Doses de fósforo e irrigação na nutrição foliar do cafeeiro

Dominghetti, Anderson Willian; Scalco, Myriane Stella; Guimarães, Rubens José; Silva, Douglas Roberto Guimarães; Carvalho, João Paulo Santos; Pereira, Vinícius Alves

doi:10.1590/1807-1929/agriambi.v18n12p1235-1240

Cited by 9 publications

(6 citation statements)

References 12 publications

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“…Maximum P accumulation (0.015 g hole -1 ) was estimated with the application of a water depth corresponding to 100% ETc, revealing a 87.5% increment compared to the water depth of 40% ETc. Studying the effect of irrigation on P accumulation in coffee, [10] found that 100% ETc replacement led to the highest accumulations of P in the leaves.…”

Section: Resultsmentioning

confidence: 99%

Continuous and pulse fertigation on dry matter production and nutrient accumulation in coriander

Menezes

Silva

et al. 2020

DYNA

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This study aimed to evaluate the dry matter production and nutrient accumulation of coriander (Coriandrum sativum L.) under pulse and continuous fertigation depths. The experiment was conducted in randomized blocks in 2 x 5 factorial arrangement, with three replicates. Treatments consisted of two types of fertigation application (pulse and continuous) and five fertigation depths (40, 60, 80, 100 and 120% of crop evapotranspiration – ETc). Highest accumulations of dry matter, N, P, K, Fe, Mn, Cu and Zn were obtained with pulse fertigation. Pulse fertigation combined with depths lower than 100% ETc led to highest accumulations of K, Mn, Cu and Zn. The accumulation of nutrients decreased in the following order: K > N > Ca > P > Mg > S > Fe > Mn > Zn > Cu.

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Section: Resultsmentioning

confidence: 99%

Continuous and pulse fertigation on dry matter production and nutrient accumulation in coriander

Menezes

Silva

et al. 2020

DYNA

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“…The highest phosphorus (P) concentration occurred in the leaves (0.63 g kg -1 ) at 145 DAT, stems (0.47 g kg -1 ) at 180 DAT, and roots (0.57 g kg -1 ) at 159 DAT ( Fig 5). The higher accumulation of P in leaves was likely because of the high P mobility within the plant (Dominghetti et al, 2014), with P transported from older to younger tissues during P deficiency. A higher P concentration in leaves (2.63 g kg -1 ) was also found in 10-week-old Pilea sinofasciata plants grown in non-mineral soils (Zheng et al, 2014).…”

Section: Macronutrient Concentrations In Plant Tissuesmentioning

confidence: 99%

Growth, nutrient concentration and principal component analysis of Cagaita (Eugenia dysenterica DC.) seedlings grown in nutrient solution

Bessa¹,

Moreira²,

Silva³

et al. 2016

Aust J Crop Sci

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Cagaita (Eugenia dysenterica DC.) is a native fruit tree with high economical potential from the Brazilian Cerrado. However, little is known about the essential nutritional demands of its seedlings. To determine the nutrient demands of Cagaita, a greenhouse experiment was performed, in which plants were grown under hydroponic condition to assess the growth (length and diameter of stems, number of leaves, number of nodes, volume and length of roots, area of the leaf and crown and total dry weight of the leaves, stems and roots) and nutrient concentration (N, P, K, Ca, Mg, S, B, Cu, Fe, Mn and Zn) at different time points after the plant were transferred into a nutrient solution. The seedling growth presented linear behavior until 180 days after transplantation. The total plant dry weight was 6.54 g after 180 days of transfer into the nutrient solution. The N content was positively correlated with the total dry weight and leaf area, whereas B was negatively correlated with the length of the stem and number of leaves. Macro and micronutrient concentrations presented the following order: N>Ca>K>P>Mg>S, Fe>Mn>B>Zn>Cu. A principal component analysis of the different sampling times provided important information used to define the growth variables.

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“…When considering quantity and quality of the produced coffee, several factors can influence its production, among them, the nutritional status of the plant is of utmost importance for management strategies definition (Silva et al, 2010). Conventionally, large amounts of nutrients are required by this crop, whose demand is mainly represented by nitrogen (N), potassium (K), and phosphorus (P), which if properly managed can provide well developed and vigorous plants (Silva et al, 2010;Dominghetti et al, 2014;Pérez et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Spatial correlation between the chlorophyll index and foliar npk levels in coffee crop

Zanella

Rodrigues

Sousa

et al. 2020

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Detection of spatial variability of data that can improve crop management is a key factor for precision agriculture. In agriculture, there is a need for tools to assist farmers in decision-making about proper nutrient management, aiming to achieve their full productive potential. Based on that, this study aimed to (1) determine the spatial correlations between the chlorophyll index (CI) and the foliar levels of nitrogen, phosphorus and potassium (NPK) in the coffee crop using geostatistical tools; and (2) to evaluate the potential use of this index as a tool for site-specific nutrient management in an irrigated coffee field. For that, a study was carried out in a 2.1 ha area under arabica coffee cultivation in Paula Cândido, Minas Gerais State, Brazil. Samplings of the CI were performed in 1141 plants using a portable chlorophyll meter (SPAD-502). Regarding the NPK analysis, leaf samples from one of each 10 plants used to measure the CI were taken for chemical analysis (114 plants). Then, the data were submitted to descriptive and geostatistical analysis. For the spatial correlation analysis, the Moran Bivariate Global (I) and the Local index (Ixy) were used. The results showed a moderate correlation between the CI and N (0.500), showing the potential of the chlorophyll meter as a tool for site-specific nitrogen management in the coffee crop. Differently, the CI is not recommended for P and K management since they were not well correlated. Lastly, as a tool that performs indirect measurements, the results from the chlorophyll meter should be validated by field measurements to local calibrations.

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Doses de fósforo e irrigação na nutrição foliar do cafeeiro

Cited by 9 publications

References 12 publications

Continuous and pulse fertigation on dry matter production and nutrient accumulation in coriander

Continuous and pulse fertigation on dry matter production and nutrient accumulation in coriander

Growth, nutrient concentration and principal component analysis of Cagaita (Eugenia dysenterica DC.) seedlings grown in nutrient solution

Spatial correlation between the chlorophyll index and foliar npk levels in coffee crop

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