Response of Amaranthus cruentus cv Mexicano to nitrogen fertilization under irrigation in the temperate, semiarid climate of North Patagonia, Argentina

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

doi:10.1080/01904167.2018.1549674

Cited by 5 publications

(10 citation statements)

References 30 publications

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“…The increasing temperatures, occurring in the last 5-6 phenological phases, reduced leaf development to permit the plants a tolerance to adverse climatic conditions. similar results have been described by Zubillaga et al (2019) in argentina.…”

Section: Resultssupporting

confidence: 91%

“…all three sD permitted amaranth to attain to full maturation, even if with different yields, as will be discussed. The results of Zubillaga et al (2019) were corroborated by the present work, reporting a minimum 1600-1700 GDD necessary for the completion of the crop cycle. in the present experiment, the third sD benefited from a minor GDD (1480 °C), thereby imposing a shortening of the phenological phases ( Table 2).…”

Section: Resultssupporting

confidence: 87%

“…fertilizer treatment before seeding was as follows (Zubillaga et al, 2019): 76 kg ha -1 of n as ammonium nitrate, and 100 kg ha -1 of P 2 O 5 as superphosphate. a seed quantity of 9 kg ha −1 was used.…”

Section: Methodsmentioning

confidence: 99%

“…The choice of the most suitable sowing date has a direct effect on crop production. The emission of the inflorescence and flowering occur in optimum conditions, favoring maximum production (O'Brien et Price, 2008;Zubillaga et al, 2019). in a temperate Mediterranean environment, the spring sowing of amaranth cannot be performed too early, because the minimum temperature required for germination is approximately 12°C (Casini and La rocca, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Optimizing sowing time for boosting productivity and nutritional quality of amaranth (Amaranthus cruentus L.) genotypes under Mediterranean climate

Casini

Biancofiore

2020

AAS

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Currently, there is increasing interest in the cultivation of alternative grain crops, such as amaranth (Amaranthus cruentus L.) in Italy. However, few information exist for the most optimal sowing date (SD) of amaranth especially under rainfed conditions. A field-trial was conducted in Tuscany during 2018 to evaluate SD effects on amaranth genotypes (‘Kharkov’ and two new breeding lines coded ‘A-61’ and ‘A67’). The three SD were March 27 (first), April 20 (second), June 4 (third). Only the first and second SD coincided with increasing photoperiod. Cumulative Growing Degree Days (GDD) for ripening were 2282, 1990 and 1480 for the first, second and third SD, respectively. Compared to the first two SD, ground-cover was 20 % less from panicle formation in the third SD, therefore potentially less competitive towards weeds. A-67 was more “palatable” to the incidence of sugar beet flea beetle (Chaenoctema tibialis Illinger) from the earliest stages of growth. In contrast, ‘Kharkov’, was significantly less attacked by the insect over all three SD.‘Kharkov’, demonstrated greater flexibility with stable yields of 1.3 t ha-1 for the first and second SD. In contrast, significant yield reductions (1.5 to 1.2 t ha-1, from the first to second SD, respectively) were evident for both lines of amaranth in response to SD delay. Adverse effects of the third SD, included significant decline in yield, protein content and 1000 seed mass. In conclusion, amaranth, March-April SD may be recommended for obtaining optimal grain yield of amaranth along with making it successful as a viable alternative grain crop under under agro-ecological conditions of Central Italy.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 87%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimizing sowing time for boosting productivity and nutritional quality of amaranth (Amaranthus cruentus L.) genotypes under Mediterranean climate

Casini

Biancofiore

2020

AAS

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“…As predicted, the climate may change and, as a consequence, there will be changes in water availability. Plants, in general, respond positively to increment in nitrogen supply 17 and negatively to water stress 18 . The sensitivity of plants to water stress may be altered by factors such as nitrogen availability.…”

Section: Resultsmentioning

confidence: 99%

Physiological Responses of Amaranthus Cruentus L. to Drought Stress Under Sufficient- and Deficient-Nitrogen Conditions

Cechin¹,

Silva²,

Ferreira³

et al. 2021

Preprint

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Water and nitrogen availability are environmental factors that can impair plant growth, and when they are combined their effects can be intensified or reduced. The objective of this study was to analyse the influence of nitrogen availability on the responses of Amaranthus cruentus’s metabolisms to water stress. The plants were cultivated in plastic pots filled with vermiculite and kept under greenhouse conditions and were watered with 70% of full strength nitrogen-free Long Ashton solution, containing 1.97 or 9.88 kg N ha−1 as ammonium nitrate, three times a week. Photosynthetic parameter were evaluated in planta and leaves were harvested for chemical analysis of proline and phenolic contents. Higher nitrogen supply increased the shoot dry matter, photosynthetic pigments, photosynthesis, stomatal conductance, transpiration, total leaf nitrogen, proline, nitrate and ammonium but reduced the concentration of flavonoids and total phenols. Water stress for 6 days did not affect dry matter, photosynthetic pigments, leaf nitrogen, ammonium or specialized metabolites but increased the proline and affected negatively the other variables. The observed interactions between nitrogen and water supply resulted in no alleviation of the negative effects of drought on amaranth. Although the increase in nitrogen supply had benefits on plant performance, it intensified the negative effect of water stress. The study shows the importance of choosing the correct level of nitrogen fertilization in order to obtain satisfactory results in terms of plant growth under drought conditions.

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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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Response of Amaranthus cruentus cv Mexicano to nitrogen fertilization under irrigation in the temperate, semiarid climate of North Patagonia, Argentina

Cited by 5 publications

References 30 publications

Optimizing sowing time for boosting productivity and nutritional quality of amaranth (Amaranthus cruentus L.) genotypes under Mediterranean climate

Optimizing sowing time for boosting productivity and nutritional quality of amaranth (Amaranthus cruentus L.) genotypes under Mediterranean climate

Physiological Responses of Amaranthus Cruentus L. to Drought Stress Under Sufficient- and Deficient-Nitrogen Conditions

Amaranth irrigation frequency in northeast Patagonia, Argentina

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