Evaluation of prolific hybrids maize performance on different population densities and nitrogen level (original) (raw)
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Evaluation of Four Maize Varieties for Optimum Growth and Yield under Field Condition
Advanced Agricultral Technology and Plant Sciences, 2018
In early 2000, world population stood at 6.0 billion people. It was projected to reach 8.0 billion by 2025, a 33 percent increase only in 25 years. During that little period, little change in total arable land is available for food production. Due to these facts, maize production has been improved with adoption of technologies by farmers. These technologies includes; the planting of improved seeds like hybrid and open pollinated varieties, timely planting, proper spacing, timely weeding and harvesting. Therefore, this experiment was conducted to determine the evaluation of four varieties of maize for optimum growth and yield under field condition. The experiment was laid down in a Randomised Completely Block Design (RCBD) with three (3) replicates. Each block consisted of four (4) treatments. The treatments include: TZEE-Y POP STRC4, EV99QPM, 2000SynEE-W QPM C0 and 99TZEE-Y STR. The growth parameters evaluated include Leaf length, leaf width, plant height, number of nodes, Distance between nodes, Stem girth, Length of inflorescent, number of cob and Period it takes to tassel (days). Also the yield parameters were: Weight of cob, Weight of 100 Grains, and Number of grains per cob. The TZEE-Y POP STRC4 has the best potential for increased grain yield due to the fact that it has wide genetic base which enables it to perform well irrespective of soil and environmental difference. The said treatment is also resistant to a wide range of biotic and a biotic stress which makes it a variety of first choice to farmers especially in this period of climate change. Therefore, TZEE-Y POP STRC4 could be confirmed as a high yielding variety with stable vigour.
Plant population effects on few yield parameters in some "Turda" maize hybrids
2009
Generally the maize yield per unit area responds to density changes. Optimum plant density for maximum grain yield per unit area may differ from hybrid to hybrid. Objective of the study was: to estimate the optimum density for maximum grain yield per unit area to seven hybrids, the density impact on stand uniformity, to evaluate how some hybrids, important yield parameters (yield per plant, ear length and kernel row number) respond to density changes. Experimentation was conducted at the Agricultural Research Station, Turda, Romania, during the 2006 and 2007 seasons under natural conditions, without irrigation. Seven single-cross hybrids (FAO 320 450) were grown at three densities (2.5, 4.2, 8.4 pl/m). Comparison of means was conducted by least significance difference (LSD) after analysis of variance for a two-factor split-plot design. In maize culture should take the necessary measures to achieve the optimum density for the chosen hybrids and the most uniform stand possible. Rezuma...
The responses of maize genotypes to growth conditions
Genetika, 2011
Kresović B, V. Dragičevic, M.Simic and A. Tarapanova (2011): The responses of maize genotypes to growth conditions. -Genetika, Vol 43, No. 3,655 -666. Studies on the effects of sowing densities on maize grain yields under irrigation were performed with the aim of creating favourable conditions for plant growth and development, under which the genetic yield potential would be maximally exploited. A two-factorial trial was performed in the period 2006-2009 on chernozem, according to the splitplot method with four replicates. Four maize hybrids of different FAO maturity groups (ZP 341, ZP 434, ZP 684 and ZP 704) were observed in combination with seven sowing densities (G1 -40,816 plants ha-1, G2 -50,125 plants ha-1, G3 -59,524 plants ha-1, G4 -69,686 plants ha-1, G5 -79,365 plants ha-1, G6 -86,286 plants ha-1 and G7 -98,522 plants ha-1).
Performance of second-crop maize hybrids in different population densities
The cultivation of second-crop (off-season) maize (Zea mays L.) has progressed in Brazil. However, the maize plant population recommendation for the second crop is drastically reduced. This work was developed with the objective of evaluating the agronomic performance of maize hybrids subjected to different plant populations in the off-season maize. The experiment was cultivated in a no-tillage system in the second crop of the 2019/2020 agricultural year in Unaí-MG and carried out according to a randomized block design in subdivided plots, with the five simple maize hybrids KWS (K9105VIP3, K9960VIP3, K9606VIP3, K9555VIP3, and K8774PRO3) considered as parcels and four populations (35,000; 50,000; 65,000 and 80,000 plants ha-1), considered as subplots. Maize hybrids did not influence (P>0.05) the variables. The populations of 35,000, 65,000 and 80,000 plants ha-1 resulted in the highest (P<0.05) number of rows, number of grains per row, and ear length. Increasing plant population influenced (P<0.05) positively the grain yields up to the population of plants of 68,200 plants ha-1 with a grain yield of 9,302 kg ha-1. Population densification, even increasing competition for resources, negatively influencing most plant and ear characters, increases grain yield due to the greater amount of ear per area.
Yields of ZP sweet maize hybrids in dependence on sowing densities
Genetika, 2008
Srdić J, M. Simić, Ž. Videnović and Z. Pajić (2008): Yields of ZP sweet maize hybrids in dependence on sowing densities. Vol. 40, No. 3,[293][294][295][296][297][298][299][300][301] Sweet maize differs from maize of standard grain quality by many important traits that affect the ear appearance, and especially by traits controlling taste. The ear appearance trait encompasses the kernel row number, configuration, row pattern (direction and arrangement), seed set, kernel width and depth, ear shape and size. The quality of immature kernels is controlled by genes by which sweet maize differs from common maize. In order to obtain high-ranking and high-quality yields, it is necessary to provide the most suitable cropping practices for sweet maize hybrids developed at the Maize Research Institute, Zemun Polje. The adequate sowing density is one of more important elements of correct cropping practices.
Evaluation of the Performance of Eighty-One Maize Entries for Yield and Other Agronomic Traits
2019
A full-diallel cross comprising eight varieties belonging to four different maturity groups was developed and generate the evaluated entries and studied for fifteen characters to assess their’ performance. Eighty-one entries comprising the crosses, reciprocals, selfs, parents and nine checks were evaluated at Kadawa under irrigation in two different sowing dates serving as two environments, they were arranged in 9 x 9 lattice design with three replications in each environment. The results of the study indicated that, SAMMAZ 27 x SAMMAZ 35, SAMMAZ 27 x SAMMAZ 17, SAMMAZ 36 x SAMMAZ 29, SAMMAZ 19 x SAMMAZ 27 and SAMMAZ 29 x SAMMAZ 19 are better and more suitable for early planting in environment one while SAMMAZ 19 x SAMMAZ 17, and SAMMAZ 36 x SAMMAZ 35 are better for late planting in environment two. There is a need to select different parental varieties for hybrid production for specific situations. Specific hybrids should be produced for particular planting dates under irrigation, ...
IOSR Journals , 2019
Abtract: This study was aimed to determine the yield of some maize varieties grown under different planting systems on dry land of Northern Lombok, Indonesia. The experiment was designed using a completely randomized block design, with two factors, namely maize variety and number of maize population which is realized from row spacing. The maize variety factor consist of 4 composite varieties (P4IS, Gumarang, Lamuru and Sukmaraga), and one hybrid variety (NK212). The row spacing factor consist of 5 types, namely 4 types of single row spacing (20x70 cm or 71428 plant/ha, 20x60 cm or 83333 plant/ha, 15x70 cm or 95238, and 15x60 cm or 111111 plant/ha), and double rows spacing ("jarwo"), that is 2:1 (20x35)x70 cm or 107142 plant/ha. The yield of maize was determined through dry seed weight per plot. Data collected were analyzed using analysis of variance at 5% level. The difference among treatments, then further tested using Honestly Significant Difference (HSD) at the same level. The results showed that there were interactions between varieties and row spacing for the yield of maize on dry land during the rainy season. The yield of all varieties tested under double spacing ("jarwo") and the single spacing of 15x60 cm are similar, both are higher than the yield of wider single row spacing. Yield of NK212 hybrid (5.397 t/ha) is higher than the four other composite maize varieties. The "jarwo", with one plant per hole, gives a yield of 5,064 t/ha which is the same as the 15x60 cm single row soacing (5,026 t/ha), both are higher than the yield of the other three wider single row spacing.
Maize hybrids yield potential as affected by plant population density in Qalyubia, Egypt
bioscience research, 2019
Two field experiments were carried out during the two successive of 2016 and 2017. To study the effect of three plant population densities on the growth characters, yield components, yield and some kernels chemical properties of three white single cross hybrids of maize. Significantly increased mean values of No. of days to 50 % tasseling, No. of days to 50 % silking, leaf area index (LAI), plant height (cm), ear position % (EP), No. of plants/fed, No. of barren plants/fed (NB), No. of ears/fed (NE), stover yield/fed (kg) (SY) and biological yield/fed (kg) (BY) in both seasons with increasing plant density from 20000 to 28000 plants/fed. On the other hand, mean values of No. of green leaves/plant (NGL), area of topmost ear leaf (cm2) (ATEL), leaf area/plant (cm2) (LA), NE, No. of kernels/row (NKR), ear weight (g) (EW), kernels shelling (%) (KS), 100-kernel weight (g) (100KW), ear yield/fed (kg), grain yield (GY)/fed (kg), GY/plant (g), harvest index (%) (HI), kernels nitrogen content (KNC), kernels crude protein content (KCPC), nitrogen uptake/fed (kg) (NU) and protein yield/fed (kg) (PY) were significantly decreased in the two seasons. All growth traits, yield components, yield and kernels chemical properties were significant differences with the studied three S.C. hybrids of maize. Hybrids were significantly differed in all traits studied under study in the both seasons, except NP at harvest. S.C. 30K8 was significantly surpassed S.C. 7071 and S.C. 2031 in mean values of No. of plants carried two ears/fed, NE, NE, NKR, NKR, GY/fed, GY/plant and HI as well as gave the lowest mean values of NB and the shortest period from planting to tasseling and silking dates in the both seasons. Moreover, S.C. 2031 surpassed the other two hybrids in mean values of area of ATEL, LA, LAI, EW, 100KW, ear yield/fed, BY, KNC, KCPC, NU and PY in the two seasons. Meanwhile, S.C. 7071 recorded the highest mean values of NGL, PH, EP, KS and SY in the two seasons. Planning maize hybrid of S.C. 30K8 at 20000 plants/fed recorded the greatest mean values of NE, NKR and HI as well as gave the lowest mean values of NB in the both seasons, while, sowing the same hybrid by 28000 plants/fed significantly recorded the highest mean values of NE during the both seasons. The greatest mean values of ATEL, LA, EW, 100KW, EY/fed, GY/plant, NU and PY in the both seasons were obtained from planting maize hybrid of S.C. 2031 at 20000 plants/fed. Meanwhile, planting the same maize hybrid under 28000 plants/fed significantly recorded the maximum mean values of LAI and BY. Planting S.C. 7071 at 20000 plants/fed recorded significantly the greatest mean values of NGL, NKR and KS during the two seasons. However, planting maize by 28000 plants/fed from the same hybrid significantly gave the maximum mean values of PH, EP and SY.
Aim: The objective of this investigation was to match the functions of optimum plant density to produce the highest possible grain yield per unit area with the greatest maize genotype efficiency. Study Design: A split plot design in randomized complete block arrangement was used with three replications. The main plots were assigned to plant densities, and sub-plots to maize genotypes. Place and Duration of Study: This study was carried out at the Agricultural Experiment and Research Station of the Faculty of Agriculture, Cairo University, Giza, Egypt in 2012, 2013 and 2014 seasons. Methodology: Six maize inbred lines differing in tolerance to high density (D) [three tolerant (T); L-20, L-53, Sk-5, and three sensitive (S); L-18, L-28, Sd-7] were chosen for diallel crosses. Parents and hybrids were evaluated under three plant densities: low (47,600), medium (71,400), and high (95,200) plants ha-1. 2 Results: The T×T hybrids were superior to the S×S and T×S hybrids under the high D in most studied traits across seasons. The relationships between the three densities and grain yield per hectare (GYPH) showed near-linear regression functions of increase for inbreds L-53, L-28, Sk-5 and Sd-7 and efficient non-responsive and inefficient responsive groups of hybrids with the optimum density of 95,200 plants ha-1 , near-linear regression of increase for inbred L-18 with optimum density of 47,600 plants ha-1 and a curvilinear relationship for inbred L20 and the rest of the hybrids with the optimum density of 95,200 plants ha-1 for inefficient non-responsive crosses and 88,000 plants ha-1 for inbred L20 and efficient responsive hybrids. Conclusion: Growing the tolerant hybrid L20×L53 under high-D gave the highest grain yield (17.05 t ha-1) in this study with a superiority to the best check (SC 2055) of 27.0%.