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１９９５～１９９６年，研究了在田间条件下，黑土和石灰性黑钙土上连作大豆对营养元素的吸收。试验结果表明，连作胁迫对大豆氮的吸收影响不大；对磷、钾的吸收显著降低；而对钙的吸收量却显著地增加，在石灰性黑钙土上表现得最显著，这与大豆连作障碍的严重程度有极好的相关性。对镁的影响不规律。连作胁迫下大豆对微量元素的吸收一般是呈下降趋势，其中硼的降低最为显著。１９９５年，连作大豆体内铁、锰的含量显著降低，在石灰性黑钙土上极为显著，但１９９６年不具规律性。铜在连作大豆体内含量基本是呈下降趋势，锌在１９９５年不具规律性，但１９９６年两点的结果都表明，连作大豆体内锌含量明显降低。
From 1995 to 1996, the nutrient uptake by soybean in black soil and calcareous calcareous soil was studied under field conditions. The results showed that continuous cropping stress had little effect on the absorption of nitrogen in soybean; the absorption of phosphorus and potassium was significantly reduced; while the absorption of calcium was significantly increased, which was the most significant in calcareous calcareous soil, The severity of the contingency is excellent. The impact of magnesium is not regular. Under continuous cropping stress, the absorption of trace elements in soybean usually showed a downward trend, of which the decrease of boron was the most significant. In 1995, the contents of iron and manganese in continuous cropping soybean decreased significantly, especially on calcareous calcareous soil, but not regular in 1996. The content of copper in continuous cropping soybean basically showed a downward trend. Zinc was irregular in 1995, but the result of two points in 1996 showed that zinc content in cropping soybean decreased obviously.