Spore density was also significantly correlated with soil available n.
2
不同处理耕层土壤速效氮含量营养阶段均高于生殖阶段，速效磷含量则相反。
The content of available nitrogen in plough layer at the vegetative stage is higher than that at the reproductive stage, but opposite for available phosphorus.
3
土壤速效氮含量偏高是烟叶烟碱含量偏高和多数烟叶样品糖碱比偏低的一个重要原因。
One of the major reason of high nicotine in most samples was the high nitrogen content in soil.
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