论文部分内容阅读
将甘蓝植株分别种在含有5、50和500ppmNO_(3-)N的营养液中,在开始结球时用不同的打叶方式将外叶打去,研究氮的供应和落叶对叶球发育的影响。植株的生长和叶球重。收获时各处理的植株干重明显不同。各器官(根、茎、外叶、叶球等)的干重和对照相比,在5～50ppm N时大大增加。在500ppm N时比50ppm有所减少。在5ppm N时,在植株上观察到缺氮的症状。叶色变红,根变细长。三种处理的叶球重呈50>500>5ppm N的关系。
The cabbage plants were planted in nutrient solution containing 5, 50 and 500ppm NO_ (3-) N, respectively. At the beginning of the cocooning, the outer leaves were beaten with different ways of leafblocking to study the effects of nitrogen supply and deciduous leaf development on leaf development influences. Plant growth and leaf weight. The dry weight of the plants treated at harvest was significantly different. The dry weight of each organ (roots, stems, outer leaves, lobes, etc.) increased significantly at 5 to 50 ppm N compared to the control. Reduced from 50ppm at 500ppm N. At 5 ppm N, the symptoms of nitrogen deficiency were observed on the plants. Leaf color turns red, the root becomes slender. The leaf weights of the three treatments showed a relationship of 50> 500> 5 ppm N.