At the mean time, D fertilizer particle microcapsules were made with higher content of K but median content of N to meet the demands of tobacco plant at middle and later stage and promote maturity.
同时，为满足烟株中后期的养分需求及促进成熟落黄，制作重钾适氮的缓释肥包膜D粒子。
The K-Factor correlated linearly with dust concentration, this is due to the variation of dust particle median diameter.
这种影响是由于粉尘颗粒中位径变化而引起的。发尘源非连续发尘时不但引起粉尘浓度变化，而且引起中位径改变。
The aboveground standing crop was significantly positively correlated with total K, total P and quantity of fine particle at the level of P<0.05;
分别与粗颗粒和细颗粒在0.05水平下呈显著正相关和负相关关系。
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