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不同成熟时期烟草种子营养元素含量变化
作者: 郑昀晔1  2  古 吉2  马文广1  2 *  
单位: (1 云南省烟草农业科学研究院  昆明 650021;2 玉溪中烟种子有限责任公司  云南 玉溪 653100)  
关键词: 烟草种子  成熟时期  N  P  K  Na  含量  
分类号:S572.01
出版年,卷(期):页码:2016 ,47 ( 1 ): 页码:43-47
摘要:

【目的】研究不同成熟时期烟草种子营养元素含量的变化规律,为烟草种子田间繁种及生产管理提供理论依据。【方法】以MS云烟87、云烟97、MSK326和红花大金元不同成熟时期的种子为试验材料,测定其N、P、K和Na元素含量。【结果】4个烟草品种种子中N、P和K元素含量均在成熟初期(第7 d)最高,显著高于其他成熟时期种子的N、P和K元素含量(P<0.05)。MS云烟87种子中N、P、K元素含量最低值出现在种子成熟中期;Na元素含量最低值出现在种子成熟前期。云烟97种子成熟前期大量利用N、Na元素,中后期N、Na元素含量趋于稳定;整个成熟期P元素含量呈“降低—升高—降低—升高”的波动变化趋势;K元素含量先下降后上升,最低值出现在种子成熟中期。MSK326种子成熟前期大量利用N元素,中后期N元素含量趋于稳定;P元素含量前中期呈“降低—升高—降低”的变化趋势,后期趋于稳定;K元素含量先降低后升高,种子成熟中期达最低值;Na元素含量变化较大,中期出现积累高峰,后期处于较低水平。红花大金元种子在成熟前期大量消耗N、Na元素,两者含量下降后趋于稳定;P、K元素含量先降低后升高,均在种子成熟中期达最低值。【结论】不同烟草品种种子成熟过程中对营养元素的吸收利用存在差异,整体上表现为前至中期对N、P、K、Na元素的吸收利用量较大,中至后期各元素含量趋于平稳或有所回升。

【Objective】The change law of nutritive element content in tobacco seed at different mature stages was investigated, in order to theoretical basis for tobacco seed breeding and field management. 【Method】Tobacco seeds of MS Yunyan 87, Yunyan 97, MS K326, and Honghua Dajinyuan at different mature stages were collected to determine contents of nutritive elements(N, P, K and Na). 【Result】The results showed that, N, P and K contents in seeds of 4 tobacco varieties reached up to maximum at early mature stage(the 7th day), which were significantly higher than those at other mature stages(P<0.05). As for MS Yunyan 87 seeds, the N, P, and K contents were found to be minimum at middle mature stage, and Na content were also found to be minimum at early mature stage. As for Yunyan 97 seeds, N and Na were consumed heavily at early mature stage, and N and Na contents tended to be stable at the following mature stages, moreover, P content showed decrease-increase-decrease-increase tendency during whole mature period, and K content increased at first and then decreased, which was found to be minimum at middle mature stage. As for MS K326 seeds, N was consumed heavily at early mature stage, N content in seed trended to be stable in the following mature stages; P content showed decrease-increase-decrease tendency in early-middle stage, which trended to be stable at later mature stage; K content decreased firstly and then increased, which was found to be minimum at middle mature stage; Na content changed greatly, which was accumulated to be maximum at middle mature stage, and reduced to low level at later mature stage. As for Honghua Dajinyuan seeds, N and Na were consumed heavily at early mature stage, and N and Na contents decreased firstly and then trended to be stable, while the P and K contents decreased firstly and then increased, which were found to be minimum at middle mature stage. 【Conclusion】There are some differences in the uptake and utilization of nutritive element in seed during mature period between tobacco varieties. Furthermore, N, P, K and Na are absorbed and utilized heavily at early-middle mature stage of tobacco seed, while their contents trend to be stable or slightly rebound in middle-later stage.

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