Root Distribution, Nutrient Uptake, and Yield of Two Upland Rice Cultivars under Two Water Regimes

2013 ◽  
Vol 105 (1) ◽  
pp. 237-247 ◽  
Author(s):  
C. A. C. Crusciol ◽  
R. P. Soratto ◽  
A. S. Nascente ◽  
O. Arf
Keyword(s):  
Nutrient Uptake ◽  
Root Distribution ◽  
Upland Rice ◽  
Rice Cultivars ◽  
Water Regimes

scholarly journals INFLUENCE OF POTASSIUM LEVELS ON ROOT GROWTH AND NUTRIENT UPTAKE OF UPLAND RICE CULTIVARS

2017 ◽  
Vol 30 (1) ◽  
pp. 32-44 ◽  
Author(s):  
ANTONIO CARLOS DE ALMEIDA CARMEIS FILHO ◽  
◽  
CARLOS ALEXANDRE COSTA CRUSCIOL ◽  
ADRIANO STEPHAN NASCENTE ◽  
MUNIR MAUAD ◽  
...  
Keyword(s):  
Root Growth ◽  
Nutrient Uptake ◽  
Dry Matter ◽  
Upland Rice ◽  
Root Length Density ◽  
Root Diameter ◽  
Regression Equations ◽  
Rice Cultivars ◽  
Randomized Experimental Design ◽  
K Concentration

ABSTRACT Potassium (K) is an essential nutrient for upland rice growth, but little information on the effects of K on root growth and nutrient uptake capacity of upland rice is found. Therefore, an experiment was conducted under greenhouse conditions to evaluate the influence of soil K levels on root growth and nutrient uptake of four upland rice cultivars. A completely randomized experimental design, in a 4x4 factorial scheme (4 levels of K: 20, 40, 80, and 160 mg dm-3; 4 cultivars: Caiapó, BRS-Primavera, IAC-202, and Maravilha) was used, with four replications. Based on regression equations, the highest values of root length density would be found with 136 mg dm-3 of K. The root diameter and dry matter, shoot dry matter and shoot K concentration increased linearly with the increasing K rates. The shoot K concentration of the upland rice cultivars did not differ. The increased level of K in the soil reduced the shoot Ca concentration of intermediate and modern cultivars, and the shoot Mg concentration of all cultivars. The potassium fertilization increased the plant growth, but the magnitude of this effect varied according to the cultivar.

Root Distribution and Nutrient Uptake in Crop-Forage Systems on Andean Hillsides

2004 ◽  
Vol 23 (4) ◽  
pp. 39-50 ◽  
Author(s):  
Q. Zhiping ◽  
I. M. Rao ◽  
J. Ricaurte ◽  
E. Amézquita ◽  
J. I. Sanz ◽  
...  
Keyword(s):  
Nutrient Uptake ◽  
Root Distribution

scholarly journals Competition between drought-tolerant upland rice cultivars and weeds under water stress condition

2013 ◽  
Vol 31 (2) ◽  
pp. 291-302 ◽  
Author(s):  
F.B. Cerqueira ◽  
E.A.L. Erasmo ◽  
J.I.C. Silva ◽  
T.V. Nunes ◽  
G.P. Carvalho ◽  
...  
Keyword(s):  
Water Stress ◽  
Leaf Area ◽  
Stress Condition ◽  
Upland Rice ◽  
Total Concentration ◽  
Dry Weight ◽  
Rice Cultivars ◽  
Drought Tolerant ◽  
Water Stress Condition ◽  
Water Conditions

The objective of this study was to evaluate the competitiveness of two cultivars of upland rice drought-tolerant, cultured in coexistence with weed S. verticillata, under conditions of absence and presence of water stress. The experiment was conducted in a greenhouse at the Experimental Station of the Universidade Federal de Tocantins, Gurupi-TO Campus. The experimental design was completely randomized in a factorial 2 x 2 x 4 with four replications. The treatments consisted of two rice cultivars under two water conditions and four densities. At 57 days after emergence, were evaluated in rice cultivars and weed S. verticillata leaf area, dry weight of roots and shoots and total concentration and depth of roots. Was also evaluated in rice cultivars, plant height and number of tillers. Water stress caused a reduction in leaf area, the concentration of roots and vegetative components of dry matter (APDM, and MSR MST) of rice cultivars and Jatoba Catetão and weed S. verticillata. The competition established by the presence of the weed provided reduction of all vegetative components (MSPA, and MSR MST) of cultivars and Jatoba Catetão. It also decreased the number of tillers, the concentration of roots and leaf area. At the highest level of weed competition with rice cultivars, a greater decrease in vegetative components and leaf area of culture, regardless of water conditions.

scholarly journals Yield performance of upland rice cultivars at different rates and times of nitrogen application

2012 ◽  
Vol 36 (2) ◽  
pp. 475-483 ◽  
Author(s):  
José Hildernando Bezerra Barreto ◽  
Ismail Soares ◽  
José Almeida Pereira ◽  
Antonio Marcos Esmeraldo Bezerra ◽  
José Aridiano Lima de Deus
Keyword(s):  
Upland Rice ◽  
Oryza Sativa L ◽  
Block Design ◽  
N Fertilization ◽  
Rice Cultivars ◽  
Nitrogen Application ◽  
N Application ◽  
Yield Performance ◽  
Randomized Block Design ◽  
N Rates

Nitrogen is the most important nutrient for rice (Oryza sativa L) yields. This study aimed to evaluate the response of upland rice cultivars to N rate and application times in a randomized block design, in subdivided plots with four replications. The studied factors were five rice cultivars (BRS MG Curinga, BRS Monarca, BRS Pepita, BRS Primavera, and BRS Sertaneja), three application times (100 % at planting, 50 % at planting - 50 % at tillering and 100 % at tillering) and four N rates (0, 50, 100, and 150 kg ha-1). All cultivars responded to increased rates and different times of N application, especially BRS Primavera and BRS Sertaneja, which were the most productive when 50 % N rates were applied at sowing and 50 % at tillering. The response of cultivar BRS Monarca to N fertilization was best when 100 % of the fertilizer was applied at tillering.

scholarly journals Brown spot disease severity, yield and yield loss relationships in pigmented upland rice cultivars from East Nusa Tenggara, Indonesia

2020 ◽  
Vol 21 (4) ◽  
Author(s):  
Yosep S. Mau ◽  
Antonius Ndiwa ◽  
Shirly Oematan
Keyword(s):  
Disease Severity ◽  
Yield Loss ◽  
Upland Rice ◽  
Brown Spot ◽  
Yield Reduction ◽  
Rice Cultivars ◽  
Rice Varieties ◽  
Resistance Level ◽  
Spot Disease ◽  
Brown Spot Disease

Abstract. Mau YS, Ndiwa ASS, Oematan SS. 2020. Brown spot disease severity, yield and yield loss relationships in pigmented upland rice cultivars from East Nusa Tenggara, Indonesia. Biodiversitas 21: 1625-1634. Brown spot is one of the most devastating diseases of rice, which could lead to total yield loss. The disease has a worldwide distribution, more specifically in areas where water supply is scarce, most specifically in the dry upland areas. Almost all stages of rice are affected by the disease, where leaves and grains are mostly affected. Considerable differences exist in susceptibility to brown spot among rice varieties, which may cause a large variation in yield loss caused by the disease. Therefore, the resistance level of rice varieties and their yield reduction has to be regularly evaluated and updated. There are only a few reports on the relationship between brown spot severity with yield and yield loss of upland rice, and is even lacking in pigmented upland rice. The objectives of the present study were to assess the brown spot severity and resistance level in pigmented upland rice cultivars from East Nusa Tenggara Province, Indonesia, and to elucidate their relationships with yield and yield reduction. Twenty four pigmented upland rice genotypes were evaluated in the field during May to October 2019, and their disease responses and yields were recorded. Disease severity was observed weekly and used to calculate Area Under the Disease Progress Curve (AUDPC) for comparison among the genotypes. The relationships between disease severity and AUDPC with yield and yield loss were also examined. The results showed significant variation in brown spot severity and AUDPC, ranging from, respectively, 11.11% to 40.70% and 398.42%-days to 1081.30%-days. Yields and yield losses of test genotypes also varied substantially. Yields under diseased-free and diseased plots ranged from, respectively, 2.34 t ha-1 to 6.13 t ha-1 and 1.68 t ha-1 to 3.74 t ha-1 while yield loss was between 10.46% and 56.15%. Six genotypes were moderately resistant, four genotypes were moderately susceptible and 14 genotypes were susceptible to brown spot. Neither disease severity nor AUDPC had a linear relationship with yield but both exhibited positive and linear relationships with yield loss.

scholarly journals Resistance spectra of six elite breeding lines of upland rice to Pyricularia grisea

2003 ◽  
Vol 38 (2) ◽  
pp. 203-210 ◽  
Author(s):  
Anne Sitarama Prabhu ◽  
Emílio da Maia de Castro ◽  
Leila Garcês de Araújo ◽  
Rodrigo Fascin Berni
Keyword(s):  
Resistance Genes ◽  
Rice Blast ◽  
Grain Quality ◽  
Upland Rice ◽  
Pyricularia Grisea ◽  
Rice Cultivars ◽  
Breeding Lines ◽  
Differential Reaction ◽  
Progress Curve ◽  
Elite Breeding Lines

The objective of this work was to evaluate the resistance spectra of six elite breeding lines of rice, developed for improved yield and grain quality, in inoculation tests in the greenhouse and in the field. Forty-six isolates of Pyricularia grisea collected from the cultivar Primavera, 31 from the cultivar Maravilha and 19 from six elite breeding lines, totaling 96 were utilized for inoculations. Out of 11 international and 15 Brazilian pathotypes, IC-1, IB-9, and BD-16, respectively, were identified as most frequent isolates collected from the cultivar Primavera. The isolates retrieved from Maravilha belong to four international and 11 Brazilian pathotypes, the predominant ones being IB-9 and IB-49 and BB-1 and BB-21, respectively. Lines CNAs 8711 and CNAs 8983 showed resistant reaction to all test isolates from Maravilha, while CNAs 8983 was susceptible to three isolates of Primavera pertaining to the pathotype IC-1. A majority of isolates exhibiting compatible reaction to Primavera were incompatible to Maravilha and vice-versa.Field assessment of rice blast utilizing the area under disease progress curve as a criterion for measuring disease severity showed significant differences among the six breeding lines. The isolates of P. grisea exhibiting differential reaction on breeding lines can be utilized in pyramiding resistance genes in new upland rice cultivars.

scholarly journals Bio-Priming Using Indigenous Pseudomonas Fluorescens To Improve Local Upland Rice (Padi Gogo) Production Of Paebiu Kolopua And Pae Wuna Cultivars

2021 ◽  
Vol 2 (5) ◽  
pp. 1885-1899
Author(s):  
Asri Razad ◽  
Gusti Ayu Kade Sutariati ◽  
Tresjia C Rakian ◽  
Jendri Mamangkey ◽  
Marina Silalahi
Keyword(s):  
Pseudomonas Fluorescens ◽  
Rice Plant ◽  
Upland Rice ◽  
Rice Cultivars ◽  
Research Results ◽  
Group Design ◽  
Four Levels

Research was performed to evaluate the effect of biopriming technique using indigenous rhizobacteria in improving local upland rice from Southeast Sulawesi. Randomized group design was applied in this research using factorial pattern consisting of 2 factors. The first factor was upland rice cultivars consisting of 2 (two) levels of Paebiu Kolopua (V1) and Pae Wuna (V2) cultivars. Meanwhile, the second factor was rhizobacteria isolates, consisting of 4 (four) levels, those are without rhizobacteria treatment (R0), KNS11 isolate (R1), KLKU02 isolate (R2) and KNW11 isolate (R3). Research results indicated that interaction between Paebiu Kolopua cultivar and KLKU02 isolate treatment significantly affected plants height with 29.22% improvement and the amount of rice per panicle with 176.33% improvement compared to the control. Therefore, KLKU02 isolate can be recommeded as the best treatment to improve the production and outcome of local upland rice plant.

Cultivar and Weeding Effects on Weeds and Rice Yields in a Degraded Upland Environment of the Coastal Savanna

2011 ◽  
Vol 25 (3) ◽  
pp. 322-329 ◽  
Author(s):  
Amadou Touré ◽  
Jonne Rodenburg ◽  
Kazuki Saito ◽  
Sylvester Oikeh ◽  
Koichi Futakuchi ◽  
...  
Keyword(s):  
West Africa ◽  
Rice Yield ◽  
Upland Rice ◽  
Biomass Accumulation ◽  
Rice Cultivars ◽  
Weed Species ◽  
Weed Growth ◽  
Weed Suppressive Ability ◽  
Rice Yields ◽  
Growing Conditions

Weeds are a major constraint to rice production in labor-limited, upland rice-based systems in West Africa. The effects of weeding regimes and rice cultivars on weed growth and rice yield were investigated at two upland locations (Abomey-Calavi and Niaouli) in the degraded coastal savanna zone of Benin in 2005 and 2006 with below-average rainfall. Four weeding regimes (hoe weeding at 21 d after sowing [DAS], delayed hoe weeding at 31 DAS, hoe weeding at 21 and 42 DAS, and a no weeding control) were the main plot treatments. Cultivars comprising three interspecific upland rice cultivars (NERICA 1, NERICA 2, and NERICA 7) and the parents (Oryza sativaWAB56-104 andO. glaberrimaCG14) were tested in subplots. The most dominant weed species identified were Jamaican crabgrass,Mariscus, and silver spinach. Rice yield was generally low because of drought stress; none of the experiments had a higher mean yield than 1,400 kg ha−1across cultivars. Across cultivars, the best weeding regimes in terms of weed control and rice yields were single weeding at 31 DAS (W31) and double weeding at 21 and 42 DAS (W21+42). Under these weeding regimes, WAB56-104 out-yielded the three NERICA cultivars. CG14 showed the strongest weed suppressive ability (WSA) in Abomey-Calavi but did not have strong WSA in Niaouli because of lower biomass accumulation. WSA of WAB56-104 was similar to that of the three NERICA cultivars. Single weeding at 31 DAS, together with the use of cultivars with good adaptation to unfavorable rice growing conditions, would increase land and labor productivity of upland rice-based systems in West Africa.

scholarly journals Effects of silicon and drought stress on biochemical characteristics of leaves of upland rice cultivars

2016 ◽  
Vol 47 (3) ◽  
pp. 532-539 ◽  
Author(s):  
Munir Mauad ◽  
Carlos Alexandre Costa Crusciol ◽  
Adriano Stephan Nascente ◽  
Hélio Grassi Filho ◽  
Giuseppina Pace Pereira Lima
Keyword(s):  
Drought Stress ◽  
Upland Rice ◽  
Rice Cultivars ◽  
Biochemical Characteristics
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