反馈的养分元素，也许是相当重要的。
The element of feedback in rhizosphere process systems is probably considerable.
不同的土地利用方式可引起土壤养分元素的含量和空间分布的不同。
In different land utilizing, the contents and space distribution of nutrients were different.
氮肥和钾肥提高结球甘蓝养分元素的吸收数量，促进边叶钙和镁向叶球转移。
Nitrogen and potassium fertilizer enhanced the nutrient uptakes, and the translocation of ca and Mg from side leaves to heads.
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