Phosphorus Adsorption and Phosphorus Use Efficiency in Calcareous Alkaline Soils Influenced by Humic Acid
Journal Title: International Journal of Plant & Soil Science - Year 2016, Vol 12, Issue 1
Abstract
The effect of lignitic coal derived humic acid (HA) was evaluated on phosphorus adsorption and desorption capacity in calcareous alkaline soils collected from Research Farm of the University of Agriculture, Peshawar, Pakistan. The P adsorption capacity was determined by adding 0, 10, 20, 40, 60, 120, 240 and 360 mg P L-1 (initially P applied, IPA) to 5 g soil with absence (alone P) or presences of 0.15% HA (P+HA) solution in duplicate. The mixture was shaken on horizontal shaker for 30 h continuously followed by 5 min centrifugation at 2500 rpm to collect the aliquot/supernatant. The soils were then added 45 mL distilled water followed by same shaking and centrifugation for desorption studies. The P+HA treatments yielded significantly higher EPC (equilibrium phosphorus concentration) and lower P adsorption (x/m) at each level of IPA than alone P rendering that HA reduced the P adsorption. The P adsorbed (x/m) expressed in percent of IPA (Xad) and the ratio of x/m to ECP (Kd) simply decreased with each increments of IPA in case of alone P but first increased and then decreased in case of P+HA indicating different behavior of P in presences of HA solution. The higher Xad and Kd in case of alone P revealed its comparatively higher affinity and more adsorption of P at any levels of IPA than the soil which received HA treatments. Similarly, the P+HA treated soils produced comparatively higher desorption of P at any IPA than the alone P treated soils suggesting that HA not only reduces the adsorption but can also increase their release from the soil surfaces into solution. The alone P was best fit to Langmuir modified two surface model whereas the P+HA was best fit to Freundlich isotherm models. These results indicated that humic acid application can improve the P use efficiency in field condition through changings in dynamics of P sorption and hence should be applied for better crop nutrient management.
Authors and Affiliations
Muhammad Numan Khan, Dost Muhammad, Sajjad Raza, Abdul Haseeb, Mubasher Nasir, Asad Shah, Farmanullah Khan, Tanveer Ali
Keywords
Related Articles
- EP ID EP351425
- DOI 10.9734/IJPSS/2016/25805
- Views 90
- Downloads 0
Genotypic Variation in Physiological Quality of Fresh Cotton Seed
Quality seed is essential to increase cotton production in Bangladesh. For this, 43 cotton genotypes were evaluated to identify better inherent physiological seed quality. The experiment was set up at the Seed Science an...
Influence of Sulphur and Zinc Levels on Growth, Yield and Quality of Soybean (Glycine max L.)
Field experiments were conducted during kharif 2014 and 2015 to study the influences of sulphur and zinc levels on growth, yield and quality of soybean. The experiment comprised five sulphur levels viz. (S0- control, S1-...
Nutrient Release Patterns of Tithonia Compost and Poultry Manure in Three Dominant Soils in the Southern Guinea Savanna, Nigeria
Aim: Incubation experiment was conducted to determine nutrient release patterns of tithonia compost and poultry manure in three dominant soils in the southern Guinea savanna, Nigeria. Study Design: Complete randomized d...
Yield and Yield Components of Winter Cotton (Gossypium hirsutum L.) Genotypes Influenced by Plant Spacings
Field experiment was conducted to study the influence of plant spacings on the seed cotton yield and yield components in cotton during winter 2016–2017 at Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India...
Allelopathic Root Leachate Effects of Lolium multiflorum x L. perenne on Crops and the Concomitant Changes in Metabolic Potential of the Soil Microbial Community as Indicated by the Biolog Ecoplate™
Plant roots serve a multitude of functions including anchorage, provision of nutrients and water, as well as production of exudates with growth regulatory properties. Some root exudate components may act as allelochemica...