Sand culture experiment, electron microscopy technique were used to investigate the compound effects of nitrogen and zinc on nodule development and ultrastructure of white clover.
采用砂培试验和电子显微技术，研究了不同水平氮锌配施对白三叶草根瘤发育和超显微结构的影响。
The affects of Photosynthetic bacteria on burgeon of tomato through sand culture method on pigment, enzyme system of tomato and soil microbe through pot culture experiment were studied.
采用砂培方法研究了光合细菌对番茄发芽的影响和采用盆栽试验研究了光合细菌对番茄生长过程中光合色素、部分抗氧化酶以及微生物区系的影响。
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