Amaranth in southernmost latitudes: plant density under irrigation in Patagonia, Argentina

Zubillaga, María; Camina, Ricardo; Orioli, Gustavo Adolfo; Failla, Mauricio; Barrio, Daniel Alejandro

doi:10.1590/0034-737x202067020001

Cited by 4 publications

(5 citation statements)

References 22 publications

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“…This can be attributed to the fact that in denser plantings, field germination slightly decreased, and the survival rate of plants from the seedling stage to harvesting sharply declined. In the studies by Zubillaga et al (2020), increasing plant density led to a significant decrease in all biometric parameters determined during harvest collection. Intraspecific competition reduced plant height, panicle length, leaf and branch count, stem mass, and diameter, which reflected in smaller individual plant biomass.…”

Section: Note: Values That Contain At Least One Identical Letter In A...mentioning

confidence: 93%

Amaranth yield depending on the sowing rate

Tyrus,

Lykhochvor,

Dudar

et al. 2023

Scientific Horizons

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The main value of amaranth lies in its ability to accumulate a large amount of protein in its seeds and leaves. With a seed protein content of 15-18%, amaranth surpasses wheat (12-14%), rice (7-10%), maize (9-10%), and other grain crops. The purpose of this study was to establish the optimal seed sowing rates for amaranth under the conditions of the Western Ukrainian Forest-Steppe zone. The study employed general scientific methods such as analysis, synthesis, experimentation, description, observation, and comparison, as well as field methods like phenological observations and record-keeping, along with statistical and correlation-regression analyses for data processing. The sowing rates of the variety Kharkivskyi 1 were investigated under conditions of sufficient moisture on dark-grey forest soil. It was found that the field germination varied with different sowing rates. At a sowing rate of 0.2 million seeds/ha, the field uniformity was 70%, but it decreased to 60% at a sowing rate of 1.2 million seeds/ha, representing a 10% decrease. Higher sowing rates resulted in greater plant density. In the seedling stage, there were 14 plants per 0.2 million seeds/ha sowing rate, while at 1.2 million seeds/ha, the number of plants increased to 72/m². Plant survival during the vegetation period sharply decreased with increased planting density, from 86% at a sowing rate of 0.2 million seeds/ha to 45% at a sowing rate of 1.2 million seeds/ha. Therefore, before harvesting, the plant density was adjusted to 12-32 plants/m². The best combination of the main elements of the structure was found to be 21 plants/m² and 26 plants/m², with a grain weight per plant of 20.4g and 16.1g, respectively. The highest grain yield of amaranth variety Kharkivskyi 1 was obtained at sowing rates of 0.4 million seeds/ha and 0.6 million seeds/ha, resulting in 4.28 t/ha and 4.20 t/ha, respectively. Any increase or decrease in sowing rates led to a decrease in the yield level. The results of this study can be used for further establishment and improvement of the main elements of amaranth cultivation technology by both scientific institutions and agricultural farms

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Section: Note: Values That Contain At Least One Identical Letter In A...mentioning

confidence: 93%

Amaranth yield depending on the sowing rate

Tyrus,

Lykhochvor,

Dudar

et al. 2023

Scientific Horizons

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“…As described in Zubillaga et al (2020), during the growth cycle, the following biometric parameters were measured in 10 plants per treatment and for the subplot (for both production cycles, n: 60) : maximum number of leaves (ML), maximum number of nodes (MN) and maximum number of ramifications (MR) with a weekly frequency of seven days. At the end of the growth cycle these selected plants in each treatment were harvested to measure the number of leaves at harvest (LH), ramifications at harvest (RH), foliar area at harvest (FAH), plant height (PH), panicle length (PL) and stem diameter (SD).…”

Section: Biometric Parametersmentioning

confidence: 99%

“…The statistical analysis was carried out with InfoStat software (Di Rienzo et al, 2016) as described in Zubillaga et al (2020). A double ANOVA (years x treatments) was applied to each variable with a randomized block design in each year.…”

Section: Biometric Parametersmentioning

confidence: 99%

“…Amaranthus cruentus cv Mexicano belongs to the Amaranthaceae family and this cultivar develops adequately in the edaphoclimatic conditions of northern Patagonia, Argentina (Zubillaga, 2017;Zubillaga et al, 2019;Zubillaga et al, 2020). Cultivated grain amaranth has attracted attention as a human nutritional source because its seeds contain a high content of protein (15-18%) and the amino acid composition is similar to the optimum balance required in the human diet (Correa et al, 1986;Cassini & La Rocca, 2014;Alemayehu et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Amaranth irrigation frequency in northeast Patagonia, Argentina

Zubillaga¹,

Martínez²,

Camina³

et al. 2021

Biotechnol. Agron. Soc. Environ.

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Introduction. The production potential of grain amaranth has recently been demonstrated in northeastern Patagonia, Argentina. This crop under irrigation and in a temperate semi-arid climate showed an adequate development of the plants in their different phenological stages with high economic performance. Objectives. This study explored the response of Amaranthus cruentus cv Mexicano to different irrigation frequencies in the lower valley of Río Negro river, Patagonia, Argentina. Method. The experimental design was of three blocks with randomized treatments (subplots), each one corresponding to a different irrigation frequency. The first six irrigations were performed every 7 days for all the treatments, to ensure the establishment of the crop. Then the following treatments were applied: irrigation every 7 days (FI), every 14 days (FII), and every 21 days (FIII). The following biometric variables and their components were measured: height of plant, number of leaves, biomass and economic yield. Results. The results suggest that the optimum irrigation frequency was FII (14 days), resulting in an adequate plant stand at panicle initiation and allows a proper development of plant with optimal biological and economical yields and the highest efficiency of water use (4.02 kg·m-3). Conclusions. The contributions of this study demonstrated the production potential of A. cruentus crop in the lower valley of the Río Negro river under irrigation, representing the southernmost study on irrigation frequency made for this grain crop in the world. A management of irrigation water of 7 days for the establishment of the crop and then with a frequency of 14 days showed the highest yield and the best water use efficiency.

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“…The genus Amaranthus includes around 70 species scattered across the globe, which are useful as food cultures and are cultivated both for leaves and seeds consumption (Silva et al, 2018;Zubillaga et al, 2020). In the past, some of these species were used in the feeding of rural populations, and, recently, its importance is restricted to the fact they are invasive plants.…”

Section: Introductionmentioning

confidence: 99%

Nutritional and bioactive compounds of Amaranthus spp. in Brazil

Souza

Salimena²,

Xavier³

et al. 2022

RSD

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The objective of this research was to evaluate the physicochemical characteristics of Amaranthus spp. commonly happening in Brazil, besides defining the efficiency of different extraction processes of the phenolic compounds and of the antioxidant activity. Five species of the genus Amaranthus (A. spinosus, A. viridis, A. retroflexus, A. hybridus var. paniculatus e A. deflexus) were evaluated in regard to their physicochemical characteristics such as vitamin C, soluble solids, pH, moisture, lipids and protein levels as well as the coloration of the leaves. Also, the phenolic compounds and the antioxidants were defined through four extraction processes (reflux; hydroalcoholic turbo-extraction; aqueous; and methanolic). The species A. spinosus has stood out for its vitamin C levels, pH and moisture, indicating the potential of the species when compared to the others. The leaf extracts of the five Amaranthus species present differences in the total phenol levels, flavonoids and hydro flavonoids when subject to different extraction methods. The antioxidant activities were favored by the reflux and hydroalcoholic turbo-extraction, with A. viridis standing out in the reflux methods and A. spinosus in the hydroalcoholic.

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Amaranth in southernmost latitudes: plant density under irrigation in Patagonia, Argentina

Cited by 4 publications

References 22 publications

Amaranth yield depending on the sowing rate

Amaranth yield depending on the sowing rate

Amaranth irrigation frequency in northeast Patagonia, Argentina

Nutritional and bioactive compounds of Amaranthus spp. in Brazil

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