论文部分内容阅读
施肥深度对冬小麦根系分布及后期衰老影响的根管栽培试验结果表明,施肥深度可改变不同土体中小麦根重及根系活性,较深层次(50～100cm)施肥有利于小麦根长增加和下层土壤中根重及根系活性的提高,同时可增加旗叶叶面积和净光合率,并使小麦根系SOD和POD活性保持较高水平,抑制过氧化产物MDA的产生,延缓根系及旗叶衰老,明显提高小麦产量。施肥过深(150cm)虽能诱导根系下扎,但小麦总根重和产量却均有所下降。
The root canal cultivation experiment on the effect of fertilizer application depth on root distribution and post-senescence of winter wheat showed that the application depth could change the root weight and root activity of wheat in different soil layers. Fertilization at a deeper level (50-100 cm) Root weight and root activity in the soil, but also increase the leaf area and net photosynthetic rate of the flag leaf, and keep the activities of SOD and POD in the wheat roots at a high level, and inhibit the production of the peroxidation product MDA and delay the senescence of the root and flag leaves. Improve wheat production. Fertilization is too deep (150cm) Although the roots can be induced under the bar, but the total wheat root weight and yield have declined.