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通过隔根消除玉米Ⅱ花生间作地下种间作用,研究了地上、地下种间作用对玉米Ⅱ花生间作优势和功能叶片光合特性的影响,分析了地上、地下种间效应的贡献。结果表明,与不隔根相比,隔根间作体系的土地当量比(LER)降低10.34%~12.30%,地上、地下种间作用的贡献率分别为24.62%~33.49%和66.51%~75.38%。与不隔根相比,隔根间作玉米的净光合速率(Pn)、光饱和点(LSP)、光饱和时最大净光合速率(LSP_n)、羧化效率(CE)、Rubisco最大羧化速率(V_(cmax))、最大电子传递速率(J_(max))和磷酸丙糖利用速率(TPU)明显降低,隔根间作花生的Pn、光系统II的实际光化学效率(Φ_(PSII))、表观量子效率(AQY)、LCP、LSP和LSP_n也明显降低;地上、地下种间作用对间作玉米Pn、LSP、LSP_n、CE、V_(cmax)、J_(max)和TPU的贡献为正效应,对间作花生Φ_(PSII)和AQY的贡献为正效应,地下种间作用对间作花生Pn、LCP、LSP和LSP_n的贡献为正效应,地下种间作用则为负效应。可见,玉米Ⅱ花生间作优势来源于地上、地下种间作用,对间作玉米贡献均为正效应,对间作花生地上为负效应,地下为正效应。
The effect of subsurface interaction on the photosynthetic characteristics of functional and functional leaves of intercropped corn and peanut Ⅱ was studied. The contribution of above-ground and underground interspecific effects was analyzed. The results showed that the LER decreased by 10.34% -12.30% and the contribution rate of above-ground and below-ground species interaction was 24.62% -33.49% and 66.51% -75.38%, respectively. . The net photosynthetic rate (Pn), light saturation point (LSP), maximum net photosynthetic rate (LSP_n), carboxylation efficiency (CE), Rubisco maximum carboxylation rate The maximum electron transfer rate (J max) and the rate of triphosphate utilization (TPU) were significantly reduced. The Pn of peanut and the actual photochemical efficiency (Φ PSII) of photosystem II The AQY, LCP, LSP and LSP_n also decreased significantly. The contribution of above and belowground interspecific interactions was positive for Pn, LSP, LSP_n, CE, Vmax, J max and TPU in intercropping maize. The contribution of ΦII (PSII) and AQY to intercropping was positive, and the contribution of subsurface interaction to Pn, LCP, LSP and LSP_n of intercropping peanut was positive and that of interspecific interaction was negative. It can be seen that the superiority of intercropping of maize Ⅱ peanut comes from the above-ground and below-ground intercropping, and it has a positive effect on the intercropping corn, negative effect on the peanut intercropping, and underground effect.