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选用耐密玉米品种郑单958为材料,设置大垄深耕整秆深还田地膜覆盖(12 t/hm2)、大垄深耕无整秆深还田地膜覆盖、无深耕无整秆深还田无膜覆盖(对照)3种处理,研究不同方式对耐密玉米的植株叶片、茎秆氮、磷、钾积累分配的影响。结果表明,植株叶片和茎秆对氮、磷、钾吸收积累,大垄深耕整秆深还田地膜覆盖>大垄深耕无整秆深还田地膜覆盖>对照。大垄深耕整秆深还田地膜覆盖处理与对照相比,玉米拔节期、抽穗期、灌浆期、成熟期植株叶片的氮、磷、钾积累分别增加了4.4%、15%、10%、23%;26%、9.7%、15.4%、19%;18.3%、5.1%、7.1%、9.8%;叶片氮积累增加高于磷和钾。茎秆的氮、磷、钾分别增加了8%、30%、5%、14%;45%、38.5%、40%、25%;12.4%、30.9%、43.8%、34.5%;茎秆磷积累增加高于氮和钾。大垄深耕整秆深还田地膜覆盖突出增加了叶片氮积累和茎秆磷积累。在大垄深耕整秆深还田地膜覆盖处理的玉米生育期间,植株吸收充足的氮、磷、钾养分,植株健壮,促进叶片光合作用,茎秆的抗逆性、抗倒性增强,为子粒形成提供了充足的养分。
Selection of close-tolerant corn variety Zhengdan 958 as the material, set up a large ridge deep plowing whole mulched with plastic film mulching (12 t / hm2) (Control). The effects of different treatments on the accumulation and distribution of nitrogen, phosphorus and potassium in plant leaves and stalks were studied. The results showed that plant leaves and stems had the accumulation and absorption of nitrogen, phosphorus and potassium. Compared with the control, the accumulation of nitrogen, phosphorus and potassium in plant leaves increased by 4.4%, 15%, 10% and 23% at jointing stage, heading stage, filling stage and mature stage respectively 26%, 9.7%, 15.4%, 19%, 18.3%, 5.1%, 7.1% and 9.8% respectively. The nitrogen accumulation in leaves increased more than that of phosphorus and potassium. The nitrogen, phosphorus and potassium of the stalk increased by 8%, 30%, 5%, 14%, 45%, 38.5%, 40%, 25%, 12.4%, 30.9%, 43.8% and 34.5% respectively. Accumulation increased higher than nitrogen and potassium. Large ridge deep tillage straws deep field film mulching significantly increased nitrogen accumulation and stalk phosphorus accumulation. During the growth period of maize with deep ridge and deep straw mulching, the plants absorb enough N, P and K nutrients, and the plants are robust, promote the photosynthesis of leaves, increase the stress resistance and lodging resistance of stems, The formation provides plenty of nutrients.