CO2加富对番茄株高、茎粗及光合作用的影响

Effects of enriching the concentration of CO2 on the plant heignt and stem diameter and photosynthesis of tomato

试验以佳粉15号番茄品种为材料,研究了不同浓度CO2加富(CO2浓度分别为大气浓度,500~700,700~900,900~1000mg/kg)对番茄形态及光合作用的影响,并以此确定最适合番茄生长的CO2浓度,旨在为呼和浩特地区今后番茄种植提供理论依据。结果表明:随着CO2浓度的增加,番茄株高增高,茎粗增大,但叶绿素a、叶绿素b和叶绿素总含量随之减少。说明CO2浓度增加可以促进番茄株高、茎粗的生长,CO2加富对番茄光合作用产生了有利影响,900~1000mg/kg是试验区间内最能够增强番茄植株光合作用的CO2加富浓度。

Effects of enriched concentrations of CO2 on tomato morphological growth and photosynthesis were studied in this experiment with “Jiafen15” tomato as the research object,and the optimum concentration of CO2 for tomato growth was determined to provide a theoretical basis for tomato cultivation in this area.The concentrations of CO2 released in the experiment were atmospheric concentrations at 500-700,700-900,and 900-1000 mg/kg.The results showed that with the increase of CO2 concentration,the plant height and stem diameter of tomato increased,but the contents of chlorophyll a and b,and the total chlorophyll decreased.These results suggest that the CO2 concentration can increase the plant height and stem diameter of tomato,but the chlorophyll content in tomato leaves decreased with the increase of CO2 concentration.The lowest CO2 enrichment concentration which can best enhance the photosynthesis of tomato is at 900-1 000 mg/kg.