Potassium fixation of different soil types and nutrient levels

Sárdi, Katalin; Csitári, Gábor

doi:10.1080/00103629809370074

Cited by 22 publications

(7 citation statements)

References 6 publications

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“…Several factors control potassium fixation in soils, and among them it is the K fertiliser dose over a long period of time (Sardi and Csitari 1998). We found the highest K fixation capacity in the control that did not receive K fertiliser for about 40 years and the lowest in the treatment with the high continuous K application rate (Figure 4).…”

Section: Resultsmentioning

confidence: 63%

Potassium dynamics in the soil and yield formation in a long-term field experiment

Scherer¹,

Goldbach²,

Clemens³

2003

PLANT SOIL ENVIRON

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The influence of an interrupted K fertilisation on different K fractions of the soil, yield formation and K uptake by different crops was investigated in a long-term field experiment on Luvisol derived from loess. Irrespective of the previous K fertilisation, the interruption of K fertilisation resulted in a sharp decline of CAL extractable K. K concentration in the saturation extract as well as HCl extractable K were reduced while K fixation capacity increased within 10 years after omitting K. Omitting K fertilisation decreased yields of sugar beet and potatoes while cereals were not affected, although K uptake of all crops reacted to the differentiated K supply to a different extent.

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Section: Resultsmentioning

confidence: 63%

Potassium dynamics in the soil and yield formation in a long-term field experiment

Scherer¹,

Goldbach²,

Clemens³

2003

PLANT SOIL ENVIRON

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“…Past studies indicated amount and type of clay as the dominant factor affecting the availability and supply of K in soil as observed for indigenous soil supply of potassium (S K ) in the NGS. Fixation of K is larger in clayey than in sandy textured soils, and K fixation is largest in vermiculites and mica-clay minerals and smallest in montmorillonites and kaolinites (Sardi and Csitari, 1998; Conti et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

Balanced nutrient requirements for maize in the Northern Nigerian Savanna: Parameterization and validation of QUEFTS model

Shehu

Lawan

Jibrin

et al. 2019

Preprint

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19Establishing balanced nutrient requirements for maize (Zea mays L.) in the Northern Nigerian 20 Savanna is paramount to develop site-specific fertilizer recommendations to increase maize 21 yield, profits of farmers and avoid negative environmental impacts of fertilizer use. The model 22 QUEFTS (QUantitative Evaluation of Fertility of Tropical Soils) was used to estimate balanced 23 nitrogen (N), phosphorus (P) and potassium (K) requirements for maize production in the 24 Northern Nigerian Savanna. Data from on-farm nutrient omission trials conducted in 2015 and 25 2016 rainy seasons in two agro-ecological zones in the Northern Nigerian Savanna (i.e. 26 Northern Guinea Savanna "NGS" and Sudan Savanna "SS") were used to parameterize and 27 validate the QUEFTS model. The relations between indigenous soil N, P, and K supply and 28 soil properties were not well described with the QUEFTS default equations and consequently 29 new and better fitting equations were derived. The average fertilizer recovery fractions of N, P 30 and K in the NGS were generally comparable with the QUEFTS default values, but lower 31 recovery fractions of these nutrients were observed in the SS. The parameters of maximum 32 accumulation (a) and dilution (d) in kg grain per kg nutrient for the QUEFTS model obtained 33 were respectively 35 and 79 for N, 200 and 527 for P and 25 and 117 for K in the NGS zone 34 and 32 and 79 for N, 164 and 528 for P and 24 and 136 for K in the SS zone. The model 35 predicted a linear relationship between grain yield and above-ground nutrient uptake until yield 36reached about 50 to 60% of the yield potential. When the yield target reached 60% of the 37 potential yield (i.e. 6.0 tonnes per hectare), the model showed above-ground nutrient uptake of 38 2 19.4, 3.3 and 23.0 kg N, P, and K, respectively, per one tonne of maize grain in the NGS, and 39 17.3, 5.3 and 26.2 kg N, P and K, respectively, per one tonne of maize grain in the SS. These 40 results suggest an average NPK ratio in the plant dry matter of about 5.9:1:7.0 for maize in the 41 NGS and 3.3:1:4.9 for maize in the SS. There was a close agreement between observed and 42 parameterized QUEFTS predicted yields across the two agro-ecological zones (R 2 = 0.70 for 43 the NGS and 0.86 for the SS). We concluded that the QUEFTS model can be used for balanced 44 nutrient requirement estimations and development of site-specific fertilizer recommendations 45 for maize intensification in the Northern Nigerian Savanna.46

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“…Exchangeable K, however, also increases as a result of K application. A considerable percentage of fertilizer-K may also be bound in the K-fixing clay minerals (Sárdi and Csitári, 1998). There was one order of magnitude difference between exchangeable K and Mg contents, and another order of magnitude between exchangeable Mg and Ca values (Figure 1).…”

Section: Discussionmentioning

confidence: 97%

Data presentation, interpretation, and communication

Csathó

Debreczeni

Sárdi

2000

Communications in Soil Science and Plant Analysis

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K, Ca and Mg concentrations in tillering stage winter wheat (Triticum aestivum L.) shoot, as well as acidic (pH 4.65) ammonium-acetate + EDTA -soluble (LE-, Lakanen and Erviö, 1971) and neutral ammonium acetate-exchangeable (Wanasuria et al., 1981) soil K, Ca and Mg contents were determined for a network of 28-year-old National Long-term Fertilization Trials (NLFT) with different K fertilization rates at eight experimental sites representing various agroecological and soil conditions of Hungary. All the sites had the same fertilization pattern. Correlation between the two soil Ca and the two soil Mg methods, between soil and shoot Ca, and Mg, as well as between shoot K and shoot Ca+Mg contents were evaluated. Close, linear correlations were found between NH 4 OAc-Ca and LE-Ca and between NH 4 OAc-Mg and LE-Mg on non-calcareous soils (r = 0.95). Acidic LE-extractant dissolved significant amounts of Ca and Mg from the Ca-and Mg-carbonates in the calcareous soils. Neutral NH 4 OAc-Ca values increased with increasing soil calcium carbonate contents. Neutral NH 4 OAc-Mg values, however, were the lowest in the calcareous soils, probably due to the large quantities of Ca 2+ more strongly adsorbed to the cation exchange sites of the colloids compared to Mg 2+ . Exchangeable K + values were also small in the calcareous soils, although all of the soils were loams with medium clay contents. There was a positive logarithmic correlation between soil LECa and shoot Ca (R = 0.55), and a quadratic polynomial one between soil LE-Mg and shoot Mg contents, resp. (R = 0.45). The positive logarithmic correlation between NH 4 OAc-Ca and shoot Ca was even closer (R = 0.60). However, there was no correlation between NH 4 OAc-Mg and shoot Mg values. A close negative, logarithmic correlation was found between wheat shoot K contents and Ca + Mg contents (R = 0.78).

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Potassium fixation of different soil types and nutrient levels

Cited by 22 publications

References 6 publications

Potassium dynamics in the soil and yield formation in a long-term field experiment

Potassium dynamics in the soil and yield formation in a long-term field experiment

Balanced nutrient requirements for maize in the Northern Nigerian Savanna: Parameterization and validation of QUEFTS model

Data presentation, interpretation, and communication

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