Kinetics of nonexchangeable‐potassium release and plant response in some calcareous soils

Jalali, Mohsen; Zarabi, Mahboubeh

doi:10.1002/jpln.200521772

Cited by 62 publications

(37 citation statements)

References 24 publications

(33 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Release was rapid during the initial phase for all treatments but it reached a nearly constant rate after 45-75 min. This trend has been previously observed for calcareous soils of southern Iran by Jalali and Zarabi (2006) and Jalali (2005). The Table 4.…”

Section: Resultssupporting

confidence: 83%

Effects of zeolite and vermicompost applications on potassium release from calcareous soils

Najafi‐Ghiri¹

2014

Soil Water Res.

View full text Add to dashboard Cite

Najafi-Ghiri M. (2014): Effects of zeolite and vermicompost applications on potassium release from calcareous soils. Soil & Water Res., 9: 31-37.Zeolite and vermicompost applications to soil may improve K fertility of soils. For this purpose, these materials were added to five representative calcareous soils collected from southern Iran. The treatments included (1) control, (2) 20 g/kg zeolite, (3) 20 g/kg vermicompost, and (4) 20 g/kg vermicompost + zeolite (1:1). The samples were incubated for 90 days, and the concentrations of soluble, exchangeable, and non-exchangeable K and K release rate to 0.01M CaCl 2 during 240 min (16 successive 15 min extractions of soil samples with CaCl 2 solution) were determined. Results indicated that zeolite application increased significantly the concentration of soluble and exchangeable K. Vermicompost application had a positive effect on all forms of K. Cumulative K release was also affected by vermicompost application. Comparison of experimental data to different kinetic models indicated that Elovich, power function, and parabolic diffusion models described well kinetics of K release from all soil samples to 0.01M CaCl 2 . The b values of Elovich equation had significant relationships with NH 4 OAc-and HNO 3 -extractable K. It is recommended that for K fertility management of calcareous soils, organic and inorganic amendments application to soils should be taken into consideration.

show abstract

Section: Resultssupporting

confidence: 83%

Effects of zeolite and vermicompost applications on potassium release from calcareous soils

Najafi‐Ghiri¹

2014

Soil Water Res.

View full text Add to dashboard Cite

show abstract

“…Figure 4A, 4B, and 4C show the correlation between clay contents and total potassium in the soil. The results revealed that more clay contents possessed more K + contents whether fixed or exchangeable (Jalali and Zarabi, 2006). Table 2.…”

Section: Clay Contents and Kmentioning

confidence: 95%

Potassium dynamics in three alluvial soils differing in clay contents

Wakeel¹,

Gul²,

Sanaullah³

2013

Emir. J. Food Agric

View full text Add to dashboard Cite

show abstract

“…The constant a (the intercept value) ranged from 5.01 to 6.92 mg kg −1 in the first-order model, while the range was from 3.76 to 5.69 mg kg −1 in the power model. These ranges were lower than that observed in some Iranian soils (Jalali and Zarabi, 2006;Jalali, 2008). A successful description of K release with power equation in soils (Hosseinpur et al, 2012) and individual soil size fractions (sand, silt and clay) has been reported by Najafi-Ghiri and Jaberi (2013).…”

Section: Modeling Potassium Releasementioning

confidence: 69%

Kinetics of potassium release in sweet potato cropped soils: a case study in the highlands of Papua New Guinea

Rao

2015

Solid Earth

View full text Add to dashboard Cite

Abstract. The present study attempts to employ potassium (K) release parameters to identify soil-quality degradation due to changed land use patterns in sweet potato (Ipomoea batatas (L.) Lam) farms of the highlands of Papua New Guinea. Rapid population increase in the region increased pressure on the land to intensify subsistence production mainly by reducing fallow periods. Such continuous cropping practice coupled with lack of K fertilization practices could lead to a rapid loss of soil fertility and soilresource degradation. The study aims to evaluate the effects of crop intensification on the K-release pattern and identify soil groups vulnerable to K depletion. Soils with widely differing exchangeable and non-exchangeable K contents were sequentially extracted for periods between 1 and 569 h in 0.01 M CaCl 2 , and K-release data were fitted to four mathematical models: first order, power, parabolic diffusion and Elovich equations. Results showed two distinct parts in the K-release curves, and 58-80 % of total K was released to solution phase within 76 h (first five extractions) with 20-42 % K released in the later parts (after 76 h). Soils from older farms that were subjected to intensive and prolonged land use showed significantly (P < 0.05) lower cumulative K-release potential than the farms recently brought to cultivation (new farms). Among the four equations, first-order and power equations best described the K-release pattern; the constant b, an index of K-release rates, ranged from 0.005 to 0.008 mg kg −1 h −1 in the first-order model and was between 0.14 and 0.83 mg kg −1 h −1 in the power model for the soils. In the non-volcanic soils, model constant b values were significantly (P < 0.05) higher than the volcanic soils, thus indicating the vulnerability of volcanic soils to K deficiency. The volcanic soils cropped for several crop cycles need immediate management interventions either through improved fallow management or through mineral fertilizers plus animal manures to sustain productivity.

show abstract

Kinetics of nonexchangeable‐potassium release and plant response in some calcareous soils

Cited by 62 publications

References 24 publications

Effects of zeolite and vermicompost applications on potassium release from calcareous soils

Effects of zeolite and vermicompost applications on potassium release from calcareous soils

Potassium dynamics in three alluvial soils differing in clay contents

Kinetics of potassium release in sweet potato cropped soils: a case study in the highlands of Papua New Guinea

Contact Info

Product

Resources

About