There is a decreasing trend in soil available potassium…
土壤速效钾有下降的趋势。
Soil fungi number and urease activity were negative correlation with soil available potassium content.
土壤真菌数量、脲酶活性与有效钾含量呈负相关。
During the whole growing period, the soil available potassium contents were always detracting, but the contents of total potassium in soil had changed little.
在烟株的整个生育过程中，土壤速效钾含量一直在降低，土壤全钾含量变化幅度较小。
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