留数条件 residue condition
- 烤烟生长发育后期,同一留叶数条件下,叶片NR活性、根系活力随着施氮量的增加呈先升高后降低的趋势;
In the late stage of flue-cured tobacco growth, under the same level of leaf number, leaf NR activity and root activity increased and then decreased with the increase of nitrogen application.
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