Potassium Fixation and Release Characteristics of Several Normal and K-Exhausted Soils in the Middle and Lower Reaches of the Yangtse River, China

Zhan, Liping; Li, Xiaokun; Lü, Jianwei; Liao, Zhiwen; Ren, Tao; Cong, Rihuan

doi:10.1080/00103624.2014.954719

Cited by 8 publications

(5 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The trend obtained in the NH4-K competition experiment was, in general, the same as that found in other incubation experiments already done in soils with 2:1 clays [8,12,13,21].…”

Section: Competition Between Nh4 + and K + For Fixed Adsorption Sitessupporting

confidence: 88%

“…The fixed ammonium from the deep horizon (subsoil) was determined by a modification of the method proposed by Zhan, et al [21]. 5g of soil were weighed in two flasks, and sterilisation was carried out using the Autoclave at 120ºC and 1 atm pressure, then 2 mEq.100g -1 soil was added to one of the flasks as 5 mL of NH4Cl, and in the other, 5 mL of deionized water, to obtain a 1:1 soil:solution ratio.…”

Section: Determination Of Ammonium Fixationmentioning

confidence: 99%

See 1 more Smart Citation

NH4+ Fixation and Ionic Competition with K+ in a Clayey Soil from Ocumare Del Tuy, Venezuela

et al. 2022

View full text Add to dashboard Cite

Ammonium and potassium are essential for plant production, both share an ionic potential capable of entering the structure of some 2:1 type clay minerals, remaining fixed. Although, in Venezuela there are abundant areas with the presence of this type of clays, ammonium fixation (NH4f) has been little studied. The soil studied located in Los Valles del Tuy, Miranda State, presented clayey texture, some textural homogenization, and little differentiation in horizons, which is characteristic of Inceptisols. That soil also evidenced by XRD the abundant presence of nontronite / montmorillonite, resulting in a semi-quantification of 20% and 16.4% for the surface and subsoil horizons, respectively. The fixation of ammonium and the competition with potassium to occupy the fixed sites of these clays were studied by means of an incubation experiment, varying the concentration of K+ and keeping the concentration of NH4+ fixed, then extracting and determining the fixed ammonium by a photocolorimetry method. The soil presented a great ammonium fixing capacity, 49% of the total added was fixed in the absence of the competitive ion; however, NH4f fell drastically when both ions were added simultaneously, decreasing exponentially under increasing amounts of the competitive ion and staying constant around 8%. It seems possible that, the high toxicity induced by excessive fertilisation with ammonium sulfate could be counteracted in soils with capacity to retain K, if, at the expense of Kf, the levels of K in the soil solution are increased causing a decrease in the concentrations of N in the tissue.

show abstract

“…The trend obtained in the NH4-K competition experiment was, in general, the same as that found in other incubation experiments already done in soils with 2:1 clays [8,12,13,21].…”

Section: Competition Between Nh4 + and K + For Fixed Adsorption Sitessupporting

confidence: 88%

Section: Determination Of Ammonium Fixationmentioning

confidence: 99%

NH4+ Fixation and Ionic Competition with K+ in a Clayey Soil from Ocumare Del Tuy, Venezuela

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The study area has a subtropical humid monsoon climate that is influenced by the East Asian monsoon [44]. The annual average temperature and precipitation are approximately 14-20 • C and 1000-1400 mm, respectively [44,45]. Rice is one of the important food crops in the MLYR area, and its cultivated area accounts for 1/4 of the total rice cultivated area in China.…”

Section: Study Areamentioning

confidence: 99%

Preliminary Study on the Diversity of Soil Oribatid Mite (Acari: Oribatida) Community Reveals Both Longitudinal and Latitudinal Patterns in Paddy Fields along the Middle and Lower Reaches of Yangtze River, China

Sun,

Liu,

et al. 2023

Agronomy

View full text Add to dashboard Cite

Soil biodiversity plays an important role in maintaining soil fertility and agricultural health. Exploring the patterns of soil fauna diversity across geographical gradients is a fundamental and crucial scientific topic for understanding the mechanisms of soil biodiversity in farmlands. However, the spatial pattern of soil fauna diversity across longitudinal gradients has received far less attention. In order to explore the longitudinal pattern (west to east) of the composition and diversity of the soil oribatid mite community in paddy fields along the middle and lower reaches of the Yangtze River (MLYR), an investigation was carried out in July 2021 at nine sites spanning a longitudinal range of 8.86° (906 km) in southeastern China. In total, 19 taxa and 2392 individuals were observed with a density of 1535.47/m2. Protoribates and Ceratozetes were the most dominant and widely distributed genera along MLYR. The distribution patterns of the richness, abundance, and diversity index were obvious across the longitudinal and latitudinal gradients. The longitudinal pattern showed a quadratic distribution of first increasing and then decreasing, while the latitudinal pattern showed an increasing pattern with the increase in latitude (unimodal pattern). The influence of latitude on the abundance of the soil oribatid mite community was greater than that of longitude, and the influence of longitude on richness and the corresponding diversity index was greater. The dominance index did not show a distribution pattern in the longitudinal and latitudinal directions, while the evenness index showed only the distribution pattern in the longitudinal direction, and the latitudinal pattern was not significant. The results of this study suggest that the diversity of the soil oribatid mite community along MLYR displays both longitudinal and latitudinal patterns in paddy fields. Moreover, we highlighted the importance of integrating longitudinal and latitudinal patterns into spatial patterns of the soil fauna community in farmlands at a regional scale.

show abstract

“…Low clay content, high CCE, poor-developed soil, and the presence of a large quantity of minerals containing less K like palygorskite, resulted in the small quantity of K in subsurface of Entisols in the study area. Zhan et al (2014) stated that the differences of K fixation capacity in different soils may be related to the physical-chemical properties of soils such as CEC, clay content, K + saturation, and soil K content. Hosseinpur and Sinegani (2007) pointed out that the soils with heavy texture (clayey) and the soils with smectite as the predominant clay mineral have the largest quantity of non-exchangeable K. The soils with 2:1 clay minerals such as high-layer-charge smectite, vermiculite and illite, contain larger quantity of non-exchangeable K than the soils with kaolinite as the main mineral (Ghosh and Singh, 2001).…”

Section: 32mentioning

confidence: 99%

Potassium forms in calcareous soils as affected by clay minerals and soil development in Kohgiluyeh and Boyer-Ahmad Province, Southwest Iran

Shakeri

Abtahi

2018

J. Arid Land

View full text Add to dashboard Cite

Potassium (K) is known as one of the essential nutrients for the growth of plant species. The relationship between K and clay minerals can be used to understand the K cycling, and assess the plant uptake and potential of soil K fertility. This study was conducted to analyze the K forms (soluble, exchangeable, non-exchangeable and structural) and the relationship of K forms with clay minerals of calcareous soils in Kohgiluyeh and Boyer-Ahmad Province, Southwest Iran. The climate is hotter and drier in the west and south of the province than in the east and north of the province. A total of 54 pedons were dug in the study area and 32 representative pedons were selected. The studied pedons were mostly located on calcareous deposits. The soils in the study area can be classified into 5 orders including Entisols, Inceptisols, Mollisols, Alfisols and Vertisols. The main soil clay minerals in the west and south of the study area were illite, chlorite and palygorskite, whereas they were smectite, vermiculite and illite in the north and east of the province. Due to large amount of smectite and high content of organic carbon in soil surface, the exchangeable K in surface soils was higher than that in subsurface soils. It seems that organic matter plays a more important role than smectite mineral in retaining exchangeable K in the studied soils. Non-exchangeable K exhibited close relationships with clay content, illite, vermiculite and smectite. Although the amount of illite was the same in almost all pedons, amounts of structural and non-exchangeable K were higher in humid regions than in arid and semi-arid regions. This difference may be related to the poor reservoir of K + minerals like palygorskite and chlorite together with illite in arid and semi-arid regions. In humid areas, illite was accompanied by vermiculite and smectite as the K + reservoir. Moreover, the mean cumulative non-exchangeable K released by CaCl 2 was higher than that released by oxalic acid, which may be due to the high buffering capacity resulting from high carbonates in soils.

show abstract

Potassium Fixation and Release Characteristics of Several Normal and K-Exhausted Soils in the Middle and Lower Reaches of the Yangtse River, China

Cited by 8 publications

References 22 publications

NH4+ Fixation and Ionic Competition with K+ in a Clayey Soil from Ocumare Del Tuy, Venezuela

NH4+ Fixation and Ionic Competition with K+ in a Clayey Soil from Ocumare Del Tuy, Venezuela

Preliminary Study on the Diversity of Soil Oribatid Mite (Acari: Oribatida) Community Reveals Both Longitudinal and Latitudinal Patterns in Paddy Fields along the Middle and Lower Reaches of Yangtze River, China

Potassium forms in calcareous soils as affected by clay minerals and soil development in Kohgiluyeh and Boyer-Ahmad Province, Southwest Iran

Contact Info

Product

Resources

About