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试验研究了不同剂量等离子体对大豆不同生育期叶片光合作用特性的影响。结果表明:经等离子体处理后,大豆叶片的光合作用、蒸腾速率、气孔导度均高于对照。大豆叶片光合速率从苗期到鼓粒期逐渐增加,鼓粒期最高,尔后下降。鼓粒期剂量为1.5 A等离子体处理的大豆叶片光合速率比对照高34.1%。等离子体处理后大豆叶片的蒸腾速率和气孔导度都有不同程度的提高,其中蒸腾速率呈双峰曲线变化,气孔导度呈单峰曲线变化,二者均在鼓粒期达到最高值,分别为14.5 mmol/(m2.s)和0.75 mol/(m2.s)。鼓粒期1.5 A等离子体处理植株叶片的蒸腾速率和气孔导度分别比对照高16.2%和17.1%,说明等离子体处理后大豆叶片的光合速率在鼓粒期提高最明显,剂量为1.5 A处理效果最佳。处理后大豆的水分利用效率也高于对照。
The effects of different doses of plasma on the photosynthetic characteristics of soybean at different growth stages were studied. The results showed that photosynthesis, transpiration rate and stomatal conductance of soybean leaves were higher than those of the control after plasma treatment. The photosynthetic rate of soybean leaves increased gradually from the seedling stage to the drum stage, and reached the highest stage of druming stage and then decreased. The leaf photosynthesis rate of soybean treated with 1.5 A at the drum grain stage was 34.1% higher than that of the control. The plasma transpiration rate and stomatal conductance of soybean leaves increased with different degrees, of which the transpiration rate showed a double peak curve and the stomatal conductance showed a single peak curve, both of which reached the highest value at the drum stage 14.5 mmol / (m2.s) and 0.75 mol / (m2s). The leaf transpiration rate and stomatal conductance of leaves treated with 1.5 A at grain-filling stage were 16.2% and 17.1% higher than that of the control, respectively, indicating that the photosynthetic rate of soybean leaves after plasma treatment increased most significantly at druming stage with a dose of 1.5 A Best effect. The water use efficiency of treated soybean was also higher than that of the control.