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All publications of “João Kaminski”

18 results

Does Ferralsol Clay Mineralogy Maintain Potassium Long-Term Supply to Plants?

Diovane Freire Moterle ORCID logo , Edson Campanhola Bortoluzzi, João Kaminski, Danilo dos Santos Rheinheimer, Laurent Caner


ABSTRACT Ferralsols ( Latossolos ) should contain few or no 2:1 clay minerals and have low potassium (K) contents, and consequently low levels of non-exchangeable K forms are expected. The aim of this study was to evaluate how the clay mineralogy of a Ferralsol affects the soil K dynamics in response to K fertilization during cropping and whether the clay mineralogy was altered due to successive crops and K fertilization. A tropical Brazilian Ferralsol under field conditions was sampled (0.00-0.20 […]

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Biomass decomposition and nutrient release from black oat and hairy vetch residues deposited in a vineyard

Paulo Ademar Avelar Ferreira, Eduardo Girotto, Gustavo Trentin, Alcione Miotto, George Wellington de Melo, Carlos Alberto Ceretta, [...]


A significant quantity of nutrients in vineyards may return to the soil each year through decomposition of residues from cover plants. This study aimed to evaluate biomass decomposition and nutrient release from residues of black oats and hairy vetch deposited in the vines rows, with and without plastic shelter, and in the between-row areas throughout the vegetative and productive cycle of the plants. The study was conducted in a commercial vineyard in Bento Gonçalves, RS, Brazil, from October 2008 to […]

Soybean root growth and crop yield in reponse to liming at the beginning of a no-tillage system

Edson Campanhola Bortoluzzi, Guilherme Luis Parize, Jackson Korchagin, Vanderlei Rodrigues da Silva, Danilo dos Santos Rheinheimer, João Kaminski


Analyzing the soil near crop roots may reveal limitations to growth and yield even in a no-tillage system. The purpose of the present study was to relate the chemical and physical properties of soil under a no-tillage system to soybean root growth and plant yield after five years of use of different types of limestone and forms of application. A clayey Oxisol received application of dolomitic and calcitic limestones and their 1:1 combination in two forms: surface application, maintained on […]

Spectroscopic quantification of soil phosphorus forms by 31p-nmr after nine years of organic or mineral fertilization

Luciano Colpo Gatiboni, Gustavo Brunetto, Danilo dos Santos Rheinheimer, João Kaminski, Carla Maria Pandolfo, Milton Veiga, [...]


Long-standing applications of mineral fertilizers or types of organic wastes such as manure can cause phosphorus (P) accumulation and changes in the accumulated P forms in the soil. The objective of this research was to evaluate the forms of P accumulated in soils treated with mineral fertilizer or different types of manure in a long-term experiment. Soil was sampled from the 0-5 cm layer of plots fertilized with five different nutrient sources for nine years: 1) control without fertilizer; 2) […]

Santa Maria Buffer as an alternative to the SMP buffer to measure potential acidity of acid soils

Jaderson dos Anjos Toledo, João Kaminski, Maria Alice Santanna, Danilo Rheinheimer dos Santos


The SMP buffer contains p-nitrophenol and potassium chromate, both hazardous substances. A solution without toxic substances, the so-called Santa Maria buffer (TSM) was developed to reproduce performance of the SMP buffer used to estimate potential acidity of soils in Rio Grande do Sul and Santa Catarina (SMP-RS/SC). Acid titrations of the SMP- RS/SC buffer and various mixtures of the components of the new buffer were performed, using multiparametric regression analysis to obtain the optimal TSM composition. The efficiency of TSM […]

Forms of inorganic phosphorus in soil under different long term soil tillage systems and winter crops

Tales Tiecher, Danilo Rheinheimer dos Santos, João Kaminski, Ademir Calegari


The cultivation of crops with different capacity of P uptake and use under long-term soil tillage systems can affect the distribution of P cycling and inorganic forms in the soil, as a result of higher or lower use efficiency of P applied in fertilizers. The purpose of this study was to evaluate the effect of long-term cultivation of different winter species under tillage systems on the distribution of inorganic P forms in the soil. In 1986, the experiment was initiated […]

Evaluation of Sikora instead of SMP buffer to estimate the potential acidity of brazilian soils

Maria Alice Santanna, João Kaminski, Danilo dos Santos Rheinheimer, Jaderson dos Anjos Toledo, Carlos Alberto Casali


Despite the efficiency of the Shoemaker, McLean, Pratt (SMP) buffer method in estimating soil acidity, the presence of p-nitrophenol and potassium chromate in the solution, both hazardous substances, has caused increasing environmental concerns. The purpose of this study was to test Sikora method (Sikora, 2006) as an alternative to the adapted SMP buffer method, generally used to estimate potential acidity of Southern Brazilian soils. For the test, 21 soils in the South and Cerrado regions of Brazil were sampled. (1) […]

Potassium availability in a hapludalf soil under long term fertilization

João Kaminski, Diovane Freire Moterle, Danilo dos Santos Rheinheimer, Luciano Colpo Gatiboni, Gustavo Brunetto


In a system in which fertilization is recommended, diagnosis of soil K availability and the establishment of critical levels are made difficult by the possibility of a contribution of non-exchangeable forms of K for plant nutrition. Due to its magnitude, this contribution is well diagnosed in long term experiments and in those which compare fertilization systems with positive and negative balances in terms of replacement of the K extracted by plants. The objective of this study was to evaluate K […]

Contribution of soil constituents to the cation exchange capacity as determined by different extraction methods

Edson Campanhola Bortoluzzi, Danilo dos Santos Rheinheimer, Claudia Petry, João Kaminski


The cation exchange capacity (CEC) is a physicochemical property dependent on mineral and organic soil constituents. Despite the use of different procedures and extractors the CEC is normally expressed considering only the pH control or not of the extracted solution. This study aims to discuss the significance of the contribution of organic carbon and clay to the CEC of an Acrisol, using different determination methods. For this purpose, 75 samples of an abruptic Red-Yellow Acrisol from the Universidade Federal de […]

Soil phosphorus forms after successive pig slurry application in a native pasture

Luciano Colpo Gatiboni, Gustavo Brunetto, João Kaminski, Danilo dos Santos Rheinheimer, Carlos Alberto Ceretta, Claudir José Basso


The swine industry generates large amounts of pig slurry (PS), which is reused as agricultural fertilizer. However, if applied at excessive rates, pig slurry becomes a severe environmental pollutant. The objective of this study was to evaluate forms of soil phosphorus accumulation after successive swine manure applications. The experiment was installed in 1995, in an area of native pasture. Rates of 0, 20 and 40 m3 ha-1 of PS were applied periodically (at 45 to 60 days intervals) during five […]

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