摘要
研究了大田栽培和自然光条件下，模拟ＵＶ—Ｂ辐射（ＵＶ—Ｂ，２８０～３１５ｎｍ）增强对春小麦生物量累积和产量的影响及评估。ＵＶ—Ｂ辐射导致叶、茎、根、穗生物量和总生物量累积降低，生物量分配改变，籽粒产量降低。５．３１ｋＪ／ｍ２ＵＶ—Ｂ辐射处理还明显降低收获指数。模型分析表明，ＵＶ—Ｂ辐射降低总生物量累积速率，总生物量随ＵＶ—Ｂ辐射增加而降低。预测模型表明，１０％和２０％的臭氧衰减导致的ＵＶ—Ｂ辐射增加使籽粒产量、叶和穗生物量明显降低，而根生物量降低较小。
Influences of
enhanced ultraviolet radiation (UV-B,280315 nm) on biomass accumulation of spring wheat
colonies were investigated and assessed under field conditions. UV-B radiation resulted in
decrease of biomass accumulation of leaves, stems, roots, spikes and whole plant, changes in
the patterns of biomass partitioning, and reductions in grain yield. With 5.31 kJ/m2 UV-B
radiation, HI decreased significantly. Model analyses indicated that UV-B radiation could
decrease the accumulation rates of total biomass. The total biomass and aboveground biomass
reduced with the increase of UV-B radiation. Predictor models show that enhanced UV-B
radiation resulting from 10% and 20% depletion of global ozone have had great influence on the
decrease of grain yield and boimass of leaves and spikes, and did not have great influence on
the reduction of root biomass.
出处
《农村生态环境》
CSCD
1999年第2期28-31,共4页
Rural Eco-Environment
基金
国家自然科学基金
关键词
UV-B辐射
春小麦
生物量
产量
UV-B radiation, spring wheat colonies, biomass, yield
