Respostas do Pequizeiro à Irrigação e Adubação Orgânica

Júnior, José Alves; Taveira, Marcos; Casaroli, Derblai; Evangelista, Adão Wagner Pêgo; Vellame, Lucas Melo; Mozena, Wilson

doi:10.14688/1984-3801/gst.v8n1p47-60

Cited by 11 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Além da importância na alimentação humana, o pequizeiro pode ser utilizado na reconstituição da vegetação nativa (Alves Júnior et al, 2015). No entanto, em áreas de recomposição da vegetação nativa, ou em áreas de ocorrência natural do pequizeiro nota-se que áreas circunvizinhas podem ser canaviais, áreas de produção de culturas temporárias como milho, soja e arroz, bem como pastagens, onde o 2,4-D é comumente utilizado, caracterizando áreas particularmente sensíveis à deriva (Boutin et al, 2014;Egan et al, 2014).…”

unclassified

Crescimento inicial de plantas de pequi após aplicação de 2,4-D

et al. 2017

View full text Add to dashboard Cite

Resumo -O ácido 2,4-diclorafenóxacético (2,4-D) tem causado efeitos tóxicos em várias culturas cultivadas vizinhas ao local na qual foi destinado, devido à deriva durante sua aplicação. Objetivou-se, nesta pesquisa, avaliar o efeito da deriva simulada por meio de subdoses do herbicida 2,4-D em plantas de pequi (Caryocar brasiliense, Camb.). Testaram-se em blocos completos casualizados com seis repetições as doses de 0; 1, 67; 3,35; 6,70; 16,75; 33,50; 67,00 e 134,00 g ha -1 de equivalente ácido do herbicida. A unidade experimental foi de um vaso contendo uma planta de pequi. A aplicação de 2,4-D causou sintomas leves de epinastia nas folhas, com valores entre 6,25 e 13,33% de fitointoxicação nas plantas de pequi; contudo, ocorreu a recuperação das plantas a partir dos 15 dias após a aplicação. Foi observado efeito hormético para as variáveis área foliar, área foliar específica e razão de área foliar. Porém, com o aumento das doses, verificou-se redução no crescimento das mudas, caracterizada pela diminuição nas variáveis foliares e massa seca total das plantas. Comparado ao controle (dose zero) foram observados maiores valores da partição de fotoassimilados para a parte aérea das plantas. Initial growth of Caryocar brasiliense plants after application of 2,4-DAbstract -The 2,4-dichlorophenoxy acid (2,4-D) causes toxic effects on various cultivated crops surrounding the place in which it is sprayed due to drift. This work evaluated low doses of 2,4-D herbicide in simulated drifting on Caryocar brasiliense, Camb. seedlings. They were tested in a randomized complete block design with six replications, using herbicide acid equivalent doses of 0; 1. 67, 3.35, 6.70, 16.75, 33.50, 67.00 and 134.00 g ha -1 . The experimental unit was a vessel containing one C. brasiliense plant. The application of 2,4-D caused low epinasty in leaves with values between 6.25 to 13.33% phytotoxicity in C. brasiliense. However, there was full recovery of the plants 15 days after application. Hormesis effect was observed for leaf area, specific leaf area and leaf area ratio variables. However, with increasing doses there were reductions in seedlings growth characterized by reduction in leaf variables and plants total dry matter. Compared to control (zero dose) higher values of assimilates partition for aerial part of the plants were observed.

show abstract

unclassified

Crescimento inicial de plantas de pequi após aplicação de 2,4-D

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Soil moisture, or rather, excess moisture is a restrictive factor for the establishment of the subspecies. It should be noted that the common pequi tree is limited by excess soil moisture (Alves Júnior et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Spatial characterization of factors inherent in the microendemism of the dwarf pequi tree (Caryocar brasiliense subsp. intermedium (Wittm.) PRANCE & M. F. Silva)

Almeida

Guimarães

Santana

2023

An. Acad. Bras. Ciênc.

View full text Add to dashboard Cite

The dwarf pequi tree, Caryocar brasiliense subsp. intermedium, is extremely restricted to ecological niches in the Cerrado biome. Thus, understanding the conditioning factors of the micro-endemism of this sub-species through its spatial distribution and the physical-chemical attributes of the soil was the objective of this research. The research was carried out in a fragment of rupestrian field. The area was divided into quadrants in which the number of pequi trees was quantified and the physicochemical characteristics of the soil were determined. The modeling of semivariograms was performed using semivariances, and ordinary kriging was used for spatial interpolation of variables with spatial dependence. The number of pequi trees, the altitude, the remaining phosphorus and the humidity showed a strong degree of spatial dependence, unlike the pH, the calcium and the magnesium, all of which had a pure nugget effect. The other variables showed a moderate degree of spatial dependence. The greater availability of bases (SB > 0.1 cmolc dm -3 ) and phosphorus (> 1.05 mg dm -3 ), the reduced percentage of moisture (< 5%) and low potential acidity (< 4.0 cmolc dm -3 ) were the factors positively related to the establishment and development of the dwarf pequi tree in the area.

show abstract

“…The species used in this study are typical of the Cerrado and may adapt to the environment, since the Cerrado vegetation normally occurs in dystrophic soils, poor in calcium and magnesium and with high availability of aluminum (Alves Júnior et al, 2015). Therefore, complementary studies are necessary to evaluate different types and forms of biochar application for these species.…”

Section: Discussionmentioning

confidence: 99%

Filter Cake Biochar as a Soil Conditioner Cultivated with Native Cerrado Species: Effect on Soil Chemical and Microbiological Properties

et al. 2023

View full text Add to dashboard Cite

The objective of this study was to evaluate the effect of filter cake biochar on the chemical and microbiological attributes of a dystrophic red-yellow latosol cultivated with macaúba (Acrocomia aculeata), araçá (Psidium firmum) and cajuzinho do cerrado (Anacardium humile), species native to the Cerrado. Thus, the responses of soil attributes were evaluated 120 days after transplanting the seedlings using four doses of biochar (1%, 2%, 4% and 8% v/v) and two control treatments (one with soil correction and fertilization and the other with no fertilization). The attributes evaluated were pH, contents of calcium, magnesium, phosphorus, potassium, CTC, total and microbial organic carbon and nitrogen, and C:N ratio. For the soils cultivated with the three Cerrado species, the 1% dose of biochar and mineral fertilization were the treatments that best conditioned the soil during the cultivation period and promoted a better response of the chemical and microbiological attributes of the soil.

show abstract

Respostas do Pequizeiro à Irrigação e Adubação Orgânica

Cited by 11 publications

References 0 publications

Crescimento inicial de plantas de pequi após aplicação de 2,4-D

Crescimento inicial de plantas de pequi após aplicação de 2,4-D

Spatial characterization of factors inherent in the microendemism of the dwarf pequi tree (Caryocar brasiliense subsp. intermedium (Wittm.) PRANCE & M. F. Silva)

Filter Cake Biochar as a Soil Conditioner Cultivated with Native Cerrado Species: Effect on Soil Chemical and Microbiological Properties

Contact Info

Product

Resources

About