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采用盆栽试验研究了添加生物炭对水稻齐穗期叶绿素荧光参数及产量构成的影响。研究结果表明,水稻齐穗期剑叶叶绿素荧光参数最大光化学量子产量(Fv/Fm)、实际量子产量(Yield)、光化学淬灭(q P)和非光化学淬灭(NPQ)均随着生物炭用量的增加先增后减,以C2F处理叶绿素荧光参数为最高。从产量构成方面分析,C1F处理比对照每穴谷重提高了8%,C3F处理则比对照减少了约15%。说明添加适量生物炭可以提高PSⅡ反应中心的光能转换效率、潜在活性和开放比例,同时对过剩光能的耗散能力的增强,有利于减轻环境胁迫对光合作用的抑制,以增强光合系统反应中心的稳定性,从而改善和提高了作物的光合能力。生物炭对水稻后期光合能力的影响有利于促进水稻灌浆,提高每穗实粒数,使水稻增产。
Pot experiment was conducted to study the effects of biochar addition on chlorophyll fluorescence parameters and yield components at heading stage. The results showed that the maximum photochemical quantum yield (Fv / Fm), actual yield, photochemical quenching (qP) and non-photochemical quenching (NPQ) of flag leaf chlorophyll fluorescence at heading stage were all increased with the increase of biochar The increase of the amount of the first increase and then decrease to C2F chlorophyll fluorescence parameters for the highest. In terms of yield composition, C1F treatment increased 8% per hole weight compared to the control and C3F treatment decreased about 15% compared with the control. The results showed that the addition of appropriate amount of biochar could increase the conversion efficiency, potential activity and open ratio of PSⅡ reaction center, and increase the dissipation capacity of surplus light energy, which is helpful to reduce the inhibition of photosynthesis by environmental stress and enhance the response of photosynthesis system Center stability, thus improving and enhancing photosynthetic capacity of crops. The effect of biochar on photosynthetic capacity in late stage of rice is helpful to promote rice grain filling, increase the number of grains per panicle and increase the yield of rice.