摘要
以大豆“中黄 1 4”为试验材料 ,利用OTC 1型农田开顶式气室 ,首次模拟研究单独CO2和O3浓度倍增及其交互作用对大豆生物量、产量及其构成因子、同化产物分配形式和收获指数的影响。与未通CO2 和O3的处理相比 ,单独CO2 浓度倍增对生物量、产量、荚果串数、荚数、籽粒数、籽粒重具有正效应 ,O3为明显的负效应 ,通气时段越长效果越明显 ;持续的CO2 浓度和O3浓度倍增交互作用表现为CO2 的影响大于O3;CO2 和O3交互作用逐渐达到浓度倍增的处理 ,由于O3剂量逐渐累积和阶段性增加 ,对大豆刺激逐渐增强 ,最终O3的负效应与CO2 的正效应相近。单独O3浓度倍增抑制光合产物向根和籽粒的输送 ,向叶茎的输送明显增强 ,使根冠比 (RSR)、子粒与茎杆比 (GCR)明显下降 ,长期作用可使大豆收获指数 (HI)减小 ,叶重比 (LWR)显著增加 ,且随通气时间的延长影响增大 ;CO2 浓度倍增及其交互作用对RSR、LWR、GCR和HI影响相对较小 ,仅在± 1 0
The single or interactive effects of double CO 2 and O 3 concentrations on soybean (Glycine max L. Merr.) are investigated for first time by using a soybean cultivars, Zhonghuang 14, in an open top chamber. Contrasting to the control, the effects of doubled CO 2 concentration alone on soybean biomass,yield,legumen bunches, legumen numbers, grain numbers and weight are positive, but the effects of doubled O 3 concentration alone on the above parameters are obviously negative; and the longer the ventilation time periods are,the more obvious the effects are. When both CO 2 and O 3 concentrations are doubled, their interaction shows that the effect of CO 2 is greater than that of O 3. In the process of CO 2 and O 3 concentrations increasing gradually, the negative O 3 effect approached the positive CO 2 effect eventually because of the gradually cumulating O 3 concentration and gradually increasing stimulation. The doubled O 3 concentration alone suppresses photosynthetic products into the soybean roots and grains, but increases those into soybean stems and leaves, resulting in the reduced root/shoot ratio (RSR) and grain/culm ratio (GCR). The long period effect reduces Harvest Index (HI) and increases Leaf Weight Ratio (LWR) markedly. With the ventilation time prolonged the effects are more remarkable. The interactive effects of doubled CO 2 and O 3 concentrations on the RSR、LWR、GSR and HI are relatively slight, only within ±10%.
出处
《应用气象学报》
CSCD
北大核心
2003年第2期245-251,共7页
Journal of Applied Meteorological Science
基金
国家自然科学基金 (批准号 4 98992 70 )资助
关键词
二氧化碳
臭氧
交互作用
大豆
产量
生物量
Doubled CO 2 and O 3 concentration Interaction Soybean production Biomass
