The Effect of Humic Acid on Nutrient Composition in Broad Bean (Vicia faba L.) Roots

Abstract

Humic acids promote the conversion of mineral nutrients into forms available to plants. It also stimulates seed germination and viability, and its main effect usually being more prominent in the roots. The objective of this study was to determine of the influence of humic acid on broad bean (Vicia faba L.) cultivar ‘Eresen 87’ on root growth and development as well as nutrient uptake, during investigation in a pot experiment. Treatment with leonardite, as humic acid source positively affected both germination and harvesting, enhancing root length and biomass. Humic acid (HA) caused significant increase of fresh (RFW) and dry (RDW) weights by 30.1% and 56.6% of broad bean roots, respectively. Flame photometer and atomic absorption spectrophotometry analyses revealed that K content was major nutrient among the tested elements. Humic acid increased the contents of Na and K significantly. The content of Ca and Fe was not significantly increased whereas Cu, Mn and Zn content decreased under HA treatment.

Effect of humic acid application on accumulation of mineral nutrition and pungency in garlic (Allium sativum L.)

“…The increase was ~1.36 (100 ppm), ~1.88 (200 ppm), ~2.30 (300 ppm) and ~2.77 (400 ppm) fold, respectively. Our results are in agreement with that of Akinci et al (2009), they also reported that the humic acid applications increased calcium concentration in broad been roots, and same was reported in tomato by David et al (1994).…”

“…Our results support that of Akinci et al (2009), who found that the Fe 3+ increased in humic acid treated broad bean roots as compared to the control. In tomato plants grown in green house conditions, applying humic acid increased the Fe 3+ content in its roots (David et al, 1994).…”

“…Therefore, no significant effects could be observed by application of humic acid on the content of copper. However, copper content in Vicia faba L. treated with HA decreased by 27% but did differ significantly from controls (Akinci et al, 2009). Eyheraguibel et al (2008) also found that the Cu 2+ increased significantly in HA treated maize plant roots by 14% as compared to control.…”

“…In our present experiment, with respect to Table 2, it was shown that the concentration of zinc significantly increased in 200 ppm (~1.44 fold) of humic acid application only, while remaining treatments that is, 100, 300 and 400 ppm of humic acid also increased, apparently, though not significantly. However Akinci et al (2009) reported that the zinc content decreased in humic acid treated plants. On the other hand, Zn 2+ with decrease in broad bean root may be related with the Fe 3+ causing the absorption of Zn 2+ and its toxicity (Olsen, 1972).…”

Response of Cabbage Plants (Brassica oleraceae var. capitata L. ) to Fertilization with Chicken Manure, Mineral Nitrogen Fertilizer and Humic Acid

“…Humic acid is a product contains many elements which improve the soil fertility and increase the availability of nutrient elements by holding them on mineral surfaces and, consequently, affect plant growth and yield (Hartwigson and Evans, 2000, Hafez, 2004and Akinci et al, 2009. Nowadays, it is mostly used to eradicate or decrease the negative effects of chemical fertilizers and some other chemicals from the soil (Salman et al, 2005).…”