不同栽培方式及氮肥施用水平下春玉米养分累积特征

Characteristics of Nutrient Accumulation for Spring Maize under Different Cultivation and Nitrogen Fertilizer Treatments

对不同栽培方式及氮肥施用水平下春玉米植株氮、磷、钾的累积特征及差异比较分析,结果表明,氮肥增产效果显著,高产栽培方式下产量增加主要来自收获穗数的增加。高产栽培方式下玉米秸秆和子粒中氮、磷、钾含量均显著提高,但各自所占百分比变幅较小。与习惯栽培方式相比,高产栽培方式玉米植株体内氮素利用效率提高15.0%～30.5%,促进了植株对氮素的吸收。

To study the characteristic of nitrogen, phosphorous, potassium accumulation and dillerence oi nutrient accumulation between nitrogen levels in spring maize under two cultivation patterns with different nitrogen application treatments. The results showed that nitrogen fertilizer application increased significantly grain yield. The increase of harvest ear number contributed mainly to high yield. The nitrogen, phosphorous, potassium accumulations of straw and grain in maize were increased significantly with few variations between treatments, at the average of 5.1%. High yield cultivation pattern improved nitrogen accumulation of plant and the nitrogen recovery efficiency was increased 15.0%- 30.5% compared with that of traditional cultivation pattern.