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研究了玉米根茬留田与土壤有效微量元素在玉米不同生育时期的动态关系。结果表明，无论在玉米生长发育的任何时期，玉米根茬留田的土壤有效微量元素均高于相应的刨茬对照，即玉米根茬在其腐解过程中，改善了土壤的理化性状，加强了不可给态微量元素向可给态（有效态）的转化，从而提高了土壤微量元素的有效性，培肥效果明显。从试验结果还可看出，玉米对不同的微量元素有不同的吸收高峰期。
The dynamic relationship between residual cropland of corn and soil available trace elements during different growth stages of maize was studied. The results showed that at any period of corn growth and development, the available trace elements in soil were higher than that of the corresponding stubble control. That is, the stubble of corn improved the physicochemical properties of soil during the decomposing process, Do not give the state of trace elements to the available state (effective) conversion, thereby enhancing the effectiveness of soil trace elements, fertilizer effect is obvious. It can also be seen from the test results that corn has different absorption peak periods for different trace elements.