日光温室茄子不同生育期CO_2浓度变化动态

Dynamic Change of CO_2 Concentration in Greenhouse at Different Growth Stage of Eggplant

日光温室茄子尽管施用足量的有机肥 ,但棚内 CO2 浓度还是较低 ,中午放风时冠层浓度只有 2 6 0～ 80 0 mg/ L,略高于外界浓度。茄子定植后 110天时 CO2 积累最快 ,从下午 17:0 0至第二天早晨 7:0 0 CO2 平均增加 10 9mg/ L.h,同时日出后 7:5 0～ 9:4 0冠层中 CO2 浓度下降量最多 ,平均下降 97mg/ L.10 min。

Although sufficient manure is applicated,CO 2 concentration in non-heated greenhouse still remains at low level immediately after ventilation.The CO 2concentration in canopy ranges between 260 to 800 mg/L,slightly higher than it at outdoor.The peak accumulation of CO 2 occurs 110 days after transplant from 17∶00 p.m. to 7∶00 a.m.,with an average accumulation rate of 109 mg/L.In the mean time,the peak deduction of CO 2 occurs from 7∶50 a.m. to 9∶40 a.m.,and the average deduction rate reaches 97 mg/L.10min.