辣椒/玉米间作条件下作物对氮、磷和钾的吸收利用特征研究

摘 要：通过辣椒/玉米间作田间试验，研究辣椒/玉米间作条件下，作物对氮、磷和钾的吸收利用特征。结果表明：（1）间作辣椒第1行土壤碱解N和速效P低于单作，间作辣椒中间行碱解N、速效P和速效K含量与单作接近；（2）间作辣椒第1行叶片含N、P量低于单作辣椒，间作3、5行辣椒叶片含N、P量显著高于辣椒单作，从第1行到第5行逐渐增加。间作辣椒叶片含K量在前期低于单作辣椒，后期则高于辣椒单作；（3）间作玉米含N量高于单作玉米。前期间作玉米叶片P、K含量与单作玉米前期接近，后期低于单作；（4）辣椒/玉米间作条件下，辣椒和玉米的产量显著高于单作时的产量。关键词：辣椒；玉米；间作；氮；磷；钾

Research on Uptake and Utilization Characteristics of N, P and K in Chili pepper/Maize Intercropping System

Abstract: Field experiments were conducted in order to understand uptake and utilization characteristics of N, P and K of crops in chili pepper/maize intercropping system in chili pepper main production area of Qiubei County, Yunnan Province in 2006. The results showed that: (1) Contents of available N and available P in soil of intercropped marginal chili pepper line were lower than in soil of monoculture system. Contents of available N, P and K in soil of intercropped middle chili pepper lines were similar with in soil of monoculture system. (2) Contents of N and P in chili leaves of intercropped marginal chili pepper line were lower than in chili leaves of monoculture system. Contents of N and P in chili leaves of intercropped middle chili pepper lines were higher than in chili leaves of monoculture system. Contents of N and P in chili leaves increased from marginal chili pepper line to middle chili pepper lines. Contents of K in intercropped chili leaves were lower than in chili leaves of monoculture system during before harvest and higher than in chili leaves of monoculture system in harvest stage. (3) Contents of N in maize leaves in intercropping system were higher than in monoculture system. Contents of P and K in intercropping system were similar with in monoculture system before harvest and lower than in monoculture system in the harvest stage. (4) Yield and biomass of chili and maize in intercropping system were higher than in monoculture system. Keywords: Chili pepper; Maize; Intercropping system; Nitrogen; Phosphorus; Potassium;