Plant Population Influence on Maize Yield Components in Croatia and Nebraska (original) (raw)
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Cereal Research Communications
Maize (Zea mays L.) yield component analysis is limited. Research was conducted in 2012 and 2013 at Zagreb, Croatia and Mead, Nebraska, United States with the objective to determine the influence of environment, hybrid maturity, and plant population (PP) on maize yield and yield components. Three maturity classes of maize hybrids were produced at five PP ranging from 65,000 to 105,000 plants ha-1 under rainfed conditions. Yield, ears m-2 , rows ear-1 , ear circumference, kernels ear-1 , kernels row-1 , ear length, and kernel weight were determined. Average yield was 10.7 t ha-1 , but was variable for hybrids across PP. The early maturity-hybrids had lesser ear circumference, more kernels ear-1 , greater ear length, and fewer rows ear-1 than mid-and late-maturity hybrids. Kernels ear-1 had the highest correlation with yield (r = 0.47; P < 0.01 for early-maturity hybrids; r = 0.55; P < 0.01 for the mid-and late-maturity hybrids). Path analysis indicated that ears m-2 , kernels ear-1 and kernel weight had similar direct effects on yield for early-maturity hybrids (R = 0.41 to 0.48) while kernels ear-1 had the largest direct effect (R = 0.58 versus 0.32 to 0.36) for the midand late-maturity hybrids. Rows ear-1 had an indirect effects on yield (R = 0.30 to 0.33) for all hybrids, while kernels row-1 had indirect effect (R = 0.46) on yield for mid-and latematurity hybrids. Yield component compensation was different for early-maturity hybrid than the mid-and late-maturity hybrids, likely due to the proportion of southern dent and northern flint germplasm present in these hybrids.
Effect of Plant Population Densities on Yield of Maize
thejaps.org.pk
A field experiment to determine the effect of plant population densities on maize was conducted at the Agricultural Research Institute, Dera Ismail Khan, in mid July 2009. The effect of six plant population densities i.e. T 1 (40000 plants ha-1), T 2 (60000 plant ha-1), T 3 (80000 plants ha-1), T 4 (100000 plants ha-1), T 5 (120,000 plants ha-1) and T 6 (140,000 plants ha-1) was investigated using maize variety Azam. Results showed that plant population of 40000 ha-1 produced maximum number of grains per row (32.33) and grains per ear (447.3). However, 60000 plants ha-1 produced the maximum number of ears per plant (1.33), number of grain rows per ear (15.44), biomass yield (16890 kg ha-1) and grain yield (2604 kg ha-1). Therefore, planting density of 60000 plants ha-1 (keeping plant to plant distance of 22.70cm) is recommended for obtaining higher yield of maize.
2020
The potential yield of annual crops is affected by management practices and water and energy availabilities throughout the crop season. The current work aimed to assess the effects of plant population and soil covering on yield components of maize. Field experiments were carried out during 2014-15 and 2015-16 growing seasons at areas grown with oat straw, voluntary plants and bare soil, considering five different plant populations (40,000, 60,000, 80,000, 100,000 and 120,000 plants ha-1) and three sowing dates (15 Sep., 30 Oct., 15 Dec.) for the hybrid P30F53YH in Ponta Grossa, State of Parana, Brazil. Non-impacts of soil covering or plant population on plant height at the flowering phenological stage were observed. Significant effects of soil covering on crop physiological and yield components responses throughout the 2014-15 season were detected. Influence of plant populations on yield components was evidenced, suggesting that from 80,000 plants ha-1 the P30F53YH hybrid performs a...
African Journal of Agricultural Research , 2018
The objective of this study was to find a group of independent variables that would influence and estimate maize (Zea mays L.) productivity, modeled by multiple linear regression. For that, an experimental delinquency in random order was used in a 2 × 2 factorial scheme, from two populations (45,000 and 65,000 ha-1 plants) and two spacings (0.45 and 0.90 m), with 20 replicates. Soil attributes and maize production components were evaluated. The soil attributes evaluated were bulk density, macroporosity, microporosity, total porosity, soil moisture and mechanical resistance to penetration, at depths of 0-0.15 and 0.15-0.30 m. The maize production components were plant height (PH), height of the first ear insertion (HEI), stalk diameter (SD), number of rows per ear (NRE) and number of grains per row (NGR). There was a positive correlation between the variables and production per hectare, except for grain moisture, soil moisture, macroporosity (0.15-0.30 m) and microporosity (0.00-0.15 m). The number of ears per hectare, the number of grains per row and the 100-grain weight served to estimate maize productivity. The methodology applied in this study was adequate for estimating production with an accuracy of 98% and can be applied to other experiments.
Yield and Yield Components of Maize as Affected by Planting Density
ABSTRACT An experiment was carried out to investigate the effect of planting density on growth, development, yield and yield components contributing characteristics of maize during the period of November, 2012 to March 2013 in the Research Field and Laboratory of Crop Physiology and Ecology Department, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh. The experimental area belongs to Old Himalayan Piedmont Plain (AEZ-1) of Bangladesh having sandy loam soil with pH 6.1. The experimental treatments were five plant spacing (S1=75 cm X 25 cm, S2 =75 cm X 20 cm, S3=60 cm X 25 cm, S 4=65 cm X 20 cm and S5=50 cm X 25 cm) corresponding to 35,000, 50,000, 60,000, 80,000, 95,000 plants ha -1 respectively with one maize variety. The experiment was laid out in a single factor Randomized Complete Block Design (RCBD) with four replications. The experiment plots were divided into four blocks each representing a replication. Growth parameters, some phenological parameters such and some yield and yield attributes increased with decreased in plant the plant population. The highest grain yield of 5.65 t/ ha was produced at (S5 ) high planting density (95,000 plants ha -1 ) and the lowest grain yield of 4.21 t/ha was produced at (S 1 ) lowest planting density (35,000 plants ha -1 ).
Maize yield variations in Northern Serbian and Eastern Croatian regions
2012
This study evaluates maize yield variations in the Autonomous Province of Vojvodina (Serbia) and Eastern Croatia (Croatia) over a period of eight years. The effect of precipitation and mean air temperatures on maize yields was analysed during June through August, using the weather data issued by the State Hydrometeorological Institutes based in Belgrade (Serbia) and Zagreb (Croatia). Data on total acreages and average yields of maize were obtained from the Serbian and Croatian Statistical Yearbooks (2000-2009). The analysis covering the eight-year period showed that the years 2000 and 2003 were highly unfavourable for maize production (the twoyear yield average in Vojvodina and Eastern Croatia being 3.1 t ha-1 and 3.9 t ha-1, respectively), as opposed to the two “favourable” years (2005 and 2006) giving an average of 6.2 t ha-1 (Vojvodina) and 6.7 t ha-1 (Eastern Croatia). During the June-August period, the measured precipitation values for the “unfavourable years” averaged 91.5 mm ...
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...
Journal of Agronomy and Crop Science, 1997
Maize hybrids that yield well, mature earlier with low grain moisture contents, tolerate higher population densities and take advantage of narrow row spacings better than the currently available hybrids would be more suitable for production in short-season areas. Leafy reducedstature maize hybrids, which have only recently been developed, have traits which address these criteria. The objective of this study was to evaluate the effects of different population densities (65 000 and 130000 plants ha"') and planting patterns (single rows 76 cm apart and paired rows with 20 cm between rows within a pair of 56 cm between rows of adjacent pairs) on the yield and yield components of two leafy reduced-stature (LRSl and LRS2), one non-leafy reduced-stature (NLRS), and two conventional corn hybrids (Pioneer 3979, <2500 CHU; and Pioneer 3902, 2600-2700 CHU) at two locations. All hybrids had higher kernel numbers per row and single plant grain yields at the lower population densities when in paired rows. However, as plant density increased, these variables decreased more in the conventional hybrids than the LRS and NLRS hybrids, which demonstrates the greater tolerance of the latter to the stresses associated with higher plant densities. Grain yield was higher for the two LRS hybrids and the NLRS hybrid at 130000 plants ha~' than 65000 plants ha '. Grain yield of conventional hybrids was reduced at the higher population density. The LRS hybrids matured before both conventional hybrids and out yielded Pioneer 3979 at the higher plant population density in both row spacings at both sites. Harvest index was not affected by population density and this value was not different among the NLRS and conventional hybrids. However, the harvest index of the LRS hybrids was greater than the others. LRS and NLRS hybrids had lower moisture contents and earlier maturities than conventional hybrids. Rapid growth of the first ear and higher harvest index values might are indications that LRS hybrids are more tolerant of higher population densities than the conventional hybrids.
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).