scholarly journals Yield Assessment of Maize Varieties under Varied Water Application in Semi-Arid Conditions of Southern Mozambique

Agronomy ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2541
Author(s):  
Alfredo Nhantumbo ◽  
Sebastião Famba ◽  
Isaac Fandika ◽  
Armindo Cambule ◽  
Elijah Phiri
Keyword(s):  
Grain Yield ◽  
Large Scale ◽  
Smallholder Farmers ◽  
Yield Stability ◽  
High Yield ◽  
Water Application ◽  
Arid Conditions ◽  
Maize Genotypes ◽  
Maize Varieties ◽  
Semi Arid

Maize is one of the most important staple food crops in Mozambique. Its production is country-wise dominated by smallholder farmers (more than 90%) under rain-fed conditions, where the risk of crop failure is high, especially under semi-arid conditions in southern Mozambique. Several maize genotypes have been developed for the broad agro-ecological zone adaptation but lack strong evidence about their productivity and yield stability to support decision-making in farming systems. In order to assess the yield and yield stability of maize genotypes under different environments, five identical on-station trials were implemented in the period 2017 to 2019, covering summer and winter seasons in the semi-arid region of southern Mozambique. The trials were established at the experimental station of the Universidade Eduardo Mondlane (UEM) in Sábie and at the Instituto de Investigação Agrária de Moçambique (IIAM) in Chókwe. A strip-plot design in a randomized complete block arrangement with 15 maize genotypes, and three water application (rainfall plus irrigation) levels in four replications was followed in a line-source irrigation arrangement. The water application levels varied from 151 mm to 804 mm, covering different water regimes. Under well-watered summer conditions, the genotypes G6 and G12 showed high yield and high grain yield stability. In the drier conditions, either in summer or winter, the G2 and G11 genotypes produced higher grain yield but with low stability. Both groups of genotypes have a high potential to be included in technology transfer packages to smallholder farmers to address food security or large-scale commercial farmers differently.

scholarly journals Assessment stability of maize lines yield by GGE-biplot analysis

Genetika ◽  
2018 ◽  
Vol 50 (3) ◽  
pp. 755-770 ◽  
Author(s):  
Dragan Bozovic ◽  
Tomislav Zivanovic ◽  
Vera Popovic ◽  
Mladen Tatic ◽  
Zagorka Gospavic ◽  
...  
Keyword(s):  
Grain Yield ◽  
Large Scale ◽  
Maize Yield ◽  
High Yield ◽  
Phenotypic Variance ◽  
Significant Treatment ◽  
Maize Grain Yield ◽  
Maize Genotypes ◽  
Significant Difference ◽  
Maize Grain

Maize genotypes have varied reactions in different localities, years, treatments or the combination of these factors, due to genotype x year interaction. The objective of this study was to estimate genotype by locality, by year, by treatments (G?L?Y?T) interaction using AMMI model, to identify maize genotypes with stable and high yield performance in different growing seasons. The trials with seven maize lines/genotypes were conducted during two years (2010-2011) at the four treatments and two locations: Pan?evo and Zemun Polje. The results showed that the influence of: genotype (G), locality (L), treatment (T) and G?L, G?T, Y?L, Y?T, L?T, G?Y?T, G?L?T, Y?L?T, G?Y?L?T interaction, on maize yield were significant (p<0.01). The share of genotype for maize grain yield in the total phenotypic variance was 21.16%, the aggregate share of the years and the locality was 6.10%, the treatment was 18.22%, and the total interaction was 54.52%. The AMMI analysis of the main components of IPCA1 and IPCA2 for the interaction of G?L and G?T shows that the first major component, IPCA1, comprises 100% of the sum of the squared interaction G?L and showed a statistically significant effect. The results also show that the sums of the squares of the first and second major components (PC1 and PC2) constitute 100% of the sum of the squared interaction G?L. The IPCA1 share in the G?T interaction was 47.39% and the IPC2 was 37.94%. IPC1 and IPC2 for this interaction was 85.33%. A high level of IPC2 indicates a significant treatment effect. The results of AMI analysis show that there is a significant difference between the genotype reactions to different ecological conditions for investigated factors. It also provided better insight in specific association between maize grain yield, locality, treatment and meteorological variables. Among the tested maize lines/genotypes, L-5, L-4 and L-6 could be separated as highest yielding genotypes, however L-5 could be recommended for further breeding program and in large-scale seed production due to its stable and high yielding performance.

scholarly journals Evaluation of Open Pollinated Normal Maize Varieties in the Eastern Mid Hill of Nepal

2014 ◽  
Vol 8 ◽  
pp. 18-22
Author(s):  
Surya N. Sah ◽  
Diwakar Sharma
Keyword(s):  
Grain Yield ◽  
Block Design ◽  
Yield Potential ◽  
High Yield ◽  
Research Station ◽  
Cropping Patterns ◽  
Phenotypic Characters ◽  
Maize Genotypes ◽  
Normal Maize ◽  
Maize Varieties

Full season maize genotypes were evaluated in on station coordinated varietal experiments   during summer season at Agriculture Research Station (ARS), Pakhribas in three consecutive years 2003, 2004 and 2005. The experiments were laid out in randomized complete block design (RCBD) with three replications. The objective of this study was to identify high yield potential normal maize genotypes suitable for the existing cropping patterns in the eastern mid hill. Genotypes were evaluated in coordinated varietal trials (CVT) in 2003, 2004 and 2005 and in intermediate yield trial (IYT) in 2004. Five common genotypes including local and standard check were evaluated in the CVT 2003 and in the CVT 2004, another five common genotypes tested in the CVT 2004 and in the CVT 2005 and six common genotypes of the IYT 2004 and CVT 2005 were analyzed over year. Genotype P501-SARCO-F1/P502-SARCO-F1 produced significantly higher grain yield   followed by DRACOSYN- F1/DRBCOSYN-F1 in the 1st two years and found about one week earlier than Mankamana-3. Across 00502 and Across 9942/Across 9944 were found superior with respect to grain yield and phenotypic characters like husk cover, plant aspect and ear aspect both in CVT 2005 and IYT 2004 across the years and the genotype Across   9942/Across 9944 was found tolerant to turcicum leaf blight (TLB) in 2005.Nepal Agric. Res. J. Vol. 8, 2007, pp. 18-22DOI: http://dx.doi.org/10.3126/narj.v8i0.11566 

Grain yield stability of new maize varieties in Nigeria

2001 ◽  
Vol 9 (4) ◽  
Author(s):  
B. A. Ogunbodede ◽  
S. R. Ajibade ◽  
S. A. Olakojo
Keyword(s):  
Grain Yield ◽  
Yield Stability ◽  
Maize Varieties

EFFECT OF DATES AND RATES OF SOWING ON YIELD AND YIELD COMPONENTS OF NARBON VETCH UNDER SEMI-ARID CONDITIONS

2001 ◽  
Vol 49 (1) ◽  
pp. 103-105 ◽  
Author(s):  
A. M. Tawaha ◽  
M. A. Turk
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Yield Components ◽  
Field Experiments ◽  
Grain Weight ◽  
Arid Conditions ◽  
Yield And Yield Components ◽  
1000 Grain Weight ◽  
Semi Arid ◽  
Northern Jordan

Field experiments were conducted during the winter seasons of 1998–1999 and 1999–2000 at Houfa in northern Jordan, to study the effect of the date and rate of sowing on the yield and yield components of narbon vetch (Vicia narbonensis L.). Progressive delays in sowing beyond 1 st January led to yield reductions of 11.1 and 17.9 at successive 15-day intervals. Plant height, pods stem –1, stems m –2 and 1000-grain weight followed the same trend as the yield. Grain yield was not significantly affected by the sowing rate.

Edge effects on yield, yield components and other traits in mechanized durum wheat and barley trials

1983 ◽  
Vol 101 (2) ◽  
pp. 383-387 ◽  
Author(s):  
A. Hadjichristodoulou
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Edge Effect ◽  
Edge Effects ◽  
Yield Components ◽  
Straw Yield ◽  
Varietal Differences ◽  
Arid Conditions ◽  
1000 Grain Weight ◽  
Semi Arid

SUMMARYA series of trials were conducted during 1979–82 under semi-arid conditions in a Mediterranean-type environment to study the edge effects in mechanized durum wheat and barley variety trials when uncropped pathways are left between plots. Varietal differences in edge effects on grain yield were in most trials not significant. Thus, edge effects do not distort significantly the relative ranking of varieties.Edge effects were significant for all traits studied and higher in grain and straw yields. These effects were also higher in drier seasons. The overestimation of grain yield from whole plots was 13–18% in relatively high rainfall seasons and 29% in a dry season. In two seasons the scores on the two outer rows were higher than on the two central rows by 89 and 117 % for grain yield, by 72 and 73% for straw yield, by 44 and 48% for numbers of tillers, by 6% for 1000-grain weight and by 14 and 40% for number of grains per tiller. The edge effect was not confined to the outer rows, but it extended to the inner rows of the plot; the magnitude of this effect varied with season and trait.Rows adjacent to the pathway and unprotected from wind had a lower value for all traits than the opposite rows of the pathway, which were protected by the inner rows.

scholarly journals Impact of Different Nitrogen Levels to the Grain Yield and Yield Components of Some Corn (Zea mays L.) Hybrids

2021 ◽  
pp. 48-60
Author(s):  
Wisam Khald Sabri ◽  
Abdullah Oktem
Keyword(s):  
Grain Yield ◽  
Leaf Area Index ◽  
Nitrogen Fertilizer ◽  
Kernel Weight ◽  
Total Chlorophyll ◽  
Area Index ◽  
Nitrogen Levels ◽  
Maize Genotypes ◽  
Maize Varieties ◽  
Single Cross

Aims: The study was designed to elucidate the effect of different nitrogen (N) fertilizer levels on five different maize cultivars. Study Design:  A split plot experimental design in randomized complete blocks (RCBD) with three replicates. Arrangement of seven nitrogen levels and five single cross hybrids were compared. Main plots were nitrogen levels and subplots were varieties. Place and Duration of Study: College of Agricultural Engineering Sciences at the University of Duhok, Iraq. The study was undertaken fromMarch– August 2021. Methodology: At the present research, five single cross-hybrid corn varieties were used, which were: CADZ, DKC6050, DRACHMA, MYIMY and ZP6468D. Arrangement of seven nitrogen fertilizer levels were 0, 50, 100, 150, 200, 250 and 300 kg N ha−1. The following features were studied: plant height, leaf area index, thousand kernel weight, total grain yield, total chlorophyll, protein% and oil %.The collected data were projected to SAS software program for analysis. The significant differences between treatment means were calculated using Duncan’s multiple ranges. Results: It was reveal that there were significant effect of different nitrogen fertilizer levels, maize genotypes as well as the interaction of nitrogen and genotype of maize (P<.01) for plant height, leaf area index, 1000 kernel weight, total grain yield, total chlorophyll and protein %. However, There were no significant differences between different maize genotypes as well as different nitrogen fertilizer levels (P>.05) with oil %, but the interaction of nitrogen and genotype of maize was significant (P<.01). Conclusion: Increasing the amount of nitrogen had better effect on studied characteristics of different maize varieties, in which adding 300 kg nitrogen had optimum results. In considering the response of maize varieties to nitrogen, the best variety was DRACHMA genotype while the worst variety was CADZ genotype, however this hybrids was superior in some traits.

scholarly journals Grain yield stability of early maize genotypes

2016 ◽  
Vol 2 (1) ◽  
pp. 94-99 ◽  
Author(s):  
Chitra Bahadur Kunwar ◽  
Ram Bahadur Katuwal ◽  
Sailendra Thapa ◽  
Jiban Shrestha
Keyword(s):  
Grain Yield ◽  
Block Design ◽  
Yield Stability ◽  
Gge Biplot ◽  
Maize Genotypes ◽  
Superior Genotype ◽  
Randomized Complete Block Design ◽  
Stability Pattern

The objective of this study was to estimate grain yield stability of early maize genotypes. Five early maize genotypes namely Pool-17, Arun1EV, Arun-4, Arun-2 and Farmer’s variety were evaluated using Randomized Complete Block Design along with three replications at four different locations namely Rampur, Rajahar, Pakhribas and Kabre districts of Nepal during summer seasons of three consecutive years from 2010 to 2012 under farmer’s fields. Genotype and genotype × environment (GGE) biplot was used to identify superior genotype for grain yield and stability pattern. The genotypes Arun-1 EV and Arun-4 were better adapted for Kabre and Pakhribas where as pool-17 for Rajahar environments. The overall findings showed that Arun-1EV was more stable followed by Arun-2 therefore these two varieties can be recommended to farmers for cultivation in both environments.

The Water Relations of Barley Grown Continually or After Fallow Under Semi-Arid Conditions

1994 ◽  
Vol 30 (4) ◽  
pp. 431-439 ◽  
Author(s):  
P. I. Orphanos ◽  
C. Metochis
Keyword(s):  
Water Stress ◽  
Grain Yield ◽  
Water Relations ◽  
Experimental Period ◽  
Water Requirement ◽  
Annual Rainfall ◽  
Arid Conditions ◽  
Semi Arid

SUMMARYGrain barley was grown either continually or in rotation with fallow in a 12-year experiment. Annual rainfall ranged from 120 to 297 mm. As the water requirement of the crop is 240 mm, growth in most seasons occurred under water stress. The amount of water conserved under fallow was only significant (75–100 mm) in three of the 12 years and only once did the water conserved increase barley yield in the following year. The total grain yield over the experimental period was twice as high in the barley–barley sequence as in the barley–fallow sequence.Cultiuo continuo de cebada o después de barbecho

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