Physiological characteristics of grapevine under irrigation and fertilization management1

Andrade, Victor Pimenta Martins de; Silva, José Aliçandro Bezerra da; Sousa, José Sebastião Costa de; Oliveira, Fábio Freire de; Simões, Welson Lima

doi:10.1590/1983-40632017v4748640

Cited by 4 publications

(3 citation statements)

References 23 publications

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“…The Sub−middle SFB has been subjected to the expansion of irrigated agriculture (Figure 6), for example vineyards and mango orchards in the Juazeiro (Bahia State) and Petrolina municipalities (Pernambuco State) [86,87]. However, although a declined annual baseflow and TWS were found over the Sub-middle SFB (Figure 5e), significant trends in both annual and seasonal ET were not detected using GLEAM data.…”

Section: Discussionmentioning

confidence: 99%

Significant Baseflow Reduction in the Sao Francisco River Basin

Lucas

Kublik

Rodrigues

et al. 2020

Water

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Water scarcity is a key challenge to global development. In Brazil, the Sao Francisco River Basin (SFB) has experienced water scarcity problems because of decreasing streamflow and increasing demands from multiple sectors. However, the drivers of decreased streamflow, particularly the potential role of the surface-groundwater interaction, have not yet been investigated. Here, we assess long-term trends in the streamflow and baseflow of the SFB during 1980–2015 and constrain the most likely drivers of observed decreases through a trend analysis of precipitation (P), evapotranspiration (ET), and terrestrial water storage change (TWS). We found that, on average, over 86% of the observed decrease in streamflow can be attributed to a significant decreasing baseflow trend along the SFR, with a spatial agreement between the decreased baseflow, increased ET, and irrigated agricultural land in the Middle SFB. We also noted a decreasing trend in TWS across the SFB exceeding –20 mm year−1. Overall, our findings indicate that decreasing groundwater contributions (i.e., baseflow) are providing the observed reduction in the total SFR flow. A lack of significant P trends and the strong TWS depletion indicate that a P variability only has likely not caused the observed baseflow reduction, in mainly the Middle and Sub-middle SFB. Therefore, groundwater and surface withdrawals may likely be a driver of baseflow reduction in some regions of the SFB.

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Section: Discussionmentioning

confidence: 99%

Significant Baseflow Reduction in the Sao Francisco River Basin

Lucas

Kublik

Rodrigues

et al. 2020

Water

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“…The effect of nitrogen fertilization on chlorophyll content and the positive correlation between the relative chlorophyll index and leaf N content in grapevine cultivars was observed by Tecchio et al (2011) and Taskos et al (2015). In addition, effects on the relative index of leaf chlorophyll in table grape cultivars in response to the variation in fertilizer application rate, including sources of N, P2O5, and K2O, have been shown by Andrade et al (2017).…”

Section: Resultsmentioning

confidence: 84%

TEMPORAL VARIATION AND SPATIAL DISTRIBUTION OF RELATIVE INDICES OF LEAF CHLOROPHYLL IN GRAPEVINE cv. CHARDONNAY

et al. 2019

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Variation in the spatial distribution of leaf chlorophyll content associated with the progression of the phenological cycle of crops may occur in cultivated areas as a result of the variability of environmental conditions and of the intrinsic properties of the plants. The objective of the present study was to model the trend in variation and assess the temporal stability of index of chlorophyll a, b, and total chlorophyll (Chla, Chlb, and Chlt, respectively), and to characterize the spatial distribution of Chlt index in grapevine cv. 'Chardonnay'. The assessments consisted of in situ measurements made with a portable meter in a commercial vineyard located in the municipality of Espírito Santo do Pinhal, state of São Paulo, Brazil, in the period between flowering and fruit maturation. Descriptive statistics were applied to the indices and regression models were fitted to ascertain the relationship of their mean variation with time. The temporal stability of Chlt index was estimated using Spearman's rank correlation analysis and thematic maps were created using geostatistical analysis and spatial estimation by ordinary kriging. The Chlb and Chlt indices were non-linearly associated with cycle progression and their decrease after the start of maturation was estimated. The temporal stability of the Chlt index was low and variation in its spatial distribution was observed over the assessed period.

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“…Nutrients fertilization, mainly nitrogen (N), has great importance in quality and quantity of coriander produce (Diwan et al, 2018;Angeli et al, 2016). N is necessary for protein synthesis and the N leaf status is frequently measured by chlorophyll contents through indirect methods as leaf chlorophyll index (Andrade et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Morphological and Ecophysiological Indicators for Coriander Under Irrigation Depths and Nitrogen Levels

Delazari¹,

Copati²,

Silva³

et al. 2019

JAS

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Nitrogen fertilization and supplying of water are crucial factors for quality and quantity produces of coriander. The objective of this study was to evaluate morphological and ecophysiological characteristics for coriander under five irrigation depths and two doses of nitrogen (N). Experimental layout was completely randomized design in a split plot scheme with five replications. The irrigation depths (plot) was 25, 50, 75, 100 and 125% of crop evapotranspiration (ETc). The doses of N (subplot) corresponded to 35 and 70 kg ha-1. The cultivation of coriander (“Vedete”) was in a protected environment. The ratio between the aerial part and roots linearly increased with the increment of the irrigation depths and was highest under 70 kg ha-1 of nitrogen. The leaf area index linearly increased with the increment of the irrigation depths at both doses of N. The leaf index of chlorophyll “a” was highest under irrigation depths of 87 and 75% of ETc for 35 and 70 kg ha-1 of N, respectively. The leaf index of chlorophyll “b” decrease linearly with the increase of irrigation depths in both doses of N. The nitrogen use efficiency was maximized with high soil moisture conditions. The water use efficiency decreases linearly with increasing of irrigation depth. The best irrigation depth and nitrogen dose obtained in this study was 125% of ETc and 70 kg/ha. The leaf index of chlorophyll “a” and “b” are important indicators of hydric stress. The leaf index of chlorophyll “b” are negatively correlated with leaf area index. N supply increase the water use efficiency.

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Physiological characteristics of grapevine under irrigation and fertilization management1

Cited by 4 publications

References 23 publications

Significant Baseflow Reduction in the Sao Francisco River Basin

Significant Baseflow Reduction in the Sao Francisco River Basin

TEMPORAL VARIATION AND SPATIAL DISTRIBUTION OF RELATIVE INDICES OF LEAF CHLOROPHYLL IN GRAPEVINE cv. CHARDONNAY

Morphological and Ecophysiological Indicators for Coriander Under Irrigation Depths and Nitrogen Levels

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