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首页> 外文期刊>Acta Horticulturae >The response of rose geranium (Pelargonium graveolens L.) to nitrate and ammonium application.
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The response of rose geranium (Pelargonium graveolens L.) to nitrate and ammonium application.

机译：玫瑰天竺葵（天竺葵）对硝酸盐和铵盐的响应。

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The potential to produce good quality rose geranium oil using a hydroponic production system was investigated at the University of the Free State. Four levels of nitrate (8, 10, 12 and 14 meq L-1) and four levels of ammonium (0.00, 0.50, 1.00 and 1.50 meq L-1) were evaluated in two separate trials, using a completely randomized block design with five replications. The results obtained showed a significant effect of nitrate on plant height, number of branches, foliar dry mass, chlorophyll content and oil yield. The height of rose geranium obtained at 8 and 10 meq L-1 nitrate concentrations were 46 and 57 cm, respectively. The number of branches was significantly increased by nitrate application and 57 branches were produced at 10 meq L-1 compared to the 47 branches produced at 8 meq L-1 nitrate concentration. The best foliar dry mass of 10 t ha-1 was also produced at the nitrate concentrations of 10 meq L-1 compared to the 4 t ha-1 produced at 8 meq L-1. However, chlorophyll content at 12 meq L-1 nitrate concentration was significantly higher than that obtained at 8 meq L-1. The greatest oil yield (145 kg ha-1) was found at 10 meq L-1 although the citronellol:geraniol ratio was slightly higher than the upper limit required for good oil quality. However, the geraniol and citronellyl formate contents were within the range for top oil quality. Plant height, foliar dry mass, oil yield and chlorophyll content were not significantly affected by ammonium concentrations, but the content of sulphate and nitrogen increased linearly with increasing ammonium concentration.
机译：自由州大学研究了使用水培生产系统生产优质玫瑰香叶天竺葵油的潜力。四个水平的硝酸盐（8、10、12和14 meq L -1 ）和四个水平的铵（0.00、0.50、1.00和1.50 meq L -1 ）在两个单独的试验中使用五次重复的完全随机区组设计进行评估。获得的结果表明硝酸盐对株高，枝条数，叶干重，叶绿素含量和油产量有显着影响。在8和10 meq L -1 硝酸盐浓度下获得的玫瑰天竺葵的高度分别为46和57 cm。硝酸盐的施用显着增加了支链的数量，在10meq L -1 产生了57个分支，而在8meq L -1 硝酸盐浓度下产生了47个分支。在硝酸盐浓度为10 meq L -1 的情况下，与4 t ha -1 相比，最佳叶面干质量为10 t ha -1 。 / sup>以8 m​​eq L -1 产生。然而，硝酸盐浓度为12 meq L -1 的叶绿素含量明显高于8 meq L -1 。尽管香茅醇：香叶醇的比例略高于优质油所需的上限，但在10 meq L -1 时发现最大的油产量（145 kg ha -1 ）质量。但是，香叶醇和香茅酚甲酸酯的含量在最高油品质的范围内。铵浓度对株高，叶干重，油产量和叶绿素含量没有显着影响，但硫酸盐和氮的含量随铵浓度的增加而线性增加。

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