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为明确北方地区普通日光温室辣椒栽培时CO_2适宜浓度,以“朝研牛角椒”为材料,探究CO_2加富[350±50μL/L(CK)、600±50μL/L(C1)、800±50μL/L(C2)、1000±50μL/L(C3)]对辣椒幼苗生长、叶片SPAD值、净光合速率(P_n)、气孔导度(G_s)、胞间CO_2浓度(C_i)以及蒸腾速率(T_r)的影响。结果表明:CO_2加富使辣椒幼苗株高、茎粗、叶面积、叶片SPAD值显著提高;同时也显著提高辣椒幼苗P_n、C_i,一定程度上降低叶片G_s和T_r;且CO_2浓度为(800±50)μL/L时效果最明显。
In order to clarify the suitable concentration of CO_2 in greenhouse cultivation of common sunlight greenhouse in northern China, the effects of CO_2 enrichment [350 ± 50μL / L (CK), 600 ± 50μL / L (C1), 800 The leaf photosynthetic rate, net photosynthetic rate (P_n), stomatal conductance (G_s), intercellular CO_2 concentration (C_i) and transpiration rate (T_r) of the impact. The results showed that CO2 enrichment increased the plant height, stem diameter, leaf area and leaf SPAD of pepper seedling while significantly increased the P_n and C_i of pepper seedlings and decreased the G_s and T_r of leaves to some extent. The CO_2 concentration was (800 ± 50) μL / L the most obvious effect.