育苗基质中的氮素营养状况对移栽玉米生长发育和产量的影响

Maize Growth and Yield as Affected by Nitrogen Level in Nursery Stage

玉米育苗移栽田间试验结果表明:育苗基质中的氮素营养水平对移栽玉米的生长发育有着深刻的影响。在每kg育苗土壤中加入氮素营养0mg或者300mg皆不利于移栽玉米的大田生长。这与移栽时幼苗体内的氮、磷营养状况有着极为密切的关系。在每kg育苗基质中加入150mg氮素培养下的玉米移栽苗可以获得较好的氮、磷营养状况,并在后期形成较高的干物质积累和产量。试验结果表明,玉米育苗基质中的氮素供应以中等水平为宜。

Field experiment was conducted to determine the effects of nitrogen level in nursery stage on growth, development and yield of transplanting maize. Three levels of nitrogen,0,150,300?mg N were added into the soil of one kilogram respectively. Results showed that nitrogen level in nursery stage had significant effects on growth and yield of transplanting maize. Short period of growth, lower biomass and yield of transplanting maize were observed with 0 mg N/kg soil treatment, while 150?mg N/kg soil treatment resulted in best performance in growth and yield as it had an optimal nutritional status of seedlings. It suggested that 150?mg N/kg soil in nursery stage is a suitable level for maize transplanting seedlings.