【摘要】 在田间条件下对阜城杏梅的光合特性进行了研究。结果表明,阜城杏梅净光合速率日变化为双峰曲线,第一次高峰出现在9:00左右,Pn为17.5CO2μmol.m-2.s-1,第二次高峰出现在16:00左右,Pn为11.7 CO2μmol.m-2.s-1,13:00左右为最低值,Pn为7.9 CO2μmol.m-2.s-1,净光合速率有明显的"午休"现象;Gs日变化与Pn日变化基本一致;Ci日变化曲线和Pn基本相反。其光饱和点为1733μmol.m-2.s-1,光补偿点为62μmol.m-2.s-1;光合表观量子效率为0.0451;CO2补偿点为52μmol.mol-1,饱和点为982μmol.mol-1。更多还原

【Abstract】 Photosynthetic characteristics of Fucheng mume cultivar were studied in the field experiments.Results showed that photosynthetic rate variation of Fucheng mume in a day was two-peaks curve.The first peak was at about a.m.9 and Pn was 17.5 CO2 μmol·m-2·s-1,and the second was at about p.m.16 and Pn was 11.7 CO2 μmol·m-2·s-1.The photosynthetic rate at about p.m.13 was lowest and Pn was only 7.9 CO2 μmol·m-2·s-1 and noon breaking was visible.Gs variation curve was similar to Pn variation curve,but Ci variation curve was on the contrary.Light saturation point of leaves was 1733 μmol·m-2·s-1 and light compensation point of leaves was 62 μmol·m-2·s-1 and photosynthetic apparent quantum yield of was 0.0451.CO2 compensation point of leaves was 52 μmol mol-1 and CO2 saturation point was 982 μmol mol-1.更多还原