scholarly journals Yield parameters of maize crop in response to nitrogen fertilization, application of chemical fungicides and inoculation withTrichoderma harzianum

2013 ◽  
Vol 6 (2) ◽  
Author(s):  
Maria de Lourdes Resende ◽  
João Almir de Oliveira ◽  
Maria Leandra Resende Castro ◽  
Flávio Henrique Silveira Rabelo ◽  
Carlos Henrique Silveira Rabelo
Keyword(s):  
Nitrogen Fertilization ◽  
Maize Crop ◽  
Yield Parameters ◽  
Chemical Fungicides

scholarly journals Efficiency in nitrogen management using conventional and transgenic technology in the cultivation of maize

2021 ◽  
Vol 7 ◽  
pp. 1-12
Author(s):  
Ivan Ricardo Carvalho ◽  
Márcio Peter ◽  
Gustavo Henrique Demari ◽  
Francine Lautenchleger ◽  
Filipe Selau Carlos ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilization ◽  
Block Design ◽  
Maize Yield ◽  
Nitrogen Partitioning ◽  
Transgenic Technology ◽  
Maize Crop ◽  
Randomized Block Design ◽  
Genetic Technologies ◽  
Set Up

The objective to evaluate the maize yield components as a function of the top-dressing nitrogen partitioning in maize plants with conventional and transgenic technology. The experiment was carried out in the agricultural crops of 2012/2013 and 2013/2014, in the municipality of Tenente Portela-RS, Brazil. The experiment was set up in a randomized block design in a factorial scheme with two genetic technologies x 11 nitrogen fertilization treatments, arranged in three replications. The treatments were composed of top-dressing applications in the phenological stages V2 - two fully expanded leaves, (V2), V4 - four fully expanded leaves, (V4), V6 - six fully expanded leaves (V6) and V8 - with eight fully expanded leaves (V8) and split applications in V2+V4; V2+V6; V2+V8; V4+V6; V4+V8; V6+V8; and V2+V4+V6+V8. There was interaction between genetic technologies and levels of nitrogen fertilization in the maize crop. The highest grain yield was obtained with conventional technology because it presented plants with greater prolificacy, ear diameter and number of grains per row. Grain yield was superior with nitrogen fertilization in V4 and in nitrogen splitting in the V4 + V6, V4 + V8 and V2 + V4 + V6 + V8 stages.

scholarly journals Effect of Nutrient Management through Target Yield Approach on Uptake and Soil Microflora in Maize – Wheat/Chickpea Sequence Cropping System under Different Tillage Practices

2020 ◽  
pp. 126-137
Author(s):  
K. A. Hiremath ◽  
A. S. Halepyati ◽  
B. M. Dodamani ◽  
M. A. Bellakki ◽  
B. M. Chittapur ◽  
...  
Keyword(s):  
Management Practices ◽  
Nutrient Management ◽  
Conventional Tillage ◽  
Soil Microflora ◽  
Zero Tillage ◽  
Maize Crop ◽  
Tillage Practices ◽  
Yield Parameters ◽  
Target Yield ◽  
Stover Yield

A field trial was carried out during July month of kharif and October month of rabi seasons of 2013-14 and 2014-15 at Agricultural Research Station, Bheemarayanagudi to study the effect of nutrient management through target yield approach on uptake and soil microflora in maize – wheat/chickpea sequence cropping system under different tillage practices. The results indicated that the yield parameters of maize, wheat and chickpea at harvest did not influence due to tillage practices. All these yield parameters were relatively higher in zero tillage with mulch at 5 t ha-1 when compared to conventional tillage. Grain and stover yield of maize did not differ significantly due to different tillage management practices. But, zero tillage with mulch at 5 t ha-1 produced relatively higher yield (65.9 q ha-1) than the zero tillage (64.3 q ha-1) followed by conventional tillage (55.8 q ha-1). The higher organic carbon and soil microflora at different stages were noticed with zero tillage with mulch at 5 t ha-1. The higher available NPK and their uptake by maize crop were also recorded in zero tillage with mulch at 5 t ha-1 followed by zero tillage compared to conventional tillage and zero tillage. The lower available NPK and their uptake by maize crop were recorded in conventional tillage and RDF. Further, due to nutrient management through target yield approach, the yield parameters of maize were differed significantly. Target yield of 10 t ha-1 exhibited significantly higher yield attributes at harvest when compared to other treatments except the targeted yield of 8 t ha-1 and 150% RDF. The lowest values of these attributes were recorded in farmer’s practice of nutrient management followed by RDF. The grain yield and stover yield (69.9 q ha-1and 89.5 q ha-1, respectively) of maize was significantly higher with a targeted yield of 10 t ha-1 followed by targeted yield of 8 t ha-1 and 150% RDF. The lowest grain and stover yield (53.6 q ha-1 and 74.3 q ha-1, respectively) was recorded in farmers practice followed by RDF. Significantly higher soil microflora, available NPK and their uptake by the maize crop was noticed in target yield of 10 t ha-1 followed by targeted yield of 8 t ha-1 and 150% RDF as compared to other treatments. The lowest soil microflora, available nitrogen, phosphorus, and potassium (NPK) and their uptake by the maize was recorded in farmers practice followed by RDF. The same trend was followed statistically for organic carbon due to different treatments. Non significant differences for grain and stover yield of maize was recorded due to interaction of tillage and nutrient management practices. Similar trend was also followed due to interaction of tillage and nutrient management practices for succeeding wheat and chickpea. The yield and yield parameters of wheat and chickpea did not differ due to tillage practices and target yield approaches followed for maize. Maize equivalent yield of wheat and chickpea and system productivity were followed same trend as that of maize yield. Among different tillage practices, zero tillage and zero tillage with mulch at 5 t ha-1 were recorded maximum net returns and higher BC ratio. Similarly, among different nutrient management practices, the target yield of 10 t ha-1 followed by targeted yield of 8 t ha-1 was recorded maximum net returns and higher BC ratio as compare to other treatments.

Regression modeling nitrogen fertilization requirement for maize crop by combining spectral reflectance and agronomic efficiency

2020 ◽  
Vol 43 (14) ◽  
pp. 2152-2163 ◽  
Author(s):  
Cláudio Kapp-Junior ◽  
Eduardo Fávero Caires ◽  
Alaine Margarete Guimarães ◽  
André Carlos Auler
Keyword(s):  
Nitrogen Fertilization ◽  
Spectral Reflectance ◽  
Regression Modeling ◽  
Maize Crop ◽  
Agronomic Efficiency

scholarly journals Maize Response to Nitrogen: Timing, Leaf Variables and Grain Yield

2016 ◽  
Vol 9 (1) ◽  
pp. 85 ◽  
Author(s):  
Adilson Nunes da Silva ◽  
Evandro Luiz Schoninger ◽  
Paulo Cesar Ocheuze Trivelin ◽  
Durval Dourado-Neto ◽  
Victor Meriguetti Pinto ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilization ◽  
N Uptake ◽  
Total Biomass ◽  
Carotenoid Pigment ◽  
Nitrogen Application ◽  
Maize Crop ◽  
N Content ◽  
Development Stages ◽  
Early Stages

<p>The main factors determining plant growth and productivity are decisive to be understood since they<strong> </strong>contribute to maximize plant nitrogen use efficiency. Thus, more reviews related to the correlation between the real content of chlorophyll and real carotenoids with the values obtained by chlorophyll (SPAD) in the early development stages of the maize are important to be obtained. The relation between the maize crop responses to the nitrogen fertilization at different development stages is of fundamental importance as well. The primary objective of this study was to investigate the responses of maize to the nitrogen application, urea fertilizer (<sup>15</sup>N), in side-dress at different development stages. The secondary objective was verifying the correlation between chlorophylls and carotenoids with SPAD index and these with total biomass (BM), harvest index (HI), grain yield (GY) and grain N content in response to the nitrogen side-dress at different development stages. The nitrogen fertilization was carried out in plots, with the application of 30 kg ha<sup>-1</sup> of N at planting and 140 kg ha<sup>-1</sup> N as side-dress at vegetative stages V4, V6, V8, V10, and V12, without incorporation into the soil, and control treatment consisted of non-nitrogen side-dress application was also utilized. The 2011/2012 season presented higher precipitation than 2012/2013. Maize crop responded similarly for GY to the nitrogen application in side-dress in both seasons, however, the nitrogen application in the early stages caused higher values for leaf variables, leaf pigments, and SPAD. Higher amount of nitrogen in all parts of the plants was observed in the 2011/2012 season than in 2012/2013, influenced by the adequate weather conditions at the nitrogen application moment. Grain N content from <sup>15</sup>N fertilizer and N uptake and efficiency were greater for early N applications. SPAD values correlated positively with most pigment variables at V16 in both seasons, thus proving that SPAD was an efficient instrument of indirect evaluation of chlorophylls and carotenoids in maize leaves at early stages. Chlorophyll b at V16 was positively correlated (P &lt; 0.05) with grain N content, GY, and BM, and total chlorophyll at V16 was positively correlated with GY and grain N content. However the chlorophylls a and total, evaluated at V14, were negatively correlated with GY. So, measurement of real chlorophyll and carotenoid pigment contents should be done after V14 stage when studies aim to evaluate crop nutritional conditions and prescribe future grain production practices.</p>

scholarly journals Molybdenum application forms associated to topdressing nitrogen fertilization in the production of maize crops

2017 ◽  
Vol 3 (2) ◽  
pp. 105
Author(s):  
Renê José dos Santos ◽  
José Henrique Bizzarri ◽  
André Prechlak Barbosa ◽  
Claudemir Zucareli
Keyword(s):  
Experimental Design ◽  
Grain Yield ◽  
Plant Height ◽  
Nitrogen Fertilization ◽  
Foliar Application ◽  
Stem Diameter ◽  
Maize Crop ◽  
Foliar Treatment ◽  
Application Forms

Nitrogen fertilization associated to the application of molybdenum (Mo) can increase grain yield in maize crops. Therefore, the objective of this study was to evaluate the effect of molybdenum application forms associated to topdressing nitrogen fertilization on production components and maize crops grain yield. The experiment was conducted with the cultivar Pioneer® 30F53H, under a randomized blocks experimental design, with subdivided parcels and four replications. Four forms of Mo applications were evaluated in each parcel: control (without Mo); seeds treatment (40 g ha-1 Mo); foliar treatment (40 g ha-1 Mo); seeds treatment (20 g ha-1 Mo) plus foliar treatment (20 g ha-1 Mo), using potassium molybdate as Mo source. The sub-parcels received four dosages of nitrogen (N), in topdressing (0, 80, 160 and 240 kg ha-1 N), in the form of urea. The experiment evaluated plant height, ear insertion height, stem diameter, number of grains per ear, 100 grains mass and grain yield in maize crops. The increase in N dosages in topdressing increases plant height, ear insertion height, stem diameter, number of grains per ear, 100 grains mass and maize crop grains yield. The application of molybdenum improves N absorption by maize crops. When applied via seeds treatment, Mo brings better results to foliar application in partial or total dosages.

Sign in / Sign up

Export Citation Format

Share Document