Produtividade e pseudoperfilhamento do alho influenciados pelo nitrogênio, potássio e cobertura morta

Trani, Paulo Espíndola; Camargo, Mônica Sartori de; Foltran, Dulcinéia Elizabete; Hiroce, Rúter; Arruda, Flávio Bussmeyer; Sawazaki, Haiko Enok

doi:10.1590/s0102-05362008000300008

Cited by 9 publications

(7 citation statements)

References 6 publications

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“…Tifton grass mulch provided increased dry matter weight of lettuce (Ferreira et al, 2013). For garlic, there was no effect of rice straw mulch (Trani et al, 2008). Despite the advantages of mulching for a reduction in temperature and an increase in soil moisture retention, there was also no difference in carrot yield after mulch of Cynodon spp.…”

Section: Resultsmentioning

confidence: 93%

Cauliflower Cultivars Associated with Urochloa decumbens Straw Mulch in Integrated Weed Management

2019

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In vegetable farming, the reduction in the use of herbicides has been an important factor in the definition of the production system. The objective of this research was to evaluate crop yield of cauliflower cultivars grown on Urochloa decumbens straw mulch, as well as the effect of the association between straw and cultivars on weed management. The treatments were arranged in a 2 x 4 factorial scheme: two managements (with or without U. decumbens straw mulch) and four cauliflower cultivars (Barcelona, Bromus, Júlia and Lisblanc). The experiment used a randomized block design with four replicates. There was no interference of straw mulch on crop yield of cauliflower cultivars. Hybrids Barcelona and Júlia presented yields of 22.0 and 23.9 t ha-1, respectively, and they did not differ from each other. The Bromus and Lisblanc materials did not adapt to the edaphoclimatic conditions of the region, which resulted in reduced cultural control and high weed emergence after weeding. U. decumbens straw had high control of the weed community (581.2 pls m-2 - without straw and 8.3 pls m-2 - with straw). It is concluded that the U. decumbens straw as mulch is an effective tool in integrated management of weeds in cauliflower crops, without interfering with crop yield, and its potential to control weed community density is approximately 98.6%, at 22 days after transplanting. The adaptability of the cauliflower cultivar to the region has a high impact on weed management.

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Section: Resultsmentioning

confidence: 93%

Cauliflower Cultivars Associated with Urochloa decumbens Straw Mulch in Integrated Weed Management

2019

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“…Significant yield difference between zero and 200 kg P 2 O 5 ha -1 was reported in low-P soils (4.3 mg P-Mehlich-1 dm -3 ) recording total bulb yield of 11–14 Mg ha -1 [ 62 ]. On the other hand, a small yield response to 100–150 kg K 2 O ha -1 was reported by [ 63 ], when total yield levels were low (3.5 to 7 Mg ha -1 ) in high-K soil (47 mg K dm -3 ). Mean fertilizer dosage of 371±39 kg P ha -1 , and 417± 62 kg K ha -1 in garlic farms, was recorded in Minas Gerais State, Brazil [ 8 ].…”

Section: Discussionmentioning

confidence: 89%

Garlic (Allium sativum) feature-specific nutrient dosage based on using machine learning models

Hahn

Parent

Paviani³

et al. 2022

PLoS ONE

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Brazil presents large yield gaps in garlic crops partly due to nutrient mismanagement at local scale. Machine learning (ML) provides powerful tools to handle numerous combinations of yield-impacting factors that help reducing the number of assumptions about nutrient management. The aim of the current study is to customize fertilizer recommendations to reach high garlic marketable yield at local scale in a pilot study. Thus, collected 15 nitrogen (N), 24 phosphorus (P), and 27 potassium (K) field experiments conducted during the 2015 to 2017 period in Santa Catarina state, Brazil. In addition, 61 growers’ observational data were collected in the same region in 2018 and 2019. The data set was split into 979 experimental and observational data for model calibration and into 45 experimental data (2016) to test ML models and compare the results to state recommendations. Random Forest (RF) was the most accurate ML to predict marketable yield after cropping system (cultivar, preceding crops), climatic indices, soil test and fertilization were included features as predictor (R2 = 0.886). Random Forest remained the most accurate ML model (R2 = 0.882) after excluding cultivar and climatic features from the prediction-making process. The model suggested the application of 200 kg N ha-1 to reach maximum marketable yield in a test site in comparison to the 300 kg N ha-1 set as state recommendation. P and K fertilization also seemed to be excessive, and it highlights the great potential to reduce production costs and environmental footprint without agronomic loss. Garlic root colonization by arbuscular mycorrhizal fungi likely contributed to P and K uptake. Well-documented data sets and machine learning models could support technology transfer, reduce costs with fertilizers and yield gaps, and sustain the Brazilian garlic production.

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“…Management strategies have been adjusted to achieve self-sufficiency in the Brazilian market, such as population density, fertilization types, vegetation cover content, and vernalization, which permitted garlic production in tropical regions [2,3]. Although the diversity of techniques applied in garlic cultivation stimulates a more abundant production, several studies have reported an increase in physiological anomalies such as super-sprouting or pseudo-sprouting, also known as secondary growth of the plant (equal to tillering).…”

Section: Introductionmentioning

confidence: 99%

“…The tissues normally differentiate into the reserve, vegetative, and covering leaves, but due to some endogenous factor of the plant, the covering leaves germinate and form additional leaves instead of transforming only into the layer that covers and protects the bulbils, giving the plant a thicket appearance. Tunic and bulbil exposure depreciates the commercial value of the bulb [2,3].…”

Section: Introductionmentioning

confidence: 99%

Plant Growth Regulator from the Essential Oil of Syzygium aromaticum L. for Inhibition of Secondary Growth of Garlic Cultivated under Tropical Conditions

Nasser,

Macedo,

Pinto

et al. 2024

AgriEngineering

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Garlic cultivation in tropical regions, such as the Brazilian Cerrado, faces the problem of secondary growth in the field induced by climatic conditions, which affects bulb quality and value. Clove essential oil (CEO) contains high levels of eugenol, which has the potential as an eco-friendly plant growth retardant (PGR) capable of reducing or inhibiting the secondary growth of bulbs in garlic cultivation. In this study, field experiments were carried out in two consecutive years (winter 2021 and 2022), spraying garlic plants with different concentrations of emulsion of CEO (0.0, 0.2, and 0.4%) in the differentiation phase; for comparison, the effects of water deficit, a prevalent agricultural technique in the region, were also evaluated. At a dose of 0.4%, the CEO reduced the prevalence of secondary growth and split bulbs without affecting yield. The mode of action of PGR was investigated by analyzing photosynthetic, enzymatic, and metabolomic parameters. The plants reduced amylolytic activity, and the photosynthetic parameters, after 7 days, were restored in both treatments. The analysis of the metabolomic profile of garlic leaves revealed changes in the pathways associated with the biosynthesis of fatty acids, wax, cutin, and suberin in plants treated with CEO, indicating possible damage to the surface coating of the leaf.

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Produtividade e pseudoperfilhamento do alho influenciados pelo nitrogênio, potássio e cobertura morta

Cited by 9 publications

References 6 publications

Cauliflower Cultivars Associated with Urochloa decumbens Straw Mulch in Integrated Weed Management

Cauliflower Cultivars Associated with Urochloa decumbens Straw Mulch in Integrated Weed Management

Garlic (Allium sativum) feature-specific nutrient dosage based on using machine learning models

Plant Growth Regulator from the Essential Oil of Syzygium aromaticum L. for Inhibition of Secondary Growth of Garlic Cultivated under Tropical Conditions

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