scholarly journals Wheat yield in the Cerrado as affected by nitrogen fertilization and inoculation with Azospirillum brasilense

2017 ◽  
Vol 52 (9) ◽  
pp. 794-805 ◽  
Author(s):  
Fernando Shintate Galindo ◽  
Marcelo Carvalho Minhoto Teixeira Filho ◽  
Salatiér Buzetti ◽  
José Mateus Kondo Santini ◽  
Cleiton José Alves ◽  
...  
Keyword(s):  
Grain Yield ◽  
Azospirillum Brasilense ◽  
Wheat Yield ◽  
Urease Inhibitor ◽  
N Accumulation ◽  
Leaf Chlorophyll ◽  
Spike Number ◽  
Tillage System ◽  
Irrigated Wheat ◽  
N Rates

Abstract: The objective of this work was to evaluate the effect of inoculation with Azospirillum brasilense, associated with N rates and sources, in soil of the Cerrado (Brazilian savanna), on the grain yield of irrigated wheat (Triticum aestivum). The experiment was carried out under a no-tillage system in a Typic Haplustox. The experimental design was randomized complete blocks with four replicates, in a 2x5x2 factorial arrangement: two N sources (urea and urea with NBPT urease inhibitor); five N rates applied as topdressing (0, 50, 100, 150, and 200 kg ha-1); and with or without seed inoculation with A.brasilense. The increase in the N rates positively affected spike length, number of spikelets and of grains per spike, number of spikes per meter, N accumulation in the straw, leaf chlorophyll content, and grain yield of irrigated wheat, regardless of the use of NBPT urease inhibitor with conventional urea. Singly, inoculation with A.brasilense does not affect production components and grain yield, despite the increase in N content in wheat straw. The inoculation with A.brasilense, associated with the application of 140 kg ha-1 N, provides the highest grain yield of irrigated wheat cropped after corn in low-altitude Cerrado.

scholarly journals Irrigated wheat subjected to inoculation with Azospirillum brasilense and nitrogen doses as top-dressing

2017 ◽  
Vol 21 (8) ◽  
pp. 537-542 ◽  
Author(s):  
Cleiton J. Alves ◽  
Orivaldo Arf ◽  
Ane F. Ramos ◽  
Fernando S. Galindo ◽  
Lais M. Nogueira ◽  
...  
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Azospirillum Brasilense ◽  
Wheat Cultivar ◽  
Wheat Crop ◽  
Mato Grosso ◽  
Spike Number ◽  
Irrigated Wheat ◽  
Leaf N Content ◽  
Mato Grosso Do Sul

ABSTRACT The use of Azospirillum brasilense in the wheat crop still presents contradictory results; thus, it is necessary to identify ideal conditions to obtain satisfactory results. The objective of this study was to investigate the interaction between Azospirillum brasilense and nitrogen doses in a wheat cultivar, conducted with irrigation in the Cerrado region of Mato Grosso do Sul. The experimental design was randomized blocks with a 4 x 2 factorial scheme, four nitrogen doses (0, 40, 80 and 120 kg ha-1) applied as top-dressing, associated or not with inoculation of wheat seeds with Azospirillum brasilense. The results show that there was no interaction between N and inoculation. The isolated effect of Azospirillum brasilense promotes an increase in plant height and number of grains per spike. Nitrogen doses promotes significant increases in leaf N content, plant height, number of grains per spike, number of spikes per square meter and grain yield. The conditions under which the experiment was conducted favored the development of the crop, not interfering with grain yield due the inoculation with Azospirillum brasilense.

Time of nitrogen application affects nitrogen use efficiency of wheat in the humid pampas of Argentina

2008 ◽  
Vol 88 (5) ◽  
pp. 849-857 ◽  
Author(s):  
P. A. Barbieri ◽  
H. S. Rozas ◽  
H. E. Echeverría
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
N Recovery ◽  
The South ◽  
N Accumulation ◽  
Nitrogen Use ◽  
Leaching Losses ◽  
South Eastern ◽  
Use Efficiency ◽  
N Rates

Nitrogen (N) fertilization is an important management practice to increased grain yield; however, it is imperative to increase nitrogen use efficiency (NUE) in order to diminish risks of environmental pollution. The objective of this study was to determine the effect of fertilization times on wheat grain yield, grain N accumulation and grain N recovery efficiency (RE) in different sites and years at the south-eastern wheat belt of the Pampas. The experiments were a factorial combination of N rates and fertilization times (sowing and tillering). Grain yield ranged from 1600 to 7900 kg ha-1 and fertilization at tillering increased grain yield compared with fertilization at sowing (5465 vs. 5110 kg ha-1), similar behavior was observed for grain N accumulation (95 vs. 86 kg ha-1) and RE (0.41 vs. 0.32). Predicted grain yield by CERES-Wheat model for different N rates and fertilization times was correlated with observed grain yield (r2 = 0.71). While fertilization at tillering significantly increased grain yield, CERES-Wheat model estimated nitrate leaching losses that ranged from 12 to 62 kg N ha-1 and from 7 to 16 kg N ha-1 for fertilization at sowing and tillering, respectively. However, denitrification losses ranged from 1.2 to 3.9 and from 0.5 to 2.4 kg N ha-1 for fertilization at sowing and tillering, respectively. Leaching losses for fertilization at sowing are a consequence of water excess early in the growing season and would be the main N loss factor. Therefore, N application at tillering is an appropriate strategy to improve NUE in the south-eastern wheat belt of the Pampas. Key words: Wheat, fertilization time, nitrogen use efficiency, N losses, CERES-Wheat

scholarly journals RESPONS OF BREAD WHEAT YIELD AND IT,S COMPONENTS TO BORON AND VITAMIN C FOLIAR APPLIED

2016 ◽  
Vol 47 (5) ◽  
Author(s):  
Al-Hilfy & Zeboon
Keyword(s):  
Vitamin C ◽  
Grain Yield ◽  
Bread Wheat ◽  
Yield Components ◽  
Wheat Yield ◽  
Triticum Aestivum L ◽  
College Of Agriculture ◽  
Field Crops ◽  
Two Factors ◽  
Spike Number

Field experiment was conducted during 2010 – 2011 and 2011 – 2012 winter seasons at the Experimental Farm, Department of Field Crops, College of Agriculture University of Baghdad. RCBD design with four replications were used to study the effect of Boron and vitamin C foliar applied on yield and some it,s components of bread  wheat Triticum aestivum L. cv. Abu – Ghraib-3. The experiment involved two factors ,the first was boron foliar in five concentrations  0,100, 200, 300, 400 mg L-1  the second was vitamin C foliar applied in five concentrations 0,1,2,3,4, gmL-1 at booting stage. Results of the experiment showed :300 mg B L-1 was  superior in grain yield 6.726,6.771 Mg ha-1)   for both seasons and some yield components ( spike number for the second season 574.9 spike m-2 , fertility 97.27% 97.34% and number of grain 66.39 , 65,22 grain spik-1 ) for both seasons . Foliar of Vitamin C with 4 gm L-1 was significantly affected grain yield (6.820 , 6.879 Mg ha-1 ) for both seasons respectively . Foliar of Vitamin C with 4 gm L-1 was significantly affected on grain yield and some it,s components (6.820 , 6.878 Mg ha-1 ) as compared to control which gave (4.882 ,4.906 Mg ha-1) for both seasons, respectively .The interaction between two factors was significant in some characters ( number of spike and grain yield ).

scholarly journals LOSSES IN WHEAT CROP AS A FUNCTION OF THE WATER CONTENT OF THE GRAINS AT HARVEST

2018 ◽  
Vol 93 (2) ◽  
pp. 138
Author(s):  
Fernando Shintate Galindo ◽  
João Luis Zocoler ◽  
Marcelo Carvalho Minhoto Teixeira Filho ◽  
Salatiér Buzetti ◽  
José Mateus Kondo Santini ◽  
...  
Keyword(s):  
Grain Yield ◽  
Water Content ◽  
Mass Number ◽  
Wheat Yield ◽  
Water Levels ◽  
Wheat Crop ◽  
Physiological Maturity ◽  
Spike Number ◽  
Harvest Moisture ◽  
Natural Drying

The objective was to study the harvest point for the wheat crop, associated maximum grain yield and productive components with different harvest moisture and losses on natural drying in the field with different water levels in grain. The treatments consisted of the following crop moisture levels (on wet basis) of the grains: 27.9 (point of full physiological maturity), 22.6; 19.9; 18.1; 15; and 12.9%, evaluating the number of spikelets per spike, number of voids grains, number of grains per spike and per spikelet, percentage of lodging, thousand grain mass, number of ears per meter, hectoliter mass, and yield. The largest wheat yield was obtained with the grain harvest at physiological maturity point, decreasing linearly until natural drying to 13% (on a wet basis).

scholarly journals Technical and economic viability of cowpea co-inoculated with Azospirillum brasilense and Bradyrhizobium spp. and nitrogen doses

2020 ◽  
Vol 24 (5) ◽  
pp. 304-311
Author(s):  
Fernando S. Galindo ◽  
Marcelo C. M. Teixeira Filho ◽  
Edson C. da Silva ◽  
Salatiér Buzetti ◽  
Guilherme C. Fernandes ◽  
...  
Keyword(s):  
Grain Yield ◽  
Azospirillum Brasilense ◽  
Block Design ◽  
Operating Cost ◽  
Cost Effective ◽  
Economic Viability ◽  
Operating Profit ◽  
Randomized Block Design ◽  
Tillage System ◽  
Bradyrhizobium Spp

ABSTRACT Biological nitrogen fixation efficiency can be increased by co-inoculation with Bradyrhizobium spp. and Azospirillum brasilense, allowing even greater uptake of water and nutrients, leading to higher yields and enabling the insertion of unusual crops, such as cowpea (Vigna unguiculata L. Walp.), in the agricultural production system in the Cerrado region of Brazil. Thus, this study aimed to evaluate the technical and economic viability of cowpea in the Cerrado region, as a function of N doses and co-inoculation of seeds with Azospirillum brasilense and Bradyrhizobium. The study was carried out in a no-tillage system in Selvíria, MS, Brazil. The experimental design was a randomized block design, with four repetitions, arranged in a 3 x 5 factorial scheme, corresponding to three types of inoculation (without inoculation - control, with two strains of Bradyrhizobium spp. SEMIA 6462 and SEMIA 6463 - the conventional inoculation of cowpea, and these two strains of Bradyrhizobium spp. plus A. brasilense strains Ab-V5 and Ab-V6); and five N doses (0, 20, 40, 80 and 160 kg ha-1), as urea, applied as topdressing. The following evaluations were performed: grain yield, total operating cost, effective operating cost, gross revenue, operating profit, profitability index, equilibrium price and equilibrium yield. Co-inoculation with A. brasilense increases cowpea grain yield, which makes cowpea production in the Cerrado region of Brazil technically and economically viable, without the need to apply N fertilizers in topdressing.

scholarly journals Azospirillum Brasilense And Zinc Rates Affecting Fungal Root Colonization and Yield of Cereal Crops in Succession Under Brazilian Cerrado Conditions

2021 ◽  
Author(s):  
Philippe Solano Toledo Silva ◽  
Ana Maria Rodrigues Cassiolato ◽  
Fernando Shintate Galindo ◽  
Arshad Jalal ◽  
Thiago Assis Rodrigues Nogueira ◽  
...  
Keyword(s):  
Grain Yield ◽  
Mycorrhizal Fungi ◽  
Azospirillum Brasilense ◽  
Root Colonization ◽  
Block Design ◽  
Wheat Yield ◽  
Arbuscular Mycorrhizal ◽  
Symbiotic Association ◽  
Brazilian Cerrado ◽  
Randomized Block Design

Abstract Soil and plant beneficial microbes capitalize plant nutrition through successful colonization in roots rhizosphere which could sustainably increase cereal production. Zinc (Zn) is intensively reported a deficient nutrient for maize and wheat production in Brazilian Cerrado, which could be sustainably managed by beneficial microorganisms and their symbiotic association with other microorganisms like arbuscular mycorrhizal fungi (AMF) and dark septate endophytes (DSE). The objective of this study was to evaluate the effect of Azospirillum brasilense inoculation and residual Zn rates on root colonization and grain yield of maize and wheat in succession under Brazilian Cerrado conditions. These experiments were conducted in a randomized block design with four replications and arranged in a 5x2 factorial scheme. The treatments were consisted of five Zn rates (0, 2, 4, 6 and 8 kg ha-1) applied from zinc sulfate in maize and residual on wheat, and without and with seed inoculation of A. brasilense. Both crops were evaluated for root colonization of AMF and DSE, number of spores of AMF, quantification of CO2-C and grain yield. Colonization by AMF and DSE were significantly increased with interaction of Zn rates and inoculation treatments. The inoculation of A. brasilense favored root AMF and DSE colonization while increasing Zn rates by 4 kg ha-1 for maize and while 2 and 4 kg ha-1 Zn in residual for wheat reduced these colonizations. The inoculation did not influence spore production and CO2-C in both crops while maize-wheat yield were increased with Zn rates up to 4 kg ha-1 in edaphoclimatic condition of Brazilian Cerrado.

scholarly journals Inoculation With Growth-Promoting Bacteria Azospirillum brasilense and Its Effects on Productivity and Nutritional Accumulation of Wheat Cultivars

2020 ◽  
Vol 4 ◽  
Author(s):  
Eduardo Henrique Marcandalli Boleta ◽  
Fernando Shintate Galindo ◽  
Arshad Jalal ◽  
José Mateus Kondo Santini ◽  
William Lima Rodrigues ◽  
...  
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Azospirillum Brasilense ◽  
Agricultural Practices ◽  
Mineral Fertilizers ◽  
Wheat Cultivars ◽  
Tillage System ◽  
Promote Plant Growth ◽  
Global Population ◽  
Potential Use

Agricultural practices that allow a productive increase in a sustainable manner are becoming increasingly necessary to feed an ever-growing global population. The inoculation with Azospirillum brasilense has the potential to reduce the use of synthetic mineral fertilizers with efficient capacity to promote plant growth and increase nutrition. Therefore, this research was developed to investigate the potential use of A. brasilense to increase the accumulation of macro- and micronutrients and its influence on grain yield, plant height, and spike population in two wheat cultivars (CD1104 and CD150), under irrigated conditions in the Brazilian Cerrado. The study was carried out in a Rhodic Hapludox under a no-tillage system. The experiment was designed in randomized blocks with six replications, arranged in a 2 × 2 factorial scheme: two cultivars (CD150 and CD1104) and two levels of inoculation (control and with A. brasilense). The inoculation with A. brasilense provided greater accumulation of micronutrients in the aerial part of the wheat. In the cultivar CD1104, B and Cu had an accumulation 27.7 and 57.4% higher compared with those of the control without bacteria. In the cultivar CD150, Azospirillum increased the accumulation of B, Fe, and Mn by 43.8, 49.9, and 22%, respectively, and reduced Cu by 21.9%, compared with those of the control. The cultivar CD150 has greater efficiency to accumulate N (+35.5 kg N ha−1) as compared with the cultivar CD1104. Interactions between inoculation and cultivars resulted in greater accumulation of S and K in the shoot of the wheat cultivar CD150, as well greater accumulation of Cu in CD1104. In growth assessments, inoculation or cultivars did not statistically influence wheat grain yield and spike population. Howevere, for plant height, the CD1104 genotype has 13.1% bigger plant height on average than that of the CD150 genotype. Inoculation can contribute more sustainably to wheat nutrition.

scholarly journals Winter wheat agronomic traits and nitrate leaching under variable nitrogen fertilization

2014 ◽  
Vol 60 (No. 9) ◽  
pp. 394-400 ◽  
Author(s):  
I. Sestak ◽  
M. Mesic ◽  
Z. Zgorelec ◽  
I. Kisic ◽  
F. Basic
Keyword(s):  
Winter Wheat ◽  
Grain Yield ◽  
Agronomic Traits ◽  
Wheat Yield ◽  
Triticum Aestivum L ◽  
Climatic Conditions ◽  
N Leaching ◽  
N Availability ◽  
Mineral N ◽  
N Rates

In the long-term field trial on an arable dystric Stagnosols, winter wheat (Triticum aestivum L.) grain yield, nitrogen use efficiency (NUE) and nitrate nitrogen (NO<sub>3</sub><sup>&ndash;</sup>-N) in lysimeter water were compared under treatments of 0, 100, 150, 200, 250 and 300 kg/ha of mineral nitrogen (N) during the growth years 1996/97, 1999/00, 2002/03 and 2005/06. Year properties significantly influenced N availability resulting in different responses of grain yield and NUE under variable treatments. Grain yield showed strong significant correlation with the rainfall accumulated from March to May (r = 0.77). In the case of a dry year 2003, winter wheat yield and NUE were adversely influenced by unfavourable climatic conditions. The optimal response of yield and NUE to increasing mineral N rates was found at the amount of 150&ndash;200 kg N/ha. Very strong significant correlation between the total amount of leached NO<sub>3</sub><sup>&ndash;</sup>-N and NUE was found for periods 1999/00 and 2005/06 where, in terms of increasing N levels, lower NUE conditioned higher NO<sub>3</sub><sup>&ndash;</sup>-N leaching (r = 0.91 and r = 0.94, respectively). According to the shallow depth of groundwater and installation of drainage systems, there is still a risk of freshwater contamination by nitrates if the N rates higher than 200 kg/ha were applied.

scholarly journals Nitrogen translocation in wheat inoculated with Azospirillum and fertilized with nitrogen

2000 ◽  
Vol 35 (7) ◽  
pp. 1473-1481 ◽  
Author(s):  
OSMAR RODRIGUES ◽  
AGOSTINHO DIRCEU DIDONET ◽  
JORGE A. GOUVEIA ◽  
RITA DE CÁSSIA SOARES
Keyword(s):  
Grain Yield ◽  
Plant Material ◽  
Azospirillum Brasilense ◽  
Significant Contribution ◽  
N Uptake ◽  
Triticum Aestivum L ◽  
Sowing Time ◽  
N Content ◽  
N Rates ◽  
Wheat Seeds

The productivity and the translocation of assimilates and nitrogen (N) were compared after inoculation of wheat (Triticum aestivum L., cv. BR-23) seeds with two strains of Azospirillum brasilense (strains 245 and JA 04) under field conditions. The inoculation of wheat seeds was done with a peat inoculant at sowing time. Plant material for evaluations were collected at anthesis and maturity. No differences in grain yield and in the translocation of assimilates resulting from inoculation were detected. Differences were observed in relation to N rates (0, 15, and 60 kg ha-1). N content in the grain increased significantly in the bacteria-inoculated treatments in which N was not added. This increase in N content in the grain with inoculation was probably due to higher N uptake after anthesis without any significant contribution on the grain yield. Such increment was of 8.4 kg ha-1 of N representing 66% more N than in no inoculated treatment. Regardless of the inoculation and the rate of N applied, it was observed that about 70% of the N accumulated at anthesis was translocated from vegetative parts to the grain.

scholarly journals Genotype x environment interaction analysis of Triticum aestivum L. for yield components

2020 ◽  
Vol 12 (1) ◽  
pp. 6-12
Author(s):  
İ. Öztürk ◽  
K.Z. Korkut
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Agricultural Research ◽  
Interaction Analysis ◽  
Wheat Yield ◽  
Stress Factors ◽  
Spike Length ◽  
Environment Interaction ◽  
Spike Number ◽  
Biological Yield

Abstract. Genotypes performance changes due to environmental pressures or stresses and differences in their ability to adapt to the stress factors. Drought is the main abiotic stress factor affecting bread wheat yield and yield component. The experiment was carried out in the experimental field of Trakia Agricultural Research Institute, Edirne (Turkey), in 2008-2009 and 2009-2010, and 15 wheat genotypes were planted in RCBD in a split-plot with three replications. The main plots were assigned to five moisture regimes, which included 3 drought stress environments, one non-stress and one non-treatment environment. Principal component analysis (PCA) and cluster analysis were used to determine genotypes environment interaction. Grain yield, biological yield, harvest index, spike number per square meter, kernel and spikelet number per spike, length of spike and plant height were investigated. PCA indicated that the first (46.31%) and second (25.32%) components justified 71.63% of variations in the investigated yield parameters of the genotypes. Based on GGE biplot results, Kate A-1 and Tekirdağ genotypes were determined as the most stable cultivars for grain yield. Mean values of the genotypes varied between 3830-6583 kg ha-1 for grain yield, 20170-25394 kg ha-1 for biological yield, 68.6-110.9cm for plant height, 30.2-38.3 for kernel number in spike, 328.8-486.6 for spike number per square meter and 6.57-9.17cm for spike length. Clusters I and II were more clearly separated. In the first group of clusters 6 genotypes are located including one line and five cultivars. In the second group of clusters 8 genotypes are located including five advanced lines and four cultivars.

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