Agricultural use of phonolite and verdete rocks as a source of k for corn crop

Pessoa, Rodrigo Souza; Zonta, Everaldo; Pozza, Adélia Aziz Alexandre; Moretti, Bruno da Silva; Pessoa, Viviane de Fátima Silva; Inda, Alberto Vasconcellos

doi:10.1590/0034-737X202370050010

Acessibilidade / Reportar erro

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Soil and Plant Nutrition • Rev. Ceres 70 (5) • 2023 • https://doi.org/10.1590/0034-737X202370050010 copy

Agricultural use of phonolite and verdete rocks as a source of k for corn crop¹ 1 This article was extracted from the thesis of the first author.

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This study aimed to evaluate the effect of the application of Siliceous Rocks Powder as a source of K (phonolite and verdete) in natura and calcined at temperatures of 300, 600, 800 and 1000° C, pure and in consortium with dolomitic limestone and coffee husk to corn crop (Zea mays L.). The analyses of the phenological variables, stem diameter, number of shoots, leaves, plants height, weight of dry biomass of the aerial part and the contents of N, P and K, accumulated in the aerial part of the plants were performed. The range of calcination temperature between 300 °C and 600 °C, being the treatments that become K more available to the plants. The treatment that produced the highest biomass was the rocks in mixture (m/m) with coffee husk. The calcination temperatures influenced the biomass production and the content of macronutrients accumulated in the dry biomass of the aerial part. The least efficient treatment in the production of biomass was associated with the rocks in mixture with dolomitic limestone.

Keywords
alternative potassium sources; calcination; Zea mays

Treatments	Total K₂O content	Applied K₂O dose	Mineral and organic matrix mixture of K₂O content	Mass of rock and mixtures applied to the soil
	————— % —————	Kg há^-1	————— % —————	g 2000g^-1 soil/pot
Phonolite (unmixed)
KCl witness treatment	60.0	300	-	0.6
Phonolite in natura	8.10	300	-	8.6
Phonolite at 300 °C	8.10	300	-	8.6
Phonolite at 600 °C	8.30	300	-	8.6
Phonolite at 800 °C	8.20	300	-	8.6
Phonolite at 1000 °C	8.20	300	-	8.6
Phonolite (Calcined Phonolite)	Calcined Phonolite
KCl witness treatment	60.0	300	-	7.2
Phonolite CP in natura	8.42	300	0.32	17.2
Phonolite CP 300 °C	8.42	300	0.32	17.2
Phonolite CP 600 °C	8.62	300	0.32	17.2
Phonolite CP 800 °C	8.52	300	0.32	17.2
Phonolite CP 1000 °C	8.52	300	0.32	17.2
Phonolite (Coffee Husk)	Coffee Husk
KCl witness treatment	60.0	300	-	0.6
Phonolite CH in natura	29.2	300	21.1	6.0
Phonolite CH at 300 °C	29.2	300	21.1	6.0
Phonolite CH at 600 °C	29.4	300	2.1	6.0
Verdete (unmixed)
KCl witness treatment	60.0	300	-	0.6
Verdete in natura	11.10	300	-	10.4
Verdete at 300 °C	11.00	300	-	10.4
Verdete at 600 °C	11.30	300	-	10.4
Verdete at 800 °C	11.20	300	-	10.4
Verdete at 1000 °C	11.20	300	-	10.4
,0-Verdete Calcined Phonolite	Calcined Verdete
KCl witness treatment	60.0	300	-	0.6
Verdete CP in natura	11.42	300	0.32	20.4
Verdete CP at 300 °C	11.32	300	0.32	20.4
Verdete CP at 600 °C	11.62	300	0.32	20.4
Verdete CP at 800 °C	11.52	300	0.32	20.4
Verdete CP at 1000 °C	11.52	300	0.32	20.4
Verdete Coffee Husk	Coffee Husk
KCl witness treatment	60.0	300	-	0.6
Verdete CH in natura	32.20	300	21.1	7.2
Verdete CH at 300 °C	32.10	300	21.1	7.2
Verdete CH at 600 °C	32.40	300	21.1	7.2

Universidade Federal de Viçosa Av. Peter Henry Rolfs, s/n, 36570-000 Viçosa, Minas Gerais Brasil, Tel./Fax: (55 31) 3612-2078 - Viçosa - MG - Brazil
E-mail: ceres@ufv.br

Acompanhe os números deste periódico no seu leitor de RSS

[1] *Corresponding author: rodrigopessoasolo@gmail.com

Brasil

Brasil

Agricultural use of phonolite and verdete rocks as a source of k for corn crop1 1 This article was extracted from the thesis of the first author.

ABSTRACT

Agricultural use of phonolite and verdete rocks as a source of k for corn crop¹ 1 This article was extracted from the thesis of the first author.