Efficiency of the CL, DRIS and CND Methods in Assessing the Nutritional Status of Eucalyptus spp. Rooted Cuttings

Morais, Thaís Chagas Barros de; Prado, Renato de Mello; Traspadini, Edilaine Istéfani Franklin; Wadt, Paulo Guilherme Salvador; Paula, Rinaldo César de; Rocha, Antônio Márcio Souza

doi:10.3390/f10090786

Cited by 18 publications

(18 citation statements)

References 29 publications

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“…The leaf concentration in both clones growing in low K soil were below the K concentration recommended by Morais et al . (2019), regardless of the water conditions (Figure 4A,B). Under sufficient K, E. urophylla × camaldulensis had an increased leaf K concentration by water stress.…”

Section: Resultsmentioning

confidence: 90%

“…Overall, K concentration in leaves, stems, and roots was higher in plants grown with sufficient K than with low K in both clones (Figure 4). The leaf concentration in both clones growing in low K soil were below the K concentration recommended by Morais et al (2019), regardless of the water conditions (Figure 4A,B). Under sufficient K, E. urophylla × camaldulensis had an increased leaf K concentration by water stress.…”

Section: Drought-tolerant Eucalyptus Clones Increase K Concentration and Accumulation In Leaves And Stemmentioning

confidence: 84%

“…The K concentration in both clones grown with sufficient K and under well‐watered or moderate water‐stress conditions was considered adequate, remaining within the sufficiency range according to Morais et al . (2019). However, E. urophylla × camaldulensis plants that were severely water stressed showed a K concentration in leaves higher than the sufficiency range.…”

Section: Discussionmentioning

confidence: 99%

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Enhancing potassium content in leaves and stems improves drought tolerance of eucalyptus clones

Santos

Mateus

Rosário

et al. 2020

Physiologia Plantarum

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Eucalyptus are widely planted in regions with low rainfall, occasioning frequent drought stresses. To alleviate the stress-induced effects on plants growing in these environments, soil fertilization with potassium (K) may affect drought-adaptive plant mechanisms, notably on tropical soils with low K availability. This work aimed to evaluate the K dynamic nutrition in eucalyptus in response to soil-K and -water availabilities, correlating the K-nutritional status with the physiological responses of contrasting eucalyptus clones to drought tolerance. A complete randomized design was used to investigate the effects of three water regimes (well-watered, moderate water deficit, and severe water deficit) and two K soil supplies (sufficient and low K) on growth and physiological responses of two elite eucalyptus clones: "VM01" (Eucalyptus urophylla × camaldulensis) and "AEC 0144" (E. urophylla). Results depicted that the K-wellnourished E. urophylla × camaldulensis clone under severe water deficit maintained shoot biomass accumulation by upregulating the K-content in leaves and stems, gas exchange, water-use efficiency (WUE I ), leaf water potential (Ψw), and chlorophyll a fluorescence parameters, compared to E. urophylla clone. Meanwhile, E. urophylla with a severe water deficit showed a decreased of K content in leaves and stem, as well as a reduction in the accumulation of dry mass. Therefore, the K-use efficiency and the apparent electron transport rate through photosystem II were positively correlated in plants grown in low K, indicating the importance of K in maintaining leaf photochemical processes. In conclusion, management strategy should seek to enhance K-nutrition to optimize water-use efficiencies and photosynthesis.

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Section: Resultsmentioning

confidence: 90%

Section: Drought-tolerant Eucalyptus Clones Increase K Concentration and Accumulation In Leaves And Stemmentioning

confidence: 84%

Section: Discussionmentioning

confidence: 99%

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Enhancing potassium content in leaves and stems improves drought tolerance of eucalyptus clones

Santos

Mateus

Rosário

et al. 2020

Physiologia Plantarum

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“…Also was observed a low RD to evaluate the CND method, adopting NRr = 0.00, even though this was the diagnostic method with the best performance to assess the nutritional P status in sugarcane [20]. To eucalyptus seedlings was found that the highest RD proportions were achieved by the most e cient method in the nutritional diagnosis, which varied according to the nutrient evaluated [24].…”

Section: Analysis Of Diagnosis Predictionmentioning

confidence: 94%

Prescient Diagnostic Analysis for boron nutritional status in soy crops

Traspadini

Wadt

Prado

et al. 2022

Preprint

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Boron is the most limiting micronutrient for soybean yield; therefore, accurate identification of its nutritional status is important for adequate fertilization management and maximize soybean yield potential. Currently, tools for nutritional status interpretation of B, such as the CND and DRIS are used; however, their efficacy is not considered to identify the true nutritional status of B. Here, we investigated the efficacy of these methods to identify the nutritional status of B in 140 commercial soybean crops to obtain nutritional standards for the DRIS and CND methods. In addition, an experiment of B dose calibration (0, 300, 600, 1200 and 1800 g ha-1) was installed to assess the quality of nutritional diagnoses using the PDA. We tested the limits of 0.25, 0.50, and 1.00 for the NRr and values of 1%, 5%, or 10% for YR. The DRIS method was more effective and, on average, its variations increased yield by 27% compared to CND, with the best performance of DRIS when NRr = 1.00 was adopted with 10% for YR. This study highlights the need for reliable and accurate diagnostic methods with global implications for crop sustainability by improving the efficacy of B fertilization programs and crop yield.

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“…Plant tissue tests are thought to integrate the effects of growth factors on crop performance [ 10 ]. Regional tissue standards [ 11 ] have been developed to guide fertilization of Eucalyptus seedlings [ 8 , 12 , 13 ] and of trees more than 6 years of age [ 14 ]. No standards have been developed for trees of intermediate age.…”

Section: Introductionmentioning

confidence: 99%

Nutrient Diagnosis of Eucalyptus at the Factor-Specific Level Using Machine Learning and Compositional Methods

Paula

Arruda

Parent

et al. 2020

Plants

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Brazil is home to 30% of the world’s Eucalyptus trees. The seedlings are fertilized at plantation to support biomass production until canopy closure. Thereafter, fertilization is guided by state standards that may not apply at the local scale where myriads of growth factors interact. Our objective was to customize the nutrient diagnosis of young Eucalyptus trees down to factor-specific levels. We collected 1861 observations across eight clones, 48 soil types, and 148 locations in southern Brazil. Cutoff diameter between low- and high-yielding specimens at breast height was set at 4.3 cm. The random forest classification model returned a relatively uninformative area under the curve (AUC) of 0.63 using tissue compositions only, and an informative AUC of 0.78 after adding local features. Compared to nutrient levels from quartile compatibility intervals of nutritionally balanced specimens at high-yield level, state guidelines appeared to be too high for Mg, B, Mn, and Fe and too low for Cu and Zn. Moreover, diagnosis using concentration ranges collapsed in the multivariate Euclidean hyper-space by denying nutrient interactions. Factor-specific diagnosis detected nutrient imbalance by computing the Euclidean distance between centered log-ratio transformed compositions of defective and successful neighbors at a local scale. Downscaling regional nutrient standards may thus fail to account for factor interactions at a local scale. Documenting factors at a local scale requires large datasets through close collaboration between stakeholders.

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Efficiency of the CL, DRIS and CND Methods in Assessing the Nutritional Status of Eucalyptus spp. Rooted Cuttings

Cited by 18 publications

References 29 publications

Enhancing potassium content in leaves and stems improves drought tolerance of eucalyptus clones

Enhancing potassium content in leaves and stems improves drought tolerance of eucalyptus clones

Prescient Diagnostic Analysis for boron nutritional status in soy crops

Nutrient Diagnosis of Eucalyptus at the Factor-Specific Level Using Machine Learning and Compositional Methods

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