Humik asitlerin stres altındaki bitkilerin büyümesine ve besleyicilerin alınmasına etkileri I: Tuzluluk

Year 2017, Volume: 29 Issue: 4, 134 - 143, 31.12.2017

Şener Akıncı

https://doi.org/10.7240/marufbd.319900

Abstract

Organik maddeler, karbon grubuna sahip bileşiklerdir ve canlıların
yapısını oluştururlar. Ölen canlıların (detritus) artıklarıdır ve/veya
yerkabuğunun doğal bileşenidir. Humik asitler rengi kahverengiden siyaha
değişen kompleks, değişik sayıda karbon atomu taşıyan humus maddeler olarak
tanımlanır. Sağlıklıverimli, yaşayan bir toprak, milyarlarca mikroskobik yaşam
formlarınının devamlılığı için yeterli karbonu bulundurmalıdır. Humik maddeler
yararlı toprak organizmaları için etkili enerji kaynaklarıdır. Karbon yanında
oksijen, hidrojen, nitrojen ve sülfür içerirler. Humik asitler toprağın su
tutma kapasitesini, katyon ve anyon değişimini arttırması, toprak taneciklerinin
arasında gevşemeyi ve toprak sıcaklığını dengelemesi ile bitki gelişimini
desteklemektedir. Humik asitlerin, susuzluk, tuzluluk ve bazı toksik
elementlerin neden olduğu stres faktörlerine karşı kullanıldığı çok sayıda
araştırma bulunmaktadır. Çalışmanın bu bölümü, humik asitlerin tuz stresi
altındaki bitkilerdeki rollerini belirleyen araştırmaları derleme amaçlıdır. 

Keywords

Bitkiler, Humik asitler, Stres, Tuzluluk, Besleyicilerin alınması

The effects of humic acids on plant growth and nutrients uptake under stress I: Salinity

Abstract

Organic matters are compounds having carbon group and exist in the
structure of organisms. They are residues of detritus and/or natural component
of earth crust. Humic acids are defined that complex matters of humus having
various numbers of carbon atom and its colour changed from brown to black. A
healthy fertile living soil must contain carbon adequately for continuity of billions of microscopic life
forms. Humic substances are effective energy sources for useful soil organisms.
It contains oxygen, hydrogen, nitrogen and sulphur in addition to carbon. Humic
acids support plant growth by increasing soil water retention capacity, cation
and anion exchange, loosing in soil particles interaction and stabilising soil
temperature. There are many reports available that humic acids have been used
against stress factors caused by such as drought, salinity and some toxic
elements. This part of study was aimed to review to determine roles of humic
acids on plants under salinity stress.

Keywords

Plants, Humic acids, Stress, Salinity, Nutritions uptake

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