scholarly journals Nitrogen fertilization in the growth phase of 'Chardonnay' and 'Pinot Noir' vines and nitrogen forms in sandy soil of the Pampa Biome

Revista CERES ◽  
2017 ◽  
Vol 64 (4) ◽  
pp. 433-440 ◽  
Author(s):  
Felipe Lorensini ◽  
Carlos Alberto Ceretta ◽  
Lessandro De Conti ◽  
Paulo Ademar Avelar Ferreira ◽  
Max Kleber Laurentino Dantas ◽  
...  
Keyword(s):  
Plant Height ◽  
Sandy Soil ◽  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Rio Grande ◽  
Pinot Noir ◽  
Rio Grande Do Sul ◽  
Mineral N ◽  
Total N ◽  
Pampa Biome

ABSTRACT Information on nitrogen fertilization in growing vines is still a very limited subject, especially for crops on sandy soils in the Pampa Biome in Rio Grande do Sul, where viticulture has expanded considerably in the last decade. This study aimed to assess the impact of N doses on growth of young plants of Chardonnay and Pinot Noir vines and N forms present in sandy soil in the Pampa Biome. The experiment was conducted from October 2011 to December 2012 in a vineyard in Santana do Livramento, in Southern Rio Grande do Sul State, in soil with 82 g kg-1 clay in the 0-20 cm layer. Vines of Chardonnay and Pinot Noir varieties were subjected to applications of 0, 10, 20, 40, 60, and 80 kg N ha-1 year-1. Total N in leaves, SPAD readings, stem diameter, plant height, and dry matter of the pruned material were evaluated in two growth cycles and three times. Soil samples were collected at 0-10 and 10-20 cm depths at four crop growth stages, in which N-NH4 +, N-NO3 -, and total N were analyzed and the mineral N was calculated. The N levels applied to young vines, although they did not provide relevant changes in the N-NH4 +, N-NO3 -, and mineral N contents in the soil, were able to increase the N content in the leaves, increasing plant vigor. because the reason is that there was an increase in stem diameter, plant height, and dry matter of pruned material in most evaluation periods. These parameters suggest better growth patterns and uniformity of young grapevines with possible positive effects in anticipation of production, demonstrating the importance of nitrogen fertilization strategies to the growing vines in the sandy soil conditions of the Pampa Biome.

scholarly journals Competitive analysis of soybean and sudangrass using replacement series design

Revista CERES ◽  
2016 ◽  
Vol 63 (5) ◽  
pp. 668-675
Author(s):  
Mauro Antônio Rizzardi ◽  
Alana Cristina Dorneles Wandscheer ◽  
Andrea Ferreira Hoffmann
Keyword(s):  
Competitive Analysis ◽  
Dry Matter ◽  
Rio Grande ◽  
Agricultural Crops ◽  
Rio Grande Do Sul ◽  
Replacement Series ◽  
Series Design ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Agricultural Areas

ABSTRACT Competition is the best known form of direct interference of weeds on agricultural crops. However, there is relatively little information on the competition of the weed sudangrass on soybean, which has been common in agricultural areas in the southern of Rio Grande do Sul. The objective of this study was to evaluate the competition between sudangrass and soybeans using replacement series experiments. The experiment was carried out in a greenhouse in a completely randomized design with four replications. The treatments consisted of soybean and sudangrass associations. The experimental units were 8-L plastic pots, in the proportions 0: 8, 2: 6, 4: 4, 6: 2, 8: 0, corresponding to 0, 25, 50, 75 and 100% of the crop and weed respectively. Shoot, root and total dry matter and plant height were analyzed through diagrams applied to replacement series and competitive indices. Soybean showed competitive superiority in coexistence with sudangrass in relation to shoot, root and total dry matter. The intraspecific competition was more significant for the crop and inter-specific competition was more important for the weed.

scholarly journals Morphological variation in Paspalum nicorae Parodi accessions, a promising forage

2010 ◽  
Vol 67 (2) ◽  
pp. 143-150 ◽  
Author(s):  
Camila Aparecida de Oliveira dos Reis ◽  
Miguel Dall'Agnol ◽  
Carlos Nabinger ◽  
Maria Teresa Schifino-Wittmann
Keyword(s):  
Plant Height ◽  
Morphological Variation ◽  
Geographical Location ◽  
Rio Grande ◽  
Morphological Characterization ◽  
Leaf Length ◽  
Rio Grande Do Sul ◽  
Breeding Programs ◽  
Grazing Tolerance ◽  
Leaf Hairiness

Paspalum nicorae Parodi is a perennial, apomictic tetraploid forage species, native in the state of Rio Grande do Sul, Brazil, with grazing tolerance and adapted to sandy soils and moderate droughts. As a first step to future breeding, a morphological characterization regarding leaf hairiness, sheath, leaf and central venation color, growing habit, plant height, raceme number and length, and leaf length and width was performed in 53 accessions from Rio Grande do Sul that are part of a Paspalum species breeding program. 35.84% of the accessions had completely hairy leaves, 73.58% had green sheath, 54.71% whitish central venation, 50.94% decumbent habit. Leaf color was estimated by two methods, color chart and colorimeter. The accessions were classified as 76.92% green, 13.45% greenish yellow and 9.62% as grayish green by the first, and 59.62% grayish, 32.69% grayish yellow, 5.77% yellow and 1.92% dark grayish by the second method. Raceme length ranged from 9.40 to 1.30 cm, number of racemes from one to six (48.73% of the accessions had four racemes), leaf length and width from 36.13 to 13.06 cm and 0.67 to 0.36 cm, respectively, and plant height from 115.70 to 29.00 cm. Therefore, a large morphological variation among accessions was detected, with no relation to geographical location but indicating a high potential use in plant breeding programs.

scholarly journals ALTURA DE PLANTAS E DIÂMETRO DE COLMOS DE SORGO FORRAGEIRO IRRIGADO EM FUNÇÃO DE CORTES

Irriga ◽  
2020 ◽  
Vol 25 (2) ◽  
pp. 223-233
Author(s):  
Jardel Henrique Kirchner ◽  
Adroaldo Dias Robaina ◽  
Marcia Xavier Peiter ◽  
Rogério Ricalde Torres ◽  
Wellington Mezzomo ◽  
...  
Keyword(s):  
Plant Height ◽  
Block Design ◽  
Rio Grande ◽  
Stem Diameter ◽  
Rio Grande Do Sul ◽  
Pasture Production ◽  
Randomized Block Design ◽  
Water Conditions ◽  
Cattle Herds ◽  
Santa Maria

ALTURA DE PLANTAS E DIÂMETRO DE COLMOS DE SORGO FORRAGEIRO IRRIGADO EM FUNÇÃO DE CORTES     JARDEL HENRIQUE KIRCHNER1; ADROALDO DIAS ROBAINA2; MARCIA XAVIER PEITER3; ROGÉRIO RICALDE TORRES4; WELLINGTON MEZZOMO5 E RICARDO BENETTI ROSSO6   1 Eng. Agrônomo, Doutor, Professor do Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul, Rua Nelsi Ribas Fritsch, nº 1111, bairro Esperança, Ibirubá, RS, Brasil, CEP: 98200-000, [email protected]. 2  Eng. Agrônomo, Doutor, Professor Titular do Departamento de Engenharia Rural, UFSM, Avenida Roraima, nº 1000, bairro Camobi, Santa Maria, RS, Brasil, CEP: 97195-000, [email protected]. 3 Eng. Agrônoma, Doutora, Professora Associada do Departamento de Engenharia Rural, UFSM, Avenida Roraima, nº 1000, bairro Camobi, Santa Maria, RS, Brasil, CEP: 97195-000, [email protected]. 4 Eng. Agrônomo, Doutor, Professor do Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul, Rua Eng. João Viterbo de Oliveira, nº 3061, Zona Rural, Vacaria, RS, Brasil, CEP: 95219-899, [email protected]. 5 Eng. Agrônomo, Mestre, Doutorando no Programa de Pós-Graduação em Engenharia Agrícola, UFSM, Avenida Roraima, nº 1000, bairro Camobi, Santa Maria, RS, Brasil, CEP: 97195-000, [email protected]. 6 Eng. Agrônomo, Doutor, Professor no Instituto Federal Catarinense, Rodovia SC 283 - km 17, Concórdia, SC, Brasil, CEP: 89703-720, ricardo.rosso @ifc.edu.br.      1 RESUMO   A obtenção de elevadas produtividades de pastagens é essencial para a manutenção dos níveis alimentares de rebanhos bovinos. A altura de plantas e o diâmetro de colmos caracterizam-se como determinantes no sucesso produtivo da pastagem pela quantidade de massa produzida. Um dos fatores que alteram esses índices são as precipitações irregulares, tornando necessária a reposição da demanda através da irrigação. O objetivo do trabalho foi avaliar o diâmetro de colmos e a altura de plantas sob diferentes condições hídricas e cortes no sorgo forrageiro, em dois anos agrícolas no estado do Rio Grande do Sul. Foram conduzidos dois experimentos nos anos agrícolas de 2015/2016 e 2016/2017 em Santa Maria (RS), e foram avaliadas as alturas de plantas e os diâmetros de colmos em seis condições hídricas (não irrigado, 25, 50, 75, 100 e 125 % da ETo), em três períodos de cortes (50, 80 e 110 dias após a semeadura) em delineamento blocos ao acaso. Foram encontradas diferenças estatisticamente significativas para a variação da altura de plantas e também do diâmetro de colmos, tanto conforme a lâmina de irrigação, quanto na sequência de cortes.   Palavras chave: pastagem irrigada, capacidade de rebrote, irrigação.     KIRCHNER, J. H.; ROBAINA, A. D.; PEITER, M. X.; TORRES, R. R.; MEZZOMO, W.; ROSSO, R. B. HEIGHT OF PLANTS AND DIAMETER OF STEMS OF SORGHUM FORAGE IRRIGATED BY CUTS         2 ABSTRACT   Achieving high pasture yields is essential for maintaining feed levels in cattle herds. Plant height and stem diameter are determinants of pasture production success by the amount of mass produced. One of the factors that change these rates is irregular rainfall, making it necessary to replenish demand through irrigation. The objective of this work was to evaluate stem diameter and plant height under different water conditions and forage sorghum cuts in two agricultural years in the state of Rio Grande do Sul. Two experiments were conducted in the agricultural years of 2015/2016 and 2016/2017 in Santa Maria / RS, and plant heights and stem diameters were evaluated in six water conditions (non-irrigated, 25, 50, 75, 100 and 125% of ETo), in three cutting periods (50, 80 and 110 days after sowing) in a randomized block design. Statistically significant differences were found for plant height and stem diameter variation, both according to irrigation depth and cut sequence.   Keywords: irrigated pasture, regrowth capacity, irrigation.

scholarly journals Reptiles of the Parque Estadual de Itapuã, state of Rio Grande do Sul, southern Brazil

Check List ◽  
2012 ◽  
Vol 8 (5) ◽  
pp. 847 ◽  
Author(s):  
Gilberto Alves de Souza Filho ◽  
Laura Verrastro
Keyword(s):  
Rio Grande ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Conservation Unit ◽  
Pampa Biome

Herein we provide a list of reptiles from Parque Estadual de Itapuã, a conservation unit of integral protection located in the municipality of Viamão, state of Rio Grande do Sul, southern Brazil and inserted in the domains of the Pampa Biome. The study was carried out from February 2003 to July 2004. We recorded 39 species: 23 snakes, eight lizards, four testudines, three amphisbaenians and one crocodilian. Through the knowledge of the species in the area, we justify the importance of preserving this important natural remnant.

scholarly journals Plant growth and physiological quality of quinoa (Chenopodium quinoa Willd) seeds grown in Southern Rio Grande do Sul, Brazil

2019 ◽  
pp. 678-682
Author(s):  
Rafael De Oliveira Vergara ◽  
Andréa Bicca Noguez Martins ◽  
Tiago Pedó ◽  
Aline Klug Radke ◽  
Gizele Ingrid Gadotti ◽  
...  
Keyword(s):  
Dry Matter ◽  
Chenopodium Quinoa ◽  
Rio Grande ◽  
Temperate Climate ◽  
Initial Growth ◽  
Breeding Line ◽  
Rio Grande Do Sul ◽  
Area Index ◽  
Physiological Quality

Quinoa (Chenopodium quinoa Willd) an annual grain crop belonging to the Amaranthacea family is the only vegetable food that contains all essential amino acids, micronutrients and vitamins. The study aimed to evaluate the performance, growth and seed physiological quality of two genotypes of quinoa in Southern Rio Grande do Sul region. The cultivar BRS Piabiru and one breeding line were grown at green house. The design was completely randomized with four replications and five harvest times during the vegetative stage of the crop. The variables were shoot length, number of leaves, leaf area index, dry matter of aerial parts, dry matter of root and total dry matter of plant. It was concluded that the line and BRS Piabiru have slow initial growth in the first 30 days and strong growth up to 120 days. The breeding line and commercial cultivar showed the same potential for seed production in the temperate climate of this region.

scholarly journals Preliminary dragonfly (Odonata) species list from the Pampa biome in Rio Grande do Sul, Brazil, with ecological notes for 19 new records for the State

2017 ◽  
Vol 17 (4) ◽  
Author(s):  
Samuel Renner ◽  
Eduardo Périco ◽  
Gerson Júnior Ely ◽  
Göran Sahlén
Keyword(s):  
Rio Grande ◽  
The State ◽  
Water Bodies ◽  
Rio Grande Do Sul ◽  
Species List ◽  
Surrounding Water ◽  
Pampa Biome ◽  
Small Streams ◽  
Biogeographical Region ◽  
Southern Half

Abstract An inventory of Odonata was carried out in the southern half of the state of Rio Grande do Sul, Brazil, in the Pampa biome. Originally, this biogeographical region was covered mostly by open fields and grassland, with sections of higher vegetation surrounding water bodies and rocky hills. Today the landscape is fragmented due to agricultural activities, mainly cattle farming, rice crops and forest plantations. Our survey was conducted in three municipalities from this region, between March 2015 and April 2016. Aiming at a general overview of the species composition, our sampling sites were selected on a wide basis, including lakes, bogs, temporary water bodies, small streams and river sections. Eighty two species of Odonata were collected comprising 40 genera and seven families. The dominant families were Libellulidae (56,1%), Coenagrionidae (24,5%) and Aeshnidae (7,3%). We found a diverse odonate assemblage, adding 19 new species records for the state of Rio Grande do Sul.

scholarly journals Split nitrogen application in potato: effects on accumulation of nitrogen and dry matter in the crop and on the soil nitrogen budget

1999 ◽  
Vol 133 (3) ◽  
pp. 263-274 ◽  
Author(s):  
J. VOS
Keyword(s):  
Dry Matter ◽  
N Recovery ◽  
Separate Analysis ◽  
Soil Mineral N ◽  
Soil Mineral ◽  
Mineral N ◽  
N Application ◽  
N Content ◽  
Total N ◽  
N Utilization

In four field experiments, the effects of single nitrogen (N) applications at planting on yield and nitrogen uptake of potato (Solanum tuberosum L.) was compared with two or three split applications. The total amount of N applied was an experimental factor in three of the experiments. In two experiments, sequential observations were made during the growing season. Generally, splitting applications (up to 58 days after emergence) did not affect dry matter (DM) yield at maturity and tended to result in slightly lower DM concentration of tubers, whereas it slightly improved the utilization of nitrogen. Maximum haulm dry weight and N content were lower when less nitrogen was applied during the first 50 days after emergence (DAE). The crops absorbed little extra nitrogen after 60 DAE (except when three applications were given). Soil mineral N (0–60 cm) during the first month reflected the pattern of N application with values up to 27 g/m2 N. After 60 DAE, soil mineral N was always around 2–5 g/m2. The efficiency of N utilization, i.e. the ratio of the N content of the crop to total N available (initial soil mineral N+deposition+net mineralization) was 0·45 for unfertilized controls. The utilization of fertilizer N (i.e. the apparent N recovery) was generally somewhat improved by split applications, but declined with the total amount of N applied (range 0·48–0·72). N utilization and its complement, possible N loss, were similar for both experiments with sequential observations. Separate analysis of the movement of Br− indicated that some nitrate can be washed below 60 cm soil depth due to dispersion during rainfall. The current study showed that the time when N application can be adjusted to meet estimated requirements extends to (at least) 60 days after emergence. That period of time can be exploited to match the N application to the actual crop requirement as it changes during that period.

scholarly journals Semiaquatic bugs (Hemiptera, Heteroptera, Gerromorpha) from Rio Grande do Sul, southern Brazil

Check List ◽  
2021 ◽  
Vol 17 (5) ◽  
pp. 1323-1343
Author(s):  
Juliana Mourão dos Santos Rodrigues ◽  
Oséias Martins Magalhães ◽  
Evaldo Alves Joaquim Júnior ◽  
José Ricardo Inacio Ribeiro ◽  
Felipe Ferraz Figueiredo Moreira
Keyword(s):  
Atlantic Forest ◽  
New Records ◽  
Rio Grande ◽  
The State ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Pampa Biome ◽  
First Time

Rio Grande do Sul (RS) is the southernmost state in Brazil and includes areas within the Pampa and Atlantic Forest biomes. The semiaquatic bugs (Hemiptera, Heteroptera, Gerromorpha) from RS are poorly known, with only 14 previously recorded species. We carried out two expeditions in this state, in 2002 and 2019, across 19 municipalities. Here, we provide new records for 19 species, of which 13 are recorded for the first time from the state, five have their distributions expanded, and one is recorded again from a same locality previously reported in the literature. Furthermore, 13 species were collected for the first time in the Pampa biome and one in the Atlantic Forest.

scholarly journals Genotype x environment interaction of agronomic and processing quality traits in potato

2012 ◽  
Vol 30 (1) ◽  
pp. 84-90 ◽  
Author(s):  
Lizete Augustin ◽  
Sandra Milach ◽  
Dilson Antônio Bisognin ◽  
Marilei Suzin
Keyword(s):  
Dry Matter ◽  
Rio Grande ◽  
Chip Color ◽  
Genotype X Environment Interaction ◽  
Environment Interaction ◽  
Quality Traits ◽  
Processing Quality ◽  
Rio Grande Do Sul ◽  
Genotype X Environment ◽  
Growing Seasons

At the main crop production region of Rio Grande do Sul state, Brazil, potato is cultivated in two different growing seasons: autumn and spring. The objectives of this research paper were: i) identify potato clones with high yield potential and industrial quality for Autumn and Spring growing seasons in the northern/northeastern region of the state; ii) estimate the effects of environment and of the genotype x environment interaction on the expression of agronomic and processing quality traits of potato clones in order to determine the appropriate strategy for breeding potato for the target region. One hundred and seventy clones of nine families were developed and compared to the cultivars Atlantic, Baronesa, Catucha, Ciclamen, Hertha, Lady Roseta, Macaca, Monalisa and Vivaldi and to the clone SMIJ 461-1, in the autumn and spring of 2006, in Passo Fundo, northern Rio Grande do Sul state. The evaluated traits included number of tubers per plant, tuber weight, plant yield, presence of deep eyes, dry matter content and chip color. Genotype x environment interaction (G x E) was significant for the expression of all traits but processing quality traits like chip color were most influenced by the growing season conditions. Genetic potential expression for yield traits was maximized in the spring season. Superior clones combining agronomic and quality traits were identified at the two growing seasons. High correlation between the two growing seasons was observed for the presence of deep eyes and dry matter, indicating they can be selected at either season.

scholarly journals Erros potenciais na estimativa da mineralização do nitrogênio do solo

1997 ◽  
Vol 27 (1) ◽  
pp. 151-152 ◽  
Author(s):  
FIávio Anastácio de Oliveira Camargo ◽  
Clesio Gianello ◽  
Caio Vidor
Keyword(s):  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Mineral N

Avaliou-se a ocorrência de N-orgânico solúvel em experimentos para estimativa da mineralização do nitrogénio de dez solos do Rio Grande do Sul. Foi utilizado o procedimento incubação-lixrviação e extração com CaCI2 0,01 mol L-1, onde foi determinado a concentração de N-mineral, N-total e N-orgânico solúvel no extraio. Constatou-se que a lixiviação periódica do solo retira porção considerável de N-orgânico solúvel e assim subestimando a estimativa da mineralização do nitrogénio do solo.

Sign in / Sign up

Export Citation Format

Share Document