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水稻根系生物特性与稻田温室气体排放相关性研究

Keywords: 水稻,温室气体,根系,相关性

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Abstract:

通过湖南双季稻区温室气体排放差异的水稻品种田间试验,研究了不同品种温室气体排放与根系特征的相关性。结果表明,早稻分蘖盛期CH4排放通量与根干重、伤流量均呈显著负相关(P<0.05);晚稻CH4排放通量与根伤流量呈极显著负相关(P<0.01);早稻N2O排放通量在分蘖盛期与根伤流量相关性极显著(P<0.01),在齐穗期与根体积、干重、根伤流量均呈极显著负相关(P<0.01);晚稻分蘖盛期,根系干重与体积均与N2O排放通量呈显著正相关(P<0.05);齐穗期,根系体积与N2O排放通量呈显著负相关(P<0.05);早稻分蘖盛期CO2排放通量与根系干重和根伤流量呈显著正相关关系(P<0.05),晚稻齐穗期根系伤流量与CO2排放通量负相关性达到极显著水平(P<0.01)。因此,根系特性是影响水稻温室气体排放的重要因素。

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