摘要
本试验以大棚黄瓜‘冬美11’为材料,在不同天气下采用美国LI-COR公司生产的LI-6400型便携式光合仪测定了结瓜期的净光合速率,及其与其它影响因子的相关性.结果表明:无论晴天还是阴天,大棚黄瓜的净光合速率、光合有效辐射、气孔导度和蒸腾速率均呈单峰型变化,胞间CO2浓度无论晴天还是阴天均呈"U"形变化,叶温无论晴天还是阴天均呈倒"U"型变化;晴天黄瓜Pn的最优化方程为:y=24.18+0.004 1x1-0.239 0x2+15.6114x3-0.071 8x4,阴天为:y=77.740 4+0.038 6x1+8.035 1x3-2.878 6x5;偏相关分析和通径分析表明:晴天影响因子对Pn影响的顺序为:气孔导度>光合有效辐射>胞间CO2浓度>蒸腾速率.阴天顺序为:光合有效辐射>叶温>气孔导度.
Photosynthetic factors in fruiting stage of cucumber （cv.Dongmei 11） cultivated in plastic film shelter were measured and analyzed their correlation by photosynthesis measure system（LI-6400,LI-COR Corporation of America）.The result indicated that net photosynthetic rate,photosynthesis effective radiation,stomatal conductance and transpiration rate of fruit showed single-peak curve whenever in sunny day or in cloudy day.The concentration of intercellular space CO_2 changed as ＇U＇ type,and the leaf temperature changed as inverted ＇U＇ type.The optimization equation of P_n in sunny day attained by the method of stepwise multi-regression was： y=24.18＋0.004 1x_1-0.239 0x_2＋15.611 4x_3-0.071 8x_4;in cloudy day was：y=77.740 4＋0.038 6x_1＋ 8.035 1x_3-2.878 6x_5.The analysis of partial correlation and path showed that the diurnal variation of P_n had significant correlation with PAR and C_s,the order of effecting ability was C_sPARC_iT_r in sunny day and PART_leafC_s in cloudy day.
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2010年第2期79-82,共4页
Journal of Gansu Agricultural University
基金
河南省农业厅农业结构调整项目(2005-219)
关键词
黄瓜
不同天气
光合特性因子
相关性
cucumber
different weather
photosynthetic characteristics factors
correlation
