小麦植株对重金属铬吸收累积的研究

为研究重金属Cr在小麦植株吸收、积累规律，为Cr污染修复与防治提供一定的依据。试验以矮抗58为供试品种，采用大田种植和盆栽试验，测定小麦不同生育期、不同部位的Cr含量，研究小麦植株中Cr吸收和累积的动态变化。结果表明，小麦植株中Cr含量较多的部位为根，而籽粒中含量较低。Cr的吸收速率以灌浆中末期最快，其次是返青一拔节期，出苗期至分蘖期最慢。并通过测定土壤Cr含量、成熟期籽粒Cr含量等建立回归方程，以此预测籽粒中Cr的含量。

Uptake and Accumulation of Chromium in Wheat

It frequently occurs that the chromium（Cr）badly affects the growth of wheat（ Triticum aestivum L.）. Controlling Cr uptake is a critical factor for wheat and its growth in Cr polluted environment. The regulation of Cr-uptake and accumulate in wheat plants during their growing were studied.The semi-winter wheat（ Aikang 58 ） was chosen to cultivate in the pot and in the field. The results were as follows：The roots had more Cr than any other wheat organs in the harvest stage. There was a little Cr in the seeds at the same stage. As for the Cr uptake speed, the fastest was in the middle to late filling stage. Tile speed at returing green stage to jointing stage was slower than that at the filling stage. The speed at seeding stage to tillering stage was the slowest. At the same time, in the pot experiment, the regression equation between the Cr content in soil and mature seeds was set up. So, the content in soil can be known before the wheat are planted, the Cr content in seeds can be figured out.