FONTES E DOSES DE NITROGÊNIO NA PRODUÇÃO DE MUDAS DE AÇAIZEIRO (Euterpe oleracea Mart)

Bezerra, José Luiz; Neto, R. de C. Andrade; Lunz, Aureny Maria Pereira; Araújo, C. S. de; Almeida, U. O. de

doi:10.18677/encibio_2018a50

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…Increasing N doses promoted less seedling development in this work, the same was observed by other authors working with fruit species and native species from Amazon (Silva et al, 2015;Bezerra, 2018).…”

Section: This Variable Presented a Proportional Inversely Behavior To The N Doses Use Differently From What Was Observed Bysupporting

confidence: 90%

Application of different nitrogen doses in fertirrigated cacao seedlings

Trevisan

Silva

Araújo

et al. 2021

RSD

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The Medicilândia municipality is the main dried cocoa beans producer in Pará state, however, researches are being carried out in relation to the seedlings production. The study objective was to study the cacao seminal seedlings growth under a drip irrigation system, receiving different nitrogen doses with fixed doses of phosphorus (4,5 g) and potassium (3 g) through fertirrigation. The experiment was realized under greenhouse conditions with four treatments and five repetitions in a design of randomized blocks, being each composed by seven plants. Thus, T1 = check, without fertilization; T2 = 2 g of N + P and K; T3 = 7 g of N + P and K; T4 = 12 g of N + P and K. The treatments were scientific from the 31st to the 156th day after sowing, where the values of height, collar diameter and leaves number were obtained fortnightly. On the 156th day, the plants were harvested and obtained the root length, fresh matter and aerial part dry matter and root and the nutritional contents from the leaf and root plant tissue. The plants obtain results with the highest values of height, collar diameter and leaves number in the T2 treatment.

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Section: This Variable Presented a Proportional Inversely Behavior To The N Doses Use Differently From What Was Observed Bysupporting

confidence: 90%

Application of different nitrogen doses in fertirrigated cacao seedlings

Trevisan

Silva

Araújo

et al. 2021

RSD

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“…Results observed by Bezerra et al (2018) and Veloso et al (2015) in açaí palm seedling production justify the use of chemical fertilization in the substrates. Furthermore, according to Mota et al (2012), seedlings with a larger stem diameter tend to have a higher survival rate and better development after transplanting, which justifies the use of substrate fertilization for seedling production.…”

Section: Sources Of Variation Glmentioning

confidence: 76%

Production of Açaí Seedlings Under Different Shade Levels and Controlled Release Fertilizer

Maciel de Araújo,

De Carvalho Andrade Neto,

Oliveira de Almeida

et al. 2023

Rev. Agric. Neotrop.

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This study aimed to evaluate the production and quality of açaí seedlings regarding the presence and absence of controlled-release fertilization under different shading levels. The study was conducted at the experimental field of Embrapa - Acre, using a completely randomized design in a 4 x 4 factorial arrangement. The factors included four evaluation periods (60, 120, 180, and 240 days after transplanting) and four shading environments (20%, 30%, 50%, and 75%), along with the presence or absence of controlled-release fertilization. The following variables were analyzed: plant height, stem diameter, number of leaves, dry mass of leaves, stem, root, and total dry mass, as well as the seedling quality index and foliar levels of macro and micronutrients. The growth and development of açaí seedlings are influenced by the evaluation periods, shade environments, and the use of fertilization. Fertilization with controlled-release fertilizer and environments with30% and 50% shading improved the quality of açaí palm seedlings.

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“…Likewise, potassium in excess can interfere with plant absorption of other cations, inhibiting, for example, the absorption of Ca and Mg [39]. Nitrogen excess can promote excessive stem growth, causing an imbalance between shoot and root system, reducing tissue lignin content and seedling resistance in the nursery, and increasing susceptibility to pests and diseases, and less resistance to field conditions [40].…”

Section: Discussionmentioning

confidence: 99%

Growth and Quality of Yerba Mate Seedlings Affected by Fertilizer Doses in South Brazil

Walter

Gonçalves

Kratz

et al. 2022

Braz. arch. biol. technol.

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Given the lack of information on the use of controlled-release fertilizers in yerba mate seedlings production, this study aimed to evaluate growth and morphological characteristics of seedlings produced with two controlled-release fertilizers applied at different doses. We used seeds from a clonal seed orchard, which were sown in a commercial substrate based on peat and vermiculite, with Osmocote ® MiniPrill 3M (CRF 3M) and Basacote ® Plus 9M (CRF 9M) fertilizers, both in doses of 0, 2, 4, 6, 8, 10, and 12 kg m -3 . Seedling height and stem diameter were measured at 60, 90, 120, and 180 days after sowing and, at 180 days, shoot, root, and total biomass, tube withdrawal ease, and root aggregation. From these data, we calculated Dickson's quality index, technical efficiency, Height/Stem diameter ratio, and maximum technical efficiency dose. We verified values statistically superior to control treatment (0 kg m -3 ) in all variables in response to controlledrelease fertilizer 3M and 9M, demonstrating the viability of yerba mate seedling production using controlledrelease fertilizers. This is also evidenced through results obtained for growth in height and stem diameter. Although CRF 3M favored seedling growth, CRF 9M showed similar efficiency. The Osmocote ® MiniPrill 3M is more efficient than Basacote ® Plus 9M in most of the variables analyzed and has a lower input required to HIGHLIGHTS• Yerba mate seedlings are growth with controlled-release fertilizer.• Use of controlled-release fertilizer reduces the production costs.• The fertilizer 3M has a lower input required than fertilizer 9M.

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FONTES E DOSES DE NITROGÊNIO NA PRODUÇÃO DE MUDAS DE AÇAIZEIRO (Euterpe oleracea Mart)

Cited by 6 publications

References 8 publications

Application of different nitrogen doses in fertirrigated cacao seedlings

Application of different nitrogen doses in fertirrigated cacao seedlings

Production of Açaí Seedlings Under Different Shade Levels and Controlled Release Fertilizer

Growth and Quality of Yerba Mate Seedlings Affected by Fertilizer Doses in South Brazil

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