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。
2
Based on the light absorption property of the formed suspended particle a new method for determining NH3-N by primary-secondary wavelength spectrophotometry was developed.
用依据悬浮颗粒对光吸收原理建立显色反应的主次双波长光度测定氨氮(NH_3 - N)新方法。
3
A possible ionic charge state distributions of He, c, n, o, ne, Mg, si, s and Fe in solar energetic particle events is presented in this paper.