[J].HEILONGJIANG AGRICULTURAL SCIENCES,2020,(09):14-19.[doi:10.11942/j.issn1002-2767.2020.09.0014]
肥密互作对大豆光合作用的调控研究
- 文献标志码:
- A
- 摘要:
- 为研究肥密因素对大豆光合特性的调控作用,本研究以中龙豆1号为研究对象,设置施氮量和密度各4个处理,研究肥密互作条件下大豆光合特性及叶绿素含量的响应。结果表明:R1~R5期,光合特性呈先升高后降低的单峰曲线变化规律,在R4期光合速率最高;叶绿素含量从R1~R5期呈现上升的趋势,R5期最高。各肥料处理间的光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)及叶绿素含量(SPAD值)均表现为F2>F1>F3>F0;胞间CO2浓度(Ci)表现为F0>F4>F2>F3。各密度处理间的光合速率(Pn)、气孔导度(Gs)和蒸腾速率(E)表现为D3>D2>D1>D4;胞间CO2浓度(Ci)表现为D1>D4>D2>D3;叶绿素含量(SPAD值)均表现为D1>D2>D3>D4。肥密因素对光合特性起到了一定的调控作用,本研究中,在F2D3处理(施氮150 kg?hm-2,密度32万株?hm-2)下大豆冠层分布最合理,有利于光合作用的提高。
参考文献/References:
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备注/Memo
收稿日期:2020-04-24