玉米魔芋间作条件下作物的氮素养分吸收规律研究*

 采用田间小区试验研究了玉米魔芋间作条件下作物的干物质积累动态、经济产量和氮养分吸收动态变化特点。结果表明，间作对玉米的氮素吸收利用和生物学产量增加有明显的促进作用，间作玉米氮素养分吸收量比相应单作提高12%~50%，生物学产量提高10%~26%；而魔芋的吸氮量比相应单作降低9%~37%，生物学产量降低18%~39%。间作系统的氮养分竞争比率表明，玉米为优势种，竞争能力强于魔芋。

Nitrogen Uptake and Utilization of Plant in Maize and Konjaku Intercropping

Field trials were conducted to investigate the dynamics of accumulation of plant dry matter,nitrogen uptake and utilization,biomass and yield of maize and konjaku under the condition of tow system Intercropping.The results showed that the obvious facilitation maize increased 12%~50% and 10%~26% respectively,compared with those monocroped maize.The nitrogen uptake amount and biomass of intercropped konjaku were 9%~37% and 18%~39% lower than those monocroped konjaku.Maize was the dominant species with more competitive ability as indicate by competition ratio of maize to konjaku.