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首页> 外文期刊>Fruit, Vegetable and Cereal Science and Biotechnology >Effects of Foliar Application of Humic Acid and Gibberellic Acid on Mist-Rooted Olive Cuttings
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Effects of Foliar Application of Humic Acid and Gibberellic Acid on Mist-Rooted Olive Cuttings

机译：叶面腐殖酸和赤霉素对橄榄根薄切的影响

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摘要

Humic substances, as part of humus-soil organic matter, are compounds arising from the physical, chemical and microbiological transformation (humification) of biomolecules. They are important because they constitute the most ubiquitous source of non-living organic materials that nature knows. In this study, the effect of humic acid (HA) (0, 0.25, 0.5, 1, 2%) and gibberellic acid (GA_3) (0, 200, 400 mg/L), when applied as a leaf spray individually or in combination, were investigated on the vegetativegrowth of mist-rooted olive (Olea europaea cv. 'Zard', a slow-growing cultivar) cuttings. Application of HA at 0.5, 1, or 2% could increase shoot length, elongate internodes and increase the fresh and dry weights of shoots, leaves, and roots. When HA was combined with GA_3, all these morphological parameters increased significantly more than in other treatments. The application of HA and GA_3 had the greatest effect on leaf surface area although the chlorophyll content decreased in treatments. The incorporation of HA and GA_3 significantly increased the soluble sugars and decreased the starch content relative to controls. The greatest nitrogen content was detected when 400 mg/L GA_3 with 0.5, 1 or 2% HA were applied. The effectiveness of HA might be related to its direct action through a hormone-like activity.
机译：腐殖质是腐殖土有机物的一部分，是生物分子的物理，化学和微生物转化（腐殖化）产生的化合物。它们之所以重要，是因为它们构成了自然界最普遍的无生命有机材料来源。在这项研究中，腐殖酸（HA）（0，0.25，0.5，1，2％）和赤霉素（GA_3）（0，200，400 mg / L）单独或以叶子喷雾剂施用时的效果结合，研究了根薄薄薄的橄榄（Olea europaea cv。“ Zard”，一种生长缓慢的品种）的营养生长。以0.5％，1％或2％的含量施用HA可以增加枝条长度，延长节间，并增加枝条，叶片和根的新鲜和干燥重量。当HA与GA_3结合使用时，所有这些形态学参数的增加均明显超过其他治疗方法。尽管叶绿素含量降低，但施用HA和GA_3对叶片表面积的影响最大。相对于对照，HA和GA_3的掺入显着增加了可溶性糖并降低了淀粉含量。当使用含0.5％，1％或2％HA的400 mg / L GA_3时，检测到最大的氮含量。 HA的有效性可能与其通过激素样活性的直接作用有关。

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