日光温室内外杏叶片光合特性研究

Study on Photosynthesis of Apricot Leaf in and out Greenhouse

以凯特杏为试材,研究了日光温室内外杏叶片的光合特性。结果表明:日光温室内凯特杏叶片的净光合速率的日变化呈双峰曲线,光补偿点和饱和点以及CO2补偿点和饱和点均低于露地。温室内不同部位的净光合速率、光补偿点和饱和点、CO2补偿点和饱和点也存在明显差异。净光合速率绝对值、光补偿点、光饱和点、CO2饱和点南部高于北部和中部;CO2补偿点北部高于中部和南部。水分利用效率从高到低依次为南部、露地、北部、中部。

The photosynthesis of the leaves of apricot ＂Katy＂ grew in Huanghuai improved energy-saving greenhouse was studied using apricot ＂Katy＂ as experimental material. The results showed that in greenhouse cultivation conditions, the diurnal variation of net photosynthetic rate displayed double-peak curve, and the light compensation point/saturation point as well as the CO2 compensation point/saturation point were lower than in open field. Significant differences in the net photosynthetic rate, the light compensation point/saturation point and the CO2 compensation point/saturation point were observed in different parts of the greenhouse. The absolute value of net photosynthetic rate, the light compensation point/saturation point and CO2 saturation point in the Southern part were higher than in the Northern and central parts but CO2 compensation point in the Northern part was higher than in the Southern and central parts. Also, water use efficiency from high to low in turn was as：the Southern part, the open field, the Northern part and the central part.