The Role of Some Humic Acid Products in Reducing of Use Mineral Fertilizers and Improving Soil Properties and Nutrient Uptake

Abstract

A field experiment was carried out during winter season of 2009-2010 firstly to evaluate the effect of some commercial products of humic acid in reducing mineral fertilizer rates, improving some soil properties (bulk density, total porosity, available water, mean weight diameter and soluble ions), plant growth and nutrients uptake by broad bean plant. secondly is trying to reduce the mineral fertilizer application for their dangerous on general health and highly cost of these fertilizer, with improving production of important crops by natural material. The commercial compounds (Leq humus, Hammer, Wesko plus K, K-Promote and Commander) were added to soil by a rate 10 kg fed -1 plus half the general recommendation. The results could be summarized as follows: -The values of soil bulk density decreased as a result of application humic products as compared with the control (mineral fertilization only). -Soil total porosity and values of available water increased due to the treatments used. -The values of mean weight diameter and soluble ions increased due to the treatments. -The values of soil organic matter and available micronutrients increased due to the treatments. -The plant dry matter yield values (straw and seeds) increased with of humic treatments application -The treatments under investigation gave higher percentage values of macro and micronutrients (content and uptake) in straw of broad bean plants as compared to the control.

Effect of Phosphorus Fertilizer Rates and Application Methods of Humic Acid on Productivity and Quality of Sweet Potato

“…In this respect, humic acid has a one of potential benefits for plants, increased water and nutrient holding capacity, enhanced solubility of P, Zn, Fe, Mg and Cu (Bryan and Stark, 2003;Mikkelsen, 2005). Besides, Rizk et al (2010) mentioned that humic substances are recognized as the most chemically active compounds in soils, with cation and anion exchange capacities far exceeding those of clays and help to break up clay and compacted soils. On the other hand, Sarir et al (2006) mentioned that humic coal applied at 2000 g/ha -1 seem to be more conductive for P availability and suppress P fixation either through chelation, acidifying mechanism or microbially induced mineralization process.…”

Effect of Humic Amendment on Selected Hydrophysical Properties of Sandy and Clayey Soils

“…From the plant production perspective, the humic amendment of the soil caused growth stimulation and higher crop productivity in the form of biomass, seeds, and grain yield. The total soil water storage, plant water use efficiency, and nutrient availability from mineral fertilizers increased [31][32][33][34].…”