The principles of assimilation and accumulation of nitrogen element based on different fertilization levels and planting densities was researched.
研究了不同密度和施肥水平下的水稻氮素吸收和积累的规律。
The experiment was carried out to study the effects of different N and K fertilization levels on growth, development and yield of tomatoes in the greenhouse.
研究了不同的氮钾肥处理下日光温室番茄生长发育和产量的变化情况。
The results show that the different fertilization levels of N, P and K have the remarkable influence on growth quantity, yield of branch and leaf and taxol content of T.
结果表明，不同的氮、磷、钾施用水平对曼地亚红豆杉‘Hicksii’盆栽苗和田间栽培苗的生长量、枝叶产量和紫杉醇含量有显著影响，影响效应从大至小依次为氮、磷、钾。
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