罗汉果一生姜问作对生姜光合特性和产量的影响

【目的】探讨罗汉果与生姜问作对生姜光合特性和产量的影响，为罗汉果间作生姜种植提供参考。【方法】2011年进行大田实验，设3个处理，分别为罗汉果棚式栽培间作生姜（P）、罗汉果立式栽培间作生姜（L）、裸地栽培生姜（CK），比较不同栽培方式对生姜光合特性和产量的影响。【结果】罗汉果棚式栽培间作生姜条件下，生姜叶片的净光合速率在生长前期略高于CK，生长后期低于CK，气孔导度、胞间C0髯衣度和蒸腾速率均低于CK，产量与CK差异不大。在罗汉果立式栽培间作生姜条件下，生姜叶片的净光合速率在生长前期高于CK，生长后期略低于CK，气孔导度、胞间c02浓度、蒸腾速率低于CK，产量比CK增加68．1％。【结论】罗汉果一生姜间作可以改变生姜叶片的净光合速率，影响生姜产量，减少投入，提高土地利用率，增加经济效益。

Effects of Siraitia grosvenorii and ginger intercropping on the photosynthetic characteristics and yield of ginger

Objective ]The experiment was carried out to study the effects of Siraitia grosvenorii and ginger intercrop- ping on the photosynthetic characteristics and yield of ginger in order to provide references for their cultivation techniques. Method]In 2011, a field experiment was conducted in Guangxi University experimental teaching and scientific research base. The experimental design was a simple complete block with theree replications for three treatments which were Siraitia grosvenorii cultivation intercropping ginger （P）, vertical cultivation Siraitia grosvenorii intercropping ginger （L）, and bare land planting ginger （control）,respectively. The influence of different cultivation methods on the photosynthetic character- istics and yield of ginger was subsequently compared through those experiments. Result ]Under conditions of P treatment, ginger leaves net photosynthetic rate at early and later growth stage was slightly higher and lower than that of control, re- spectively. Stomatal conductance, intercellular CO2 content and transpiration rate were lower than those of control. No sig- nificant difference of yield was found. Under conditions of L treatment, ginger leaves net photosynthetic rate at early growth stage was higher than control, at later growth stage was slightly lower than control. Stomatal conductance, intercel- lular CO2 content and transpiration rate was lower than control, but yield increase of 68.1% was realized. Conclusion ]Sir- aitia grosvenorii and ginger intercropping can change the ginger leaves net photosynthetic rate, has positive effect on the yield of ginger by reducing expenditure, raise land utilization rate and increase economic efficiency.