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为探究大豆和甘薯的根系分泌物对玉米生长及产量的影响,通过盆栽根系分泌物吸附试验,研究了不同活性炭处理方式对玉米/大豆(B1)、玉米/甘薯(B2)及玉米净作(B3)3种种植模式下玉米光合特性、荧光参数及生物产量的变化规律。结果表明:加活性炭处理(A1)较未加活性炭处理(A2)抑制了玉米生长,但玉米产量差异不显著。加活性炭时,由于根系分泌物被吸附,玉米的光合速率、荧光参数和产量在各种植模式之间差异不显著;未加活性炭时,大豆的根系分泌物促进玉米生长和提高玉米产量,甘薯的根系分泌物抑制玉米生长和降低玉米产量,B1处理下玉米的根干重、根系活力、净光合速率和子粒干重比B3处理分别高15.81%、53.20%、19.94%和60.84%,而B2处理则比B3处理分别低19.92%、4.33%、16.96%和24.32%。
In order to explore the effects of root exudates of soybean and sweet potato on the growth and yield of maize, the effect of different activated carbon treatments on the growth of maize (Zea mays L.), soybean (B2) B3) Changes of photosynthetic characteristics, fluorescence parameters and biomass of maize under three cropping patterns. The results showed that the addition of activated carbon (A1) inhibited the growth of maize compared with no activated carbon treatment (A2), but the difference was not significant. With activated carbon, the root exudates were adsorbed, photosynthetic rate, fluorescence parameters and yield of maize showed no significant difference among different planting modes. When no activated carbon was added, the root exudates of soybean promoted the growth of maize and increased the yield of maize. Root exudates inhibited maize growth and decreased maize yield. Root dry weight, root activity, net photosynthetic rate and dry weight of maize were higher than B1 by 15.81%, 53.20%, 19.94% and 60.84%, respectively, Were 19.92%, 4.33%, 16.96% and 24.32% lower than the B3 treatment respectively.