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作 者 ：李元,王勋陵

期 刊 ：生态学报 2001年 21卷 1期 页码：131~135

关键词：UV-B辐射；麦田生态系统；杂草；大型土壤动物；麦蚜；

Keywords:UV B radiation, wheat field ecosystem, weeds, soil macroanimals, wheat aphids,

摘 要 ：研究了大田栽培和自然光条件下 ,模拟 UV-B辐射 ( UV-B,2 80～ 3 1 5nm)增强对麦田生态系统杂草、大型土壤动物和麦蚜种群数量动态的影响。在 UV-B辐射下 ,杂草和大型土壤动物的种类和数量降低 ,物种多样性改变 ,杂草总生物量也降低。 UV-B辐射降低麦蚜复合种群数量 ,并与麦叶粗纤维、可溶性蛋白、可溶性糖、Mg和 Zn含量有显著的相关性。UV-B辐射还导致麦蚜与麦叶 Mg、Fe和 Zn含量均显著增加。

Abstract:Influences of enhanced ultraviolet radiation(UV B,280～315nm)on population quantity dynamics of weeds,soil macroanimals and wheat aphids in the wheat field ecosystem were investigated,Under UV B radiation,species number and population quantity of weeds and soil macroanimals decreased,species diversity changed,total biomass of weeds reduced.UV B radiation decreased population quantity of wheat aphids,which were significantly correlated with HCel,soluble protein content,CHO and the concentrations of Mg and ...

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