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目前较多研究关注单作玉米的籽粒微量元素问题,间套作对玉米籽粒微量元素浓度和地上部吸收量的影响尚不清楚.田间试验用来研究白菜型油菜、蚕豆、鹰嘴豆和大豆对间作玉米籽粒铁(Fe)、锰(Mn)、铜(Cu)和锌(Zn)浓度及其相应地上部植株吸收量的影响.与单作玉米相比,与豆科作物间作玉米籽粒Fe,Mn,Cu和Zn的浓度及其相应的收获指数降低,而与白菜型油菜间作玉米则保持与单作玉米相同水平;但是间作促进了玉米植株地上部对Fe,Mn,Cu和Zn的吸收量.进一步研究表明,玉米籽粒产量与籽粒Fe和Cu的浓度呈显著负相关关系,而与Mn和Zn的浓度则未达到显著相关,但是所有这些籽粒微量元素浓度与相应的收获指数间均呈显著性正相关关系.因此,与蚕豆、鹰嘴豆和大豆间作玉米籽粒微量元素浓度的降低,主要是由Fe,Mn,Cu和Zn从营养器官向籽粒转移或再活化的比例降低所致,这可能与相应的玉米衰老进程减缓有关.白菜型油菜/玉米间作有利于维持玉米籽粒高产,同时未降低籽粒Fe,Mn,Cu和Zn的浓度,适合在本地区推广.
At present, more studies focus on single-crop corn trace elements, intercropping on corn grain micronutrient concentration and shoot uptake is not clear.Field trials to study cabbage rape, broad bean, chickpea and soybean pairs (Fe), manganese (Mn), copper (Cu) and zinc (Zn) concentrations in intercropping maize and corresponding uptake of above-ground plants.Compared with single-crop corn, The concentrations of Mn, Cu and Zn and the corresponding harvest indices decreased, while the intercropping with B. napus was the same as that of monocrops. However, intercropping promoted the uptake of Fe, Mn, Cu and Zn by shoots Further studies showed that there was a significant negative correlation between the grain yield of maize and the concentration of grain Fe and Cu, but not with the concentration of Mn and Zn, but the concentration of trace elements in all of these grains and the corresponding harvest index were significantly Therefore, the decrease of trace element concentrations in maize kernels with faba bean, chickpea and soybean was mainly caused by the decrease of the proportion of Fe, Mn, Cu and Zn from vegetative organs to kernels transferred or reactivated may Corresponding slows the aging process related to corn. Brassica campestris / corn intercropping help to maintain high yield of corn grain, while not reducing the grain Fe, Mn, Cu and Zn concentrations suitable for promotion in the region.