scholarly journals Irrigated rice sowing periods based on simulated grain yield

Agrometeoros ◽  
2020 ◽  
Vol 27 (2) ◽  
Author(s):  
Silvio Steinmetz ◽  
Santiago Vianna Cuadra ◽  
Ivan Rodrigues de Almeida ◽  
Nereu Augusto Streck ◽  
Alencar Júnior Zanon ◽  
...  
Keyword(s):  
Grain Yield ◽  
Relative Yield ◽  
Rio Grande ◽  
Sowing Date ◽  
Physiological Model ◽  
The State ◽  
Rio Grande Do Sul ◽  
Irrigated Rice ◽  
Short Cycle ◽  
Climatic Risk

This study aimed to establish the sowing periods with lower climatic risk for irrigated rice cultivation in the State of Rio Grande do Sul, Brazil, using the grain yield simulated by the SimulArroz which is an eco-physiological model based in processes that also simulates the development and the growth of the crop. The simulated grain yields were normalized for each of the four groups of cultivars, referenced as Relative Yield (YRel), considering the values of Reference Yield (YRef). The YRef considered was equal to the 80 percentile for the cultivars of groups 1 and 2 (Very short and Short cycle, respectively), and to the 90 percentile, for the cultivars of groups 3 and 4 (Medium and Long cycle, respectively). A successful year was when the YRel value was equal to or greater than 60% of YRef. These years were used to classify the climatic risk levels of 20% (80% success), 30% (70% success) and 40% (60% success). The preferential sowing periods for the four cultivar groups, at three levels of climatic risk, were established for all counties of the State of Rio Grande do Sul. The results indicated that the beginning of sowing occurs, depending on the group of cultivars, on September 1st or September 11th. On the other hand, the final sowing date varies with the group of cultivars and the level of risk involved, being December 20th the last sowing date for group 1 (Very short cycle). It is concluded that the SimulArroz model is appropriate to define the sowing periods of irrigated rice in Rio Grande do Sul considering grain yield, cycle of the cultivars and level of climatic risk.

scholarly journals Adaptability and stability of flood-irrigated rice cultivars released to the subtropical region of Brazil

2018 ◽  
Vol 53 (10) ◽  
pp. 1140-1149 ◽  
Author(s):  
Eduardo Anibele Streck ◽  
Ariano Martins de Magalhães Júnior ◽  
Paulo Ricardo Reis Fagundes ◽  
Gabriel Almeida Aguiar ◽  
Paulo Henrique Karling Facchinello ◽  
...  
Keyword(s):  
Grain Yield ◽  
Agronomic Traits ◽  
Rio Grande ◽  
The State ◽  
High Yield ◽  
Environment Interaction ◽  
Rice Cultivars ◽  
Rio Grande Do Sul ◽  
Whole Grain ◽  
Irrigated Rice

Abstract: The objective of this work was to estimate the effects of genotype x environment interaction and the genetic potential of flood-irrigated rice cultivars, released between 1972 and 2017, for the state of Rio Grande do Sul, Brazil. The experiments were carried out in the field, in all agroclimatic regions of flood-irrigated rice crop in the state, between the 2005/2006 and 2015/2016 crop years, totaling 60 environments (trials), with 1,961 experimental units. Twenty-five cultivars of irrigated rice were evaluated for the traits grain yield, plant height, days to flowering, and whole grain quality after milling. The values of adaptability and stability were estimated with the aid of mixed models. The rice cultivars BRS Pampa, BRS Pampeira, and BRSCIRAD 302 showed simultaneously high-genotypic grain yield, adaptability, stability, good agronomic traits, and good whole-grain yield after milling. 'BRSCIRAD 302' and 'BRS Pampa' show high-yield stability and can be recommended for all rice cultivation regions of Rio Grande do Sul. 'BRS Pampeira' is responsive to environmental improvements and is indicated for high-technology conditions.

scholarly journals Genetic progress of grain quality of flooded-irrigated rice cultivars in the state of Rio Grande do Sul, Brazil

2018 ◽  
Vol 53 (4) ◽  
pp. 453-463 ◽  
Author(s):  
Eduardo Anibele Streck ◽  
Ariano Martins de Magalhães Júnior ◽  
Gabriel Almeida Aguiar ◽  
Paulo Henrique Karling Facchinello ◽  
Lais Perin ◽  
...  
Keyword(s):  
Grain Quality ◽  
Amylose Content ◽  
Rio Grande ◽  
The State ◽  
Breeding Program ◽  
Rio Grande Do Sul ◽  
Genetic Progress ◽  
Irrigated Rice ◽  
High Amylose

Abstract: The objective of this work was to determine the genetic progress of grain quality attributes of flooded irrigated rice (Oryza sativa) cultivars in the state of Rio Grande do Sul, Brazil, between 1972 and 2016. The genetic estimates followed an approach based on the comparative analysis of 25 cultivars released by Embrapa’s breeding program over this period. The experiment was implemented in four producing regions of the state of Rio Grande do Sul: Sul, Campanha, Planície Costeira Interna, and Planície Costeira Externa. The following significant genetic gains were observed: 0.20% per year, for percentage of whole grains after processing; -1.38% per year, for percentage of chalky kernels and white-core grains; -0.77% per year, for total chalky area; -0.08% per year, for total whiteness; and -0.82% per year, for non-vitreous grain whiteness. Most cultivars released have high amylose content and a low gelatinization temperature. Therefore, the breeding program presented significant annual genetic progresses between 1972 and 2016 for the main attributes of grain quality, and made cultivars available according to the national demand for grain quality in the several segments of the rice production industry.

scholarly journals Aquatic Oligochaeta (Annelida: Clitellata) in wetlands and irrigated rice fields in the state of Rio Grande do Sul (Southern Brazil)

2021 ◽  
Vol 111 ◽  
Author(s):  
Mateus Marques Pires ◽  
Elisangela Secretti ◽  
Guilherme Rossi Gorni ◽  
Nathalie Aparecida de Oliveira Sanches ◽  
Carla Bender Kotzian
Keyword(s):  
New Records ◽  
Rio Grande ◽  
The State ◽  
Rice Fields ◽  
Aquatic Oligochaeta ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Irrigated Rice ◽  
Distribution Ranges ◽  
Stylaria Lacustris

ABSTRACT The knowledge of the diversity and distribution of aquatic Oligochaeta (Annelida: Clitellata) species is scarce in southern Brazil. This study presents a list of the species of aquatic Oligochaeta in wetlands and irrigated rice fields in the state of Rio Grande do Sul. Collections were carried out in two large wetland remnants and seven irrigated rice fields distributed in three regions across the state. We recorded eight species from two families (Alluroididae and Naididae). We expanded the distribution ranges of two species (Brinkhurstia americana and Stylaria lacustris), which represent new records for the state of Rio Grande do Sul and registered their occurrence in non-documented environments. In specific, the present study increases to 24 species the aquatic Oligochaeta diversity for the state of Rio Grande do Sul. In addition, the spatial distribution of the species recorded suggests that rice fields support a subset of the wetland fauna of aquatic Oligochaeta. The results provide important information on the ecology and distribution of limnic Oligochaeta and are useful to inform on the diversity of this fauna in agroecosystems.

scholarly journals Barley cultivar MN 698, high malting quality for the state of Rio Grande do Sul

2006 ◽  
Vol 36 (1) ◽  
pp. 279-281 ◽  
Author(s):  
Eduardo Caierão ◽  
Alessandro Luis Sperotto
Keyword(s):  
Grain Yield ◽  
Rio Grande ◽  
Industrial Sector ◽  
The State ◽  
Yield Potential ◽  
Malting Quality ◽  
Barley Cultivar ◽  
Rio Grande Do Sul ◽  
Important Advance ◽  
Moderately Resistant

MN 698 is a new cultivar developed by AmBev that resulted from a cross between the cultivars MN 599 and MN 635. MN 698 shows a grain yield potential higher than 4t ha-1, has early cycle and is moderately resistant to lodging. Its spike is uniform and produces around 20 grains well-distributed. MN 698 shows a medium tillering capacity (two to three per plant), and is characterized by the presence of anthocyanin in the culm basis, arists, and glumes. It is the national cultivar with the highest quality and represents an important advance for this cereal in Brazil, combining interests of both the producer and the industrial sector.

scholarly journals Crustacea, Isopoda, Oniscidea Latreille, 1802: new continent record and distribution extension in Brazil

Check List ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 217 ◽  
Author(s):  
Mariana Juventina Magrini ◽  
Paula Beatriz Araujo ◽  
Marcio Uehara-Prado
Keyword(s):  
Rio Grande ◽  
Sao Paulo ◽  
The State ◽  
Southeastern Brazil ◽  
Pitfall Traps ◽  
São Paulo ◽  
Undescribed Species ◽  
Rio Grande Do Sul ◽  
Serra Do Mar ◽  
First Time

Terrestrial Isopods were sampled in four protected Atlantic Forest areas located in Serra do Mar, state of São Paulo, southeastern Brazil. A total of 2,217 individuals of six species (Atlantoscia sp., Benthana werneri, Pseudodiploexochus tabularis, Pudeoniscus obscurus, Styloniscus spinosus and Trichorhina sp.) were captured in pitfall traps. The exotic species S. spinosus is recorded for the first time for the Americas. Another introduced species, P. tabularis, previously recorded only from the state of Rio Grande do Sul, had its geographic distribution extended to the state of São Paulo. The most abundant isopods in this study belong to an undescribed species of Atlantoscia.

Epidemiology of influenza B infection in the state of Rio Grande do Sul, Brazil, from 2003 to 2019

2021 ◽  
Author(s):  
Marina Beretta Duarte ◽  
Tatiana Schäffer Gregianini ◽  
Letícia G. Martins ◽  
Ana Beatriz G. Veiga
Keyword(s):  
Rio Grande ◽  
The State ◽  
Influenza B ◽  
Rio Grande Do Sul

scholarly journals Access to treatment for phenylketonuria by judicial means in Rio Grande do Sul, Brazil

2015 ◽  
Vol 20 (5) ◽  
pp. 1607-1616 ◽  
Author(s):  
Luciano Mangueira Trevisan ◽  
Tatiele Nalin ◽  
Tassia Tonon ◽  
Lauren Monteiro Veiga ◽  
Paula Vargas ◽  
...  
Keyword(s):  
Genetic Diseases ◽  
Rio Grande ◽  
Right To Health ◽  
The State ◽  
Rio Grande Do Sul ◽  
Access To Treatment ◽  
Unified Health System ◽  
Department Of Health ◽  
Legal Remedy ◽  
The Right

Treatment of phenylketonuria (PKU) includes the use of a metabolic formula which should be provided free of charge by the Unified Health System (SUS). This retrospective, observational study sought to characterize judicial channels to obtain PKU treatment in Rio Grande do Sul (RS), Brazil. Lawsuits filed between 2001- 2010 and having as beneficiaries PKU patients requesting treatment for the disease were included. Of 20 lawsuits filed, corresponding to 16.8% of RS patients with PKU, 19 were retrieved for analysis. Of these, only two sought to obtain therapies other than metabolic formula. In all the other 17 cases, prior treatment requests had been granted by the State Department of Health. Defendants included the State (n = 19), the Union (n = 1), and municipalities (n = 4). In 18/19 cases, the courts ruled in favor of the plaintiffs. Violation of the right to health and discontinuation of State-provided treatment were the main reasons for judicial recourse. Unlike other genetic diseases, patients with PKU seek legal remedy to obtain a product already covered by the national pharmaceutical assistance policy, suggesting that management failures are a driving factor for judicialization in Brazil.

scholarly journals Freshwater temperature in the state of Rio Grande do Sul, Southern Brazil, and its implication for fish culture

2008 ◽  
Vol 6 (2) ◽  
pp. 275-281 ◽  
Author(s):  
Luciano de Oliveira Garcia ◽  
Carlos Eduardo Copatti ◽  
Flávio Wachholz ◽  
Waterloo Pereira Filho ◽  
Bernardo Baldisserotto
Keyword(s):  
Water Temperature ◽  
Fish Species ◽  
Native Species ◽  
Amazon Basin ◽  
Rio Grande ◽  
The State ◽  
Tropical Species ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Lower Growth

In this study we verified data of water temperatures collected by CORSAN-RS from 1996 to 2004 in several cities of the state of Rio Grande do Sul, southern Brazil, and analyzed the possibility of raising the most cultivated fish species in Brazil. The water temperature from 1996 to 2004 was 16 to 28ºC in summer, 17 to 23ºC in fall, 14 to 17ºC (down to 9ºC in the coldest months) in winter and 14 to 21ºC in spring. Native species of this state, such as silver catfish (Rhamdia quelen), traíra (Hoplias malabaricus), dorado (Salminus brasiliensis), pintado (Pimelodus maculatus), as well as carps (family Cyprinidae), are resistant to the low winter temperatures. These species have a lower growth rate in coldest months (winter/spring) but a good development in warmer months (summer/fall), reaching a satisfactory performance throughout the year. In the periods of more intense cold, mortality of some introduced species, such as surubim from Amazon Basin (Pseudoplatystoma sp.), pirapitinga (Piaractus brachypomus), pirarucu (Arapaimas gigas), pacu (Piaractus mesopotamicus), tambaqui (Colossoma macropomum) and Nile tilapia (Oreochromis niloticus) may occur. In addition, as most tropical species have a thermal range for growth and reproduction between 20 to 28ºC, some species may have poor development even in fall. Therefore, water temperature in this state should be considered in the choice of fish species to be cultivated.

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