CO_2加富与增加钾素供应对黄瓜苗期光合产物含量的影响

The Effect of CO_2 Enrichment and Potassium Supply for the Photosynthate in the Seeding Stage of Cucumber Plants

在营养液栽培条件下,以黄瓜品种新津研4号为材料,研究了2个CO2摩尔分数(380,1000μmol/mol)和2种钾素供应水平(50,100 mg/L)对黄瓜幼苗生物量、可溶性糖、淀粉含量的影响。结果表明:提高CO2摩尔分数(1000μmol/mol)可提高黄瓜幼苗的生物量和叶片淀粉含量;提高钾质量浓度(100 mg/L),叶片可溶性糖含量降低,但是叶片淀粉含量升高;CO2加富并同时提高钾素质量浓度(1000μmol/mol+100 mg/L)可明显提高黄瓜幼苗的生物量,可促进叶片淀粉的累积,并且有助于可溶性糖从叶片向茎和根的运输。

The nutrient solution were carried out to study the effects of two atmospheric CO2 mole frac tions （380, 1 000 p, mol/mol） and two potassium mass concentrations （50, 100 mg/L） on biomass, sol uble sugar and starch content in the seeding stage of cucumber （Xinjinyan 4）. The results show that in- creasing CO2 mole fraction （1 000μmol/mol） could increase biomass and starch content of leaf in the seeding stage of cucumber plants. When potassium mass concentration increasing （ 100 mg/L）, leaf sol- uble sugar content decreased, but starch content increased. It is concluded that the interaction of CO2 enrichment and increased potassium mass concentration （ 1 000 μ mol/mol ＋ 100 mg/L） can obviously increase the biomass in the seeding stage of cucumber plants, can promote the accumulation of starch in leaves and help the translocation of photosynthetic products from leaves to roots and stems.