegetable crops grown in China were studied. The light compensation point, light saturation point, CO2 compensation point, CO2 saturation point and transpiration rate of all kinds of vegetable crops were determined by testing and regression analysis, which could be used as the theoretical basis for rational population structure control, CO2 fertilization in protected area and reasonable irrigation And indicators. The results also showed that the diurnal changes of photosynthetic rate and transpiration rate of most vegetables showed a bimodal curve, with the two “peaks” appearing at 11:00 and 13:30 ~ 14:00 respectively (due to different vegetable types and seasons) , There is a “trough” or “lunch break” at 13:00; the size of “peak” and “bottom” varies depending on the type of vegetable.