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研究大田栽培和自然光条件下，模拟ＵＶ－Ｂ辐射（ＵＶ－Ｂ，２８０ｎｍ ～３１５ｎｍ ）增强对麦田生态系统Ｆｅ营养和累积的影响．在４ 个生育期中，ＵＶ－Ｂ辐射显著增加叶和穗Ｆｅ含量，显著降低根Ｆｅ 含量，并改变茎Ｆｅ 含量．叶Ｆｅ累积对ＵＶ－Ｂ辐射的响应有明显的生育期之间的差异． 分蘖期无显著变化，拔节期和扬花期显著增加，而成熟期显著降低．在各生育期，ＵＶ－Ｂ辐射显著降低叶、根和穗Ｆｅ累积．ＵＶ－Ｂ辐射显著降低春小麦不同生育期Ｆｅ总累积，在５．３１ｋＪ·ｍ － ２ ＵＶ－Ｂ辐射下，降低最显著．ＵＶ－Ｂ辐射还降低春小麦群体Ｆｅ输出．麦田土壤速效Ｆｅ含量增加是春小麦群体Ｆｅ输出降低的结果，可能导致土壤库中Ｆｅ 储量的增加．
The effects of simulated UV-B radiation (UV-B, 280nm-315nm) enhancement on Fe nutrition and accumulation in wheat field ecosystem were studied under field cultivation and natural light conditions. In four growth stages, UV-B radiation significantly increased leaf and ear Fe content, significantly reduced root Fe content, and changed stem Fe content. The response of leaf iron accumulation to UV-B radiation has significant differences between growth stages. No significant changes at tillering stage, significantly increased at jointing stage and flowering stage, but significantly decreased at maturity stage. At each growth stage, UV-B radiation significantly reduced the accumulation of leaf, root and ear Fe. UV-B radiation significantly reduced the total accumulation of Fe in different growth stages of spring wheat, under the 5.31kJ · m -2 UV-B radiation, the decrease was the most significant. UV-B radiation also reduced Fe output in spring wheat populations. The increase of available Fe content in wheat field is the result of the decrease of Fe output of spring wheat population, which may lead to the increase of Fe reserves in soil bank.