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植物根系附近的养分浓度梯度只存在于离根几毫米的距离之内。由于缺少测定这部分土壤中养分的适当方法,使这个领域的研究受到限制。Bhat等曾指出,植物根系附近土壤中磷和铷的分布可以用放射性自显影的方法来测定。但是,这种方法受到供武元素是否具有合适的放射性同位素的限制。
The nutrient concentration gradient near the plant root only exists within a few millimeters of the root. Research in this area is limited by the lack of suitable methods of determining the nutrients in this part of the soil. Bhat et al. Have pointed out that the distribution of phosphorus and rubidium in soil near plant roots can be determined by autoradiography. However, this method is limited by the availability of suitable radioisotopes for the element of force.