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草业学报  2015 

施锂对罗布麻生长及叶绿素荧光参数的影响

DOI: 10.11686/cyxb20150111, PP. 81-87

Keywords: 罗布麻,,叶绿素荧光

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Abstract:

罗布麻对锂具有一定的富集作用,锂对于罗布麻生长可能有益。本文采用沙培试验方法,研究了根施及叶面喷施方式下不同锂浓度处理对一年生罗布麻生长、叶绿素含量及其荧光特性的影响。结果表明,无论叶面喷施或根施,不同锂浓度处理对一年生罗布麻生长状况均表现出较为明显的影响,在一定浓度范围(010mg/kg)内,随着锂浓度的增加,叶绿素荧光参数(包括Fv/Fm、Fv/Fo、Ψo、φEo、PIABS、叶绿素含量、叶绿素a/叶绿素b值、Sm)、罗布麻生长量、株高、茎粗及主叶对数和侧枝数等均有所增加,说明适宜的锂供应有利于罗布麻的生长。但随着供应浓度的进一步提高,各项生长及荧光指标呈降低趋势,因此过量的锂供应会抑制罗布麻生长,而且有益与有害之间的范围很小,在实际罗布麻栽培中要严格控制锂施用量。

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