不同辣椒品种混种根系互作对产量及根际氮转化的影响

以不同辣椒品种薄皮椒（Capsicum annuum）、线椒（Capsicum frutescens）为试验材料，采用盆栽方式，通过分析同种种植或混种（交叉及同行）模式下两种辣椒的产量、生物量、氮素积累量及根际土中氮形态和含量的变化，探究同种或混种辣椒根系互作对氮吸收积累的影响。结果表明，两种辣椒混合种植的果期茎叶干物质量、产量及果实氮积累量均高于同种种植，其中果期茎叶干物质量、产量及果实氮积累量平均增加26.67%、63.65%、15.08%；且同行种植的产量及果实氮积累量均为最高，但果期不同处理之间的根系干物质量无显著差异。果期时混种种植辣椒的铵硝比显著低于同种种植，平均降低67.39%。通过两种辣椒混合种植，特别是同行种植，能够达到增加产量、提高氮素积累量的目的，在实际的生产中具有一定的可行性和推广前景。

Effects of Root Interaction of Interplanted Different Pepper Varieties on Yield and Rhizosphere Nitrogen Transformation

In this paper, the varieties of thin-bark pepper (Capsicum annuum) and line pepper (Capsicum frutescens) were used as the experimental materials, and a pot experiment was conducted in order to explore the effects of root interaction between the same and different pepper varieties on nitrogen (N) uptake and accumulation by analyzing the yield, biomass, nitrogen accumulation of pepper, as well as nitrogen form and content changes in rhizosphere soils under individual or interplanting (cross and parallel) planting modes. The results showed that the dry weights of stems and leaves, pepper yield and fruit N accumulation were higher in the interplanting mode than those of the two individual planting modes, which were meanly increased by 26.67%, 63.65% and 15.08% at fruit stage, respectively. In addition, the pepper yield and fruit N accumulation of parallel planting were the highest, but there was no significant difference in root dry weights among different planting modes at fruit stage. At fruit stage, rhizosphere ammonium/nitrate ratio in interplanting mode was significantly lower than those of the individual planting modes, meanly decreased by 67.39%. Interplanting mode of pepper, especially parallel planting could increase the pepper yield and improve N accumulation, which has a certain feasibility and promotion prospect in the actual vegetable production.