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本研究测定了６个菜豆品种单个壮龄叶片及３个菜豆品种群体的光合速率与光照强度、ＣＯ２浓度及土壤水分含量之间关系。结果表明蔓生类型的菜豆单个壮龄叶片的光合速率均高于矮生类型，而且光合速率日变化呈双峰曲线型，有明显的光合“午休现象”。矮生类型菜豆单个壮龄叶片光合速率低且光合速率日变化呈单峰曲线型。两种类型菜豆群体光合速率差异不显著，这可能是由于两种类型菜豆的株形、群体结构不同造成截获光能多少不同所致。提高土壤湿度，叶片光合速率虽能升高，但产量并非确定随之提高，因此要合理灌水。
In this study, the relationship between photosynthetic rate and light intensity, CO2 concentration and soil water content of single elder leaves and three kidney bean varieties of 6 kidney bean cultivars were determined. The results showed that the photosynthetic rate of single adventitious leaf was higher than that of dwarf, and the diurnal variation of photosynthetic rate showed a bimodal curve with obvious photosynthesis “lunch break”. The photosynthetic rate and the diurnal variation of photosynthesis rate of single dwarf leaf of dwarf type bean were single peak curve. There was no significant difference in photosynthetic rate between the two types of kidney bean populations, which may be attributed to the difference in intercepted light energy due to the different plant shape and population structure of the two types of bean. Increase soil moisture, although the photosynthetic rate of leaves can be increased, but the yield is not determined to increase, so irrigation should be reasonable.