矮壮素对中薯3号生理特性的影响研究*

 对马铃薯品种“中薯3号”的苗期植株喷施不同浓度的矮壮素(CCC，0 g/L，1.5 g/L，2.0 g/L，2.5 g/L），研究CCC对植株生理特性的影响；应用³²P示踪技术测定叶片中磷的含量。结果表明,CCC对叶片中磷的含量升高有影响，CCC浓度为2.0 g/L能明显促进植株在各生长时期叶片对含磷量的吸收；CCC使中薯3号在出苗后36 d的叶片净光合速率、细胞间CO₂浓度和气孔导度均低于对照，而在出苗后的46 d、56 d和66 d 叶片净光合速率、细胞间CO₂浓度、气孔导度和蒸腾速率最高；在中薯3号的生育期为36 d、46 d和56 d时，叶片含磷量与其净光合速率、细胞间CO₂浓度、气孔导度和蒸腾速率都有显著的正相关关系。喷施不同浓度的CCC能增加中薯3号的产量，最高增产达10.10%。

Effect of Chlorocholine Chloride, Chlormequat on the Physiological Characteristics of the Potato Variety Zhongshu No.3

The effect of Chlorocholine Chloride,Chlormequat(CCC) on the physiological characteristics of the potato variety Zhongshu No.3 was studied by spraying different concentrations of CCC(0 g/L,1.5 g/L,2.0 g/L,2.5 g/L) at the seedling stage.Using32P tracer technology,it was found that CCC increased the content of phosphate(P) in leaves and 2.0 g/L of CCC increased the highest content of P in leaves at every stage.The net photosynthetic rate,stomatic conductance and intercellular CO2 concentration of Zhongshu No.3 sprayed with CCC were inferior to those of control at the growth period of 36 d.2.0 g/L of CCC had the best effect on the net photosynthetic rate,stomatic conductance,intercellular CO2 concentration and transpiration rate of Zhongshu No.3 at the growth stage of 46 d,56 d and 66 d.There was a significantly positive correlation between content of P in leaves and the net photosynthetic rate,stomatic conductance,intercellular CO2 concentration and transpiration rate in Zhongshu No.3.The relative average yield per plant increased by 10.01% through spraying Zhongshu No.3 with 2.0 g/L CCC.