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不同铜浓度的猪粪对玉米光合特性的影响

Keywords: 猪粪,,光合特性,玉米

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Abstract:

采用盆栽试验研究了不同铜浓度的猪粪对玉米光合特性的影响。试验组猪粪为猪饲喂基础日粮添加铜250mg·kg-1排出的粪,设100、200、300g·盆-13个试验组,对照组猪粪为猪饲喂基础日粮排出的粪,300g·盆-1。移栽3叶期玉米后10、20、30、40d测定玉米叶片的光合作用参数。结果表明,玉米移栽后10d,随着施用猪粪含铜浓度的增大,玉米叶片净光合速率、气孔导度、胞间CO2浓度、蒸腾速率、光合色素含量也随着升高,但随着时间的延长,施用200g·盆-1、300g·盆-1含铜猪粪组玉米叶片净光合速率、胞间CO2浓度、蒸腾速率、光合色素含量显著低于对照组。玉米移栽后期高铜浓度猪粪抑制玉米光合作用参数。

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