Influence of Topping and Leaf-picking to Male Plant Growth and Development of Seabuckthorn

打顶和摘叶对沙棘雄 株生长发育的影响

The results of 15N isotopic tracer show that different application methods directly affect mineralization of organic nitrogen of field soil after topping of tobacco plant and nitrogen accumulation in tobacco plant .

3.15N同位素示踪结果表明，不同施肥措对施烟 株 打顶后田间土壤有机氮的矿化和烟株体内的氮素累积有直接影响。

The quantity of rhizosphere soil microorganisms of tobacco plant applied with chemical fertilizer was markedly high in topping stage to result in maturity retarding of tobacco plant because of high quantity of mineralized nitrogen of rhizosphere soil of tobacco plant in later stage . 2 .

而施用化肥能明显提高烟株 打顶时根际土壤微生物的数量，导致烟株根际土壤后期氮素矿化数量较多而延缓烟 株成熟。

Presents measures for deep topping of vacuum distillation plant ( I ) in Tianjin Branch Co.

介绍了天津分公司常减压（I） 装置减压深 拔所采取的措施。

Topping make the root volume and gross absorption area and active absorption area and ratio face area of the ramie low-branch seedling large and increase its accumulation of soluble protein in root of individual plant and promote its reducing power of root .

打顶使得苎麻低位分枝扦插苗的根系体积及其总吸收面积、活跃吸收面积，比表面积增大， 单株根系中可溶性蛋白积累量增多，根系活力增强。