阳台栽培对蔬菜光合日变化的影响

Effects of Balcony Cultivation on Diurnal Variation of Vegetables Photosynthesis

为探究阳台蔬菜种植的适应性,以羊角椒、牛角椒、菜心、樱桃番茄和马蹄番茄为材料,分别测定在阳台栽培下的光合参数日变化。结果表明,不同蔬菜的净光合速率与气孔导度的日变化规律基本相似,在上午9:00—10:00有最大值,中午出现午休现象,并在午后缺少直射光的环境下,有较大幅度下降;蒸腾速率的变化呈先升后降的趋势,不同蔬菜的蒸腾速率变化较大;胞间CO_(2)浓度的日变化为倒抛物线;水分利用率呈下降趋势。相关性分析结果表明,阳台蔬菜的净光合速率与气孔导度、蒸腾速率、水分利用率具有较强的正相关。

Hot pepper varieties‘Yang Jiaojiao’(sheep horn shape)and‘Niu Jiaojiao’(bull horn shape),Chinese cabbage,cherry tomato and horseshoe tomato were planted on the balcony to observe their diurnal changes of photosynthetic parameters in order to find their suitability for planting on the balcony.The results showed that the diurnal changes of net photosynthetic rate and stomatal conductance of different vegetables are basically similar,with a maximum at 9:00-10:00 in the morning,midday depression of photosynthesis at noon,and a greater difference in the absence of direct sunlight in the afternoon.The transpiration rate tended to rise and then decline,and changed greatly in different vegetables.The daily change of intercellular CO_(2) concentration showed an inverted parabola,and the water utilization rate showed a downward trend.The correlation analysis demonstrated that the net photosynthetic rate has a high positive correlation with stomatal conductance,transpiration rate and water utilization rate.