scholarly journals Effect of Artificial Detasseling and Defoliation on Maize Seed Production

2019 ◽  
pp. 1-9 ◽  
Author(s):  
Marcio Paulo Czepak ◽  
Marcio Kliemann ◽  
Omar Schmildt ◽  
Rubens Neres Araujo ◽  
Vinicius de Souza Oliveira ◽  
...  
Keyword(s):  
Zea Mays ◽  
Seed Production ◽  
Zea Mays L ◽  
Block Design ◽  
Maize Seed ◽  
Hybrid Corn ◽  
Central Lines ◽  
Randomized Complete Block Design ◽  
Set Up

The objective of this work was to evaluate the effect of artificial detasseling and defoliation on the production of Pioneer 30F90 simple hybrid corn (Zea mays L.) seeds. The experiment was set up in a randomized complete block design, consisting of seven treatments (Control; detasseling; detasseling + defoliation of the top leaf; detasseling + defoliation of the two upper leaves; detasseling + defoliation of the three upper leaves; detasseling + defoliation of the upper four leaves; detasseling + defoliation of the upper five leaves), with 4 replicates. The plots were composed of 6 spaced rows of 0.90 cm by 6.00 m in length. At the time of the issue of 50% of the tassel were carried out the treatments. For the evaluations the two central lines of each plot were collected, eliminating 1.00 m from each end, totaling a useful area of 7.2 m². At harvest, the crop presented a final stand of 5 plants m² (50000 ha-1). According to the results obtained, it was concluded that the detasseling positively influenced the production components, due to the decrease of the auto-shading. The higher the level of defoliation, the lower the active photosynthetic area of the plant, and consequently the lower the productivity. The most affected production components in defoliation are grain numbers in the row, grain numbers in the ear and weight of 1000 grains. detasseling and defoliation do not interfere with the germination of corn seeds.

scholarly journals AKIBAT PEMANGKASAN TASEL DAN DAUN DI BAWAH TONGKOL TERHADAP PRODUKSI BIJI JAGUNG ( Zea mays, L )

2018 ◽  
Author(s):  
surtinah
Keyword(s):  
Zea Mays ◽  
Seed Production ◽  
Zea Mays L ◽  
Block Design ◽  
Maize Seed ◽  
Maize Crop ◽  
Random Block ◽  
Production Research ◽  
Random Block Design

Seed maized have ability in piling up dry materials, but process thatdepended from result of photosynthesis conducted by leaf at the time of growth ofvegetative and also at the time of generative growth, its problem do tasel also playa part in conglomeration of dry materials to seed. Object of this research is to getmost precise maize crop organ clipping and give best maize seed production. Research conducted by using random block design in factorial; first factoris pruning of tasel which consist of 2 level that is clipped and do not be clipped.Second factor is leaf pruning under cob which consist of 3 level that is withoutprunned, pruning 3 piece of leaf, and pruning entire leaf. Continued test usedDNMRT at level 5 % parameter perceived is dry wight of cob / crop (g), weigh ofpipilan dry / crop (G). and wight 100 seed of pipilan dry / crop (g). Result of research indicated that pruning of tasel can improve dry wight ofcob / crop, weight of pipilan dry / crop, and wight 100 seed of pipilan dry

scholarly journals Evaluation of nitrogen (Urea) on Zea mays L. under Balkh province climate

2020 ◽  
Vol 3 (1) ◽  
pp. 6-9
Author(s):  
Nasratullah Habibi ◽  
Friba Sikandari
Keyword(s):  
Zea Mays ◽  
Nitrogen Fertilizer ◽  
Yield Components ◽  
Zea Mays L ◽  
Agricultural Research ◽  
Block Design ◽  
High Yield ◽  
Randomized Complete Block Design ◽  
Yield And Yield Components ◽  
Effect On Yield

An experiment was conducted to evaluate effect of urea fertilizer on yield and yield components of Zea mays L. Using Randomized Complete Block Design (RCBD) split plots in three replications in agricultural research farm of Balkh University by 2019. Doses of urea used in this experiment were 0, 80, 160 and 240 kg ha-1 , respectively. It has been found that amount of nitrogen fertilizer (urea) had significant effect on yield of maize at p<0.05. The higher level of nitrogen caused the higher grain yield, number of kernels per ear, the number of grains per ear row, ear diameter, cob length, grain per plant and plant height. As a result 7.76 ton ha-1 was recorded as high yield while 240 kg ha-1 urea was used, and 5.12 ton ha-1 was recorded as low yield in treatment one with 0 kg ha-1 of nitrogen fertilizer. Finally, as a result using 240 kg ha-1 nitrogen fertilizer is recommended.

ARRANJO POPULACIONAL PARA A VARIEDADE UENF-14 DE MILHO PIPOCA

2017 ◽  
Vol 16 (3) ◽  
pp. 401
Author(s):  
CÁSSIO VITORAZZI ◽  
ANTONIO TEIXEIRA AMARAL JÚNIOR ◽  
LILIAM SILVIA CANDIDO ◽  
ISMAEL LOURENÇO DE JESUS FREITAS ◽  
THIAGO RODRIGUES DA CONCEIÇÃO SILVA
Keyword(s):  
Zea Mays ◽  
Grain Yield ◽  
Rio De Janeiro ◽  
Zea Mays L ◽  
Block Design ◽  
Grain Production ◽  
Maize Population ◽  
The North ◽  
Randomized Complete Block Design ◽  
Janeiro State

 RESUMO - A adequação do arranjo populacional está entre as técnicas que podem maximizar a produtividade da cultura do milho. Daí a importância das pesquisas que buscam estudar o desempenho de cultivares de milho e milhos especiais, a fim de determinar o arranjo de plantas ideal. O objetivo deste trabalho foi avaliar o desempenho da variedade UENF-14, de milho pipoca, cultivada em diferentes arranjos populacionais, na safra e safrinha, para otimizar a recomendação fitotécnica para os produtores rurais do Norte Fluminense. Foram instalados dois experimentos em Campos dos Goytacazes-RJ. Um na safrinha 2011 utilizando a variedade UENF-14 e o híbrido experimental P2 x P9, e o outro na safra 2011-2012, com a variedade UENF-14 e o híbrido comercial IAC-112. O delineamento experimental, nos dois experimentos, foi o de blocos casualizados arranjados em parcelas subsubdivididas, em que as parcelas foram compostas pelos genótipos, as subparcelas constituídas pelos espaçamentos entre linhas de semeadura (0,45, 0,60 e 0,90 m) e as subsubparcelas compostas pelas densidades de plantas (60.000, 75.000 e 90.000 plantas ha-1). A UENF-14 apresentou desempenho superior aos híbridos, demonstrando seu potencial para cultivo na região Norte Fluminense. Houve aumento do rendimento de grãos com a diminuição do espaçamento entre linhas de plantio. Para a variedade UENF-14, a redução do espaçamento entre linhas de plantio foi vantajosa para a produção de grãos, independentemente da época de semeadura.Palavras-chave: Zea mays L., densidade de semeadura, espaçamento entre linhas, épocas de semeadura.  POPULATION ARRANGEMENT FOR THE VARIETY OF POPCORN UENF-14 ABSTRACT - The adequacy of the maize population arrangement is among the most important techniques for obtaining higher yields. Therefore, many researchers have been conducting an attempt to study the performance of corn and specialty corn. The objective was to evaluate the performance of the popcorn variety UENF-14 in different population arrangements, in the harvest season and off-season. Two experiments were carried out in Campos dos Goytacazes, North of Rio de Janeiro State, Brazil, in the off-season 2011, using the UENF-14 variety and the experimental hybrid P2 x P9, and in the season 2011-2012 using UENF-14 and the commercial hybrid IAC-112. The treatments were arranged in randomized complete block design with split plots, in which plots were composed by popcorn genotypes, the subplots consisting of three spacings between sowing lines (0.45, 0.60 and 0.90 m) and the subsubplots composed of three plants per hectare densities (60,000, 75,000 and 90,000 plants.ha-1). The variety UENF-14 presented higher performance than the hybrids, demonstrating its potential for recommendation to the North of Rio de Janeiro State. There was an increase of grain yield by reducing the spacing between the plants rows. The cultivation of the variety UENF-14 reducing the spacing between rows was advantageous for grain production, regardless of planting date.Keywords: Zea mays L., densities of plants, spacing between rows, sowing times.

scholarly journals Pengaruh Bokashi Ela Sagu Pada Berbagai Tingkat Kematangan Dan Pupuk SP-36 Terhadap Serapan P Dan Pertumbuhan Jagung (Zea mays L.) Pada Tanah Ultisol

Agrologia ◽  
2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Margaret Ch Soplanit ◽  
Ruddi Soplanit
Keyword(s):  
Zea Mays ◽  
Plant Height ◽  
Zea Mays L ◽  
Block Design ◽  
P Uptake ◽  
Stem Diameter ◽  
Soil Productivity ◽  
Maturity Level ◽  
Randomized Block Design ◽  
Set Up

Fertilization efficiency which could enhance soil productivity is determined by type, application method and appropriate dose of fertilizers.  A green house experiment to study effect of different maturity level of ela  sago bokashi and some dosage of  SP-36 fertilizer on P-uptake and growth of maize (zea mays l.) on ultisols has been performed. The experiment was set up in three-replicates factorial Randomized Block Design. The treatments were  three maturity level of ela sago bokashi i.e. 2, 3 and 4 weeks; and four dosages of SP-36 fertilizer i.e. 0, 2, 4 and 6 g/10 kg of soil. The results showed that application of bokashi regardless of their maturity at the same time with each  doses of SP-36  increased P uptake, plant height and stem diameter of maize. Giving four-week ela sago bokashi with 6 gr/10 kg of soil of SP-36 was the best treatment to improve P uptake, plant height and stem diameter of corn crop up to  0.15%, 140, 60 cm and 1.64 mm respectively.

scholarly journals Yield Stability Analysis of Maize (Zea mays L.) Hybrids Using Parametric and AMMI Methods

Scientifica ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Seyed Habib Shojaei ◽  
Khodadad Mostafavi ◽  
Ali Omrani ◽  
Saeed Omrani ◽  
Seyed Mohammad Nasir Mousavi ◽  
...  
Keyword(s):  
Zea Mays ◽  
Grain Yield ◽  
Zea Mays L ◽  
Block Design ◽  
High Yield ◽  
Stability Parameters ◽  
Maize Hybrids ◽  
Randomized Complete Block Design ◽  
Ammi Analysis ◽  
The Stability

The present study investigated the stability and adaptability of maize (Zea mays L.) hybrids. In this study, 12 maize hybrids were planted and examined considering the grain yield. The experiment was arranged in a randomized complete block design (RCBD) with three replications in four research stations in Iran during two crop years. The combined analysis of variance showed that genotype-environment interactions were significant at one percent probability level. The grain yield can stabilize, and hybrids with specific adaptability are recommended to each environment. Hybrids with specific adaptability can be recommended to all types of the environment. Means comparison yield of the genotypes identified DC370 as a high-yield genotype. Regarding AMMI analysis, genotype × environment interactions (GEIs) and two first components were found significant. The SC647 genotype was identified as the most stable genotype. Regarding the stability parameters, SC647 and KSC705 genotypes were selected as the most stable genotypes. From AMMI1 and AMMI2 graphs, the SC647 genotype was identified as the most stable genotype compared with other hybrids.

scholarly journals Optimization of Spray Fluid for Herbicide Application for Drones in Irrigated Maize (Zea mays L.)

2021 ◽  
pp. 137-145
Author(s):  
C. Supriya ◽  
P. MuraliArthanari ◽  
R. Kumaraperumal ◽  
A. P. Sivamurugan
Keyword(s):  
Zea Mays ◽  
Weed Control ◽  
Tamil Nadu ◽  
Zea Mays L ◽  
Block Design ◽  
Herbicide Application ◽  
Recommended Dosage ◽  
Control Efficiency ◽  
Randomized Complete Block Design ◽  
Weed Control Efficiency

A field experiment was conducted in a randomized complete block design to screen the optimum spray fluid of herbicide application for drone based on visual toxicity and weed control efficiency in maize (Zea mays L.) during the summer season (March 2021) at eastern block farms of Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu. Three herbicide treatments namely Atrazine, Tembotrione and 2, 4-D with recommended dosages, 75% and 125% as pre-emergence herbicides applied on 3 days after, early post-emergence herbicides applied on 15 days after sowing and post-emergence applied on 25 days after sowing respectively. Totally thirty treatments with different spray fluids such as 500, 400, 300, 200, 100, 80, 60, 40, 30 L ha-1 and 20 L ha-1 were replicated three times. The study revealed that T5- Recommended dosage of pre emergence Atrazine – early post emergence Tembotrione – post emergence 2, 4-D (spray fluid 100 L of water ha-1),T6- Recommended dosage of pre emergence Atrazine – early post emergence Tembotrione–post emergence 2, 4-D (spray fluid 80 L of water ha-1), T7- Recommended dosage of pre emergence Atrazine – early post emergence Tembotrione – post emergence 2, 4-D (spray fluid 60 L of water ha-1) and T8- Recommended dosage of pre emergence Atrazine – early post emergence Tembotrione – post emergence 2, 4-D (spray fluid 40 L of water ha-1) produced the best results with respect to phytotoxicity and weed control efficiency. Based on the results it was concluded that the application of spray fluid 80 L ha-1 was optimum for herbicide application through drones with recommended dosage pre emergence Atrazine 1 kg a.i ha-1 on 3 days after sowing – early post emergence Tembotrione 120 g a.i ha-1 on 15-20 days after sowing - post emergence 2, 4-D 1 kg a.i ha-1 on 30 - 35 days after sowing.

scholarly journals Diallel crosses among maize lines with emphasis on resistance to foliar diseases

2000 ◽  
Vol 23 (2) ◽  
pp. 381-385 ◽  
Author(s):  
Maria Elisa Ayres Guidetti Zagatto Paterniani ◽  
Eduardo Sawazaki ◽  
Christina Dudienas ◽  
Aildson Pereira Duarte ◽  
Paulo Boller Gallo
Keyword(s):  
Zea Mays L ◽  
Block Design ◽  
Randomized Complete Block Design ◽  
Puccinia Polysora ◽  
Ear Height ◽  
Plant Stand ◽  
Set Up ◽  
Moderate Resistance ◽  
Pollen Shed ◽  
Single Cross Hybrids

Ten elite maize (Zea mays L.) lines were crossed in a complete diallel scheme and the single-cross hybrids obtained were assessed at four experimental stations of the Agronomic Institute of Campinas, in São Paulo State, Brazil. The experiments were set up in a randomized complete block design with three replications, including four commercial checks. The experimental plots consisted of two 5-m rows spaced at 0.9 m, with a total of 50 plants. The traits assessed included: days to mid-tassel pollen shed (DPS), plant height (PH), ear height (EH), grain yield, corrected for a 50-plant stand and 14% moisture (GY corr.), and resistance to Phaeosphaeria maydis and Puccinia polysora. General and specific combining ability effects (GCA and SCA) were determined. There was extensive genetic variability among hybrids with the best hybrids (HS 04 x 10 and HS 10 x 11) not differing from the commercial checks. The lines with the greatest potential for hybrid synthesis included: L 10, L 11 and L 13, because they had higher GCA for yield, moderate resistance to P. maydis and reduced EH. The greatest contribution to reduction of the Phaeosphaeria stain was obtained with L 5. The magnitude of the GCA relative to the total variation indicated that additive effects predominated for resistance to P. maydis and P. polysora. Significant SCA (P < 0.01) was also found, indicating dominance effects as well.

scholarly journals Effects of Different Levels of Phosphorous and Zinc Fertilizers on the Yield and Nutrient Uptake of Maize (Zea mays L.) on Luvisols in Northern Guinea Savannah Region of Nigeria

2020 ◽  
pp. 1-7
Author(s):  
Maryam Abdullahi ◽  
Abubakar Bello
Keyword(s):  
Zea Mays ◽  
Nutrient Uptake ◽  
Zea Mays L ◽  
Block Design ◽  
Factorial Experiment ◽  
Mean Values ◽  
Randomized Complete Block Design ◽  
Four Levels ◽  
Different Levels ◽  
Experimental Plots

The study aimed to determine the effects of different levels of phosphorous and zinc fertilizers on the yield and nutrient uptake of maize (Zea mays L.) The experiments were  conducted in a factorial experiment under Randomized Complete Block Design (RCBD) to determine the effect of P and Zn applications on TZL white composite improved variety            of maize. Four levels of phosphorus (0, 10, 20 and 30 kg P ha-1) and three levels of zinc (0, 5 and 10kg Zn ha-1) were applied on experimental plots of 4.5m x 5m replicated thrice.  The results shows no significant differences in both the  years however, highest mean values of 2327.5 kg ha-1  and 2191.5 kg ha-1 was recorded at 20 kg P ha-1 and 10 kg Zn ha-1 Application of P and Zn at different rates increases their uptake in the stover with highest values of 22.57 mg -1 kg  and 7.8 mg -1 kg  in 2018  at 30 kg Pha-1 and 18.40 mg -1 kg  and 5.21 mg -1 kg  at 20 kg Pha-1  in 2019. While 26.54 mg -1 kg and 21.85 mg -1 kg in 2018 at 10 kg Znha-1 and 6.76 mg -1 kg and 5.27 mg -1 kg in 2019 with 0 kg Znha-1 respectively. It is therefore recommended the best results of the application of 30kg P ha-1 and 10 kg Zn ha -1 should be adopted for optimum yield of maize.

scholarly journals Effect of Intercropping Dates of Lablab (Lablab purpureus L.) with Maize (Zea mays L.) on Forage and Maize Grain Yields

2020 ◽  
pp. 1-4
Author(s):  
Meseret Redae ◽  
Desta Tekle
Keyword(s):  
Zea Mays ◽  
Dry Matter ◽  
Zea Mays L ◽  
Block Design ◽  
Forage Yield ◽  
Lablab Purpureus ◽  
Grain Yields ◽  
Maize Grain Yield ◽  
Randomized Complete Block Design ◽  
Maize Grain

This study was conducted to evaluate effect of intercropping dates of lablab (Lablab purpureus L.) with maize (Zea mays L.) on forage and maize grain yields. It was carried out at Gereb Giba in Tanqua Abergelle district, Tigray, Ethiopia. Randomized Complete Block Design (RCBD) with four treatments and four replications were used. The treatments were sole maize sown (T1) and lablab sown at 10, 20 and 30 days after emergence of maize for T2, T3 and T4 respectively. Intercropping did not affect height and days for 50% flowering of lablab. Similarly, it was not affected height and days for physiological maturity of maize. Lablab forage yield was significantly greater (p<0.01) in T2 and T3 than T4. Maize Stover dry matter (DM) yield was similar among treatments while total forage DM yield was significantly higher (p<0.0001) in T2, T3 and T4 than T1. Moreover, among the intercrops, total forage yield was significantly highest (p<0.0001) for T2 compared to T4 but similar in T2 and T3. Maize grain yield was significantly superior (P<0.0001) in T2 and T3 compared to T1 and T4. Though, T2 and T3 had similarity in all parameters measured, T2 provided higher forage and maize grain yields than T1 and T4. Therefore, lablab intercropping at 10 days after emergence of maize is appropriate in Tanqua Abergelle district and other areas with similar agro ecologies.

scholarly journals Impact of Zinc and Manganese Application to Increase Productivity of Autumn Planted Maize (Zea Mays L.)

2015 ◽  
Vol 47 (4) ◽  
pp. 65-70 ◽  
Author(s):  
H.Z. Khan ◽  
M. Amin ◽  
N. Akbar ◽  
M.F. Saleem ◽  
A. Iqbal ◽  
...  
Keyword(s):  
Zea Mays ◽  
Seed Protein ◽  
Zea Mays L ◽  
Block Design ◽  
Research Area ◽  
Seed Protein Content ◽  
Plot Size ◽  
Randomized Complete Block Design ◽  
Biological Yield ◽  
Increase Productivity

Abstract Micronutrients play a significant role in various plant metabolic processes and are required in much smaller amount by the plants as compared to the macronutrients. An experiment was conducted during 2011, at the Agronomic research area, University of Agriculture, Faisalabad, Pakistan, to investigate the response of autumn planted maize to ZnSO4 and MnSO4 levels (10, 20 and 30 kg ha-1) and in combinations (5 kg ha-1 ZnSO4 + 5 kg ha-1 MnSO4, 10 kg ha-1 ZnSO4 + 10 kg ha-1 MnSO4 and 15 kg ha-1 ZnSO4 + 15 kg ha-1 MnSO4). The randomized complete block design (RCBD) having three replicates was used with plot size of 3 m x 6 m. The crop was planted on ridges 75 cm apart with recommended plant to plant distance of 25 cm. Maximum values for plant height at maturity (225 cm), cob diameter (4.29 cm), number of grains per cob (415), biological yield (20.15 tons ha-1), grain yield (7.42 tons ha-1) and seed protein content (8.96%) were recorded where 15 kg ha-1 ZnSO4 + 15 kg ha-1 MnSO4 was applied.

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