Establishment of critical nutrient levels in soil and plant for eucalyptus

Neto, Antonio João de Lima; Neves, Júlio César Lima; Martínez, Herminia; Sousa, Jailson Silva; Fernandes, Loane Vaz

doi:10.36783/18069657rbcs20190150

Cited by 9 publications

(7 citation statements)

References 31 publications

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“…This imparts a problem while dealing with micronutrients, as their leaf contents tend to have a variability greater than 20% (Rodrigues Filho et al, 2021). Thus, in situations of higher coefficient of variation, the reference values assume greater amplitudes and may prove inadequate, which can be optimized by using relative productivity classes (Lima Neto et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

Reference values for nutritional diagnosis of ‘Gigante’ cactus pear by DRIS and BIK methods

et al. 2021

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The equilibrium and nutritional balance of plants are known to be of utmost importance to evaluate their yield potential and to comprehend the dynamics of nutrients in the soil-plant system. Hence, the present study determined the reference values for evaluating the nutritional status of ‘Gigante’ cactus pear cultivated with organic fertilization in semiarid conditions by Diagnosis and Recommendation Integrated System (DRIS) and Balanced Indexes of Kenworthy (BIK) methods. The cladodes nutrients contents and dry matter yield of 72 plots were employed. The database was classified into a high-yield and low-yield population, above and below 19.93 Mg ha-1 cycle-1, respectively. The five ranges of nutrient contents in cladodes were defined based on the standard deviation range(s) of the DRIS indexes of the high-yield population. Furthermore, the fixed BIK values made it possible to ascertain the lower and the upper limit of the reference values of nutrient contents in the cladodes. The reference values for all nutrients determined by the DRIS and BIK methods varied from each other and those reported in the literature. These methods were efficient in identifying the limiting nutrients for ‘Gigante’ cactus pear, with differences in the hierarchical order of limitation, due to lack or excess, and nutrients not limiting to productivity.

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Section: Resultsmentioning

confidence: 99%

Reference values for nutritional diagnosis of ‘Gigante’ cactus pear by DRIS and BIK methods

et al. 2021

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“…The points below BL refer to observations where other growth factors, limit the culture response to nutrient (SMITH; HARDIE, 2022). This method has been used successfully in the establishment of soil fertility interpretation patterns for several cultures (EVANYLO; SUMNER, 1987;DEUS et al, 2018;SOUSA et al, 2018;LIMA NETO et al, 2020). Therefore, the study aimed to establish P and K critical levels (CL) in the soil in banana commercial orchards, by the Boundary Line method (BL).…”

Section: Introductionmentioning

confidence: 99%

Boundary line method to update critical soil phosphorus and potassium levels in banana plantations in Santa Catarina

2023

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The rational use of correctives and fertilizers in banana orchards depends on reliable standards for interpreting soil fertility. The study aimed to establish critical levels (CL) for phosphorus (P) and potassium (K) in the soil of banana plantations in Santa Catarina, using the Boundary Line (BL) method. A database with information of soil chemical analysis and fruit yield obtained from orchards in producing regions was used. Scatter plots were obtained relating P and K concentration in the soil extracted by the Mehlich-1 method with the relative productivity of fruits and then the pairs of data in the upper border were selected and used to establish a mathematical model. The model was derived and obtained the concentrations of P and K in the soil that provided the maximum physical productivity (100 %) and maximum economic productivity (90% of the maximum production), corresponding to the CL in the soil. It is proposed that the update of critical levels of P and K for banana cultivation in Santa Catarina to be 85 and 229 mg/dm3, respectively. The banana grower will be able to suppress the P and K doses in a punctual and temporary way in areas of built fertility with the proper monitoring of productivity, soil and leaf analysis.

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“…Boundary-line sufficiency ranges have been reported for several crops including forage cactus (BLANCO-MACÍAS et al, 2010), wild blueberry (LAFOND, 2009), papaya (MAIA; MORAIS, 2016), sugarcane (MCCRAYET al., 2010), rubber tree (NJUKENG et al 2013), pitaya (ALMEIDA et al, 2016), and eucalyptus (LIMA NETO et al, 2020); however, studies on bananas grown under different conditions are in demand.…”

Section: Introductionmentioning

confidence: 99%

Potential nutrient-response curves and sufficiency ranges of ‘Grande Naine’ banana cultivated in two environment

et al. 2021

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Adequate plant nutrition is essential to attain higher yields. The objective was to determine potential-nutrient response curves and sufficiency ranges using the boundary line approach and balance indices of Kenworthy for interpreting the nutritional status of ‘Grand Nain’ banana cultivated in two environments. The study was carried out using a database containing leaf nutrient concentrations and yields of bananas cultivated on two areas located in Missão Velha-CE, and Ponto Novo-BA, Brazil. Plots with high-yielding plants, which were those with yields above average plus 0.5 standard deviation, were used atem as reference population. The database was subdivided into two sets. One of them contained 46 leaf tissue samples and reference population with yield greater than 58.84 Mg ha-1 year-1, in Missão Velha-CE. The second data set contained 19 samples and reference population with yield greater than 76.12 Mg ha-1 year-1 in Ponto Novo-BA. Potential response curves were fitted to the relationship between relative yield and leaf element concentrations and balance indices of Kenworthy. Models expressed high predictive power. Sufficiency ranges for macro- and micronutrient concentrations and balance indices of Kenworthy were established. The ranges allow an improved nutritional status assessment of irrigated ‘Grand Nain’ bananas.

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Establishment of critical nutrient levels in soil and plant for eucalyptus

Cited by 9 publications

References 31 publications

Reference values for nutritional diagnosis of ‘Gigante’ cactus pear by DRIS and BIK methods

Reference values for nutritional diagnosis of ‘Gigante’ cactus pear by DRIS and BIK methods

Boundary line method to update critical soil phosphorus and potassium levels in banana plantations in Santa Catarina

Potential nutrient-response curves and sufficiency ranges of ‘Grande Naine’ banana cultivated in two environment

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