scholarly journals The effects of sowing date on yield of silage corn hybrids

2014 ◽  
Keyword(s):  
Sowing Date ◽  
Corn Hybrids

scholarly journals Effect of growth regulators and sowing date on the agronomic performance of corn hybrids in the first cropping year

2019 ◽  
Vol 40 (6Supl2) ◽  
pp. 2861
Author(s):  
André Prechlak Barbosa ◽  
Claudemir Zucareli ◽  
José Henrique Bizzarri Bazzo ◽  
Luis Abilio Ribeiro Alves ◽  
Renan Iastrenski
Keyword(s):  
Grain Yield ◽  
Leaf Area ◽  
Growth Regulators ◽  
Block Design ◽  
Sowing Date ◽  
Grain Weight ◽  
Index Number ◽  
Corn Hybrids ◽  
Yield Performance ◽  
Area Index

Growth regulators can be an important tool in corn crop management, especially in technology-intensive crops grown in densified spatial arrangements, under favorable environmental conditions, and using genotypes with greater vegetative development. The objective of this study was to evaluate the effect of growth regulators associated with sowing date on the growth characteristics, yield components, and grain yield of first-crop corn hybrids. The experiment was performed on a 2014/15 field crop, under a randomized complete block design with four replicates. Treatments were placed in a 2 × 2 × 3 factorial arrangement consisting of two sowing dates (first: 09/19/2014 and second: 11/23/2014), two corn hybrids (2B610PW and 2B810PW), and three conditions of growth regulators (control without application, 400 g a.i. ha-1 trinexapac-ethyl, and 200 g a.i. ha-1 clomazone, both applied when six fully expanded leaves were observed). The following characteristics were evaluated: plant height, ear insertion height, stem diameter, leaf area index, number of rows per ear, number of grains per row, number of grains per ear, ear length, ear diameter, prolificacy, thousand grain weight, and grain yield. Corn development and yield performance were altered by the interaction between sowing date, genotypes, and growth regulators. The second sowing date, which was not limited by water deficiency, resulted in better development and yield performance for the two hybrids. The 2B610 hybrid had a higher yield performance than did 2B810 in the second sowing date. Trinexapac-ethyl and clomazone contributed to higher corn grain yield from the two hybrids at the first sowing date and from the 2B810 hybrid at the second date. Trinexapac-ethyl reduced the size of the 2B810 hybrid at the second date. The growth and leaf area of the 2B810 hybrid were less affected by the restrictive conditions of the first sowing date; consequently, there was a higher grain weight performance that did not allow the differentiation of yield between genotypes for this sowing date.

scholarly journals Examination of the population density and sowing date of different maize genotypes in the Hajdúság region

2012 ◽  
pp. 111-115
Author(s):  
Károly Máriás ◽  
Péter Pepó
Keyword(s):  
Statistical Difference ◽  
Plant Density ◽  
Sowing Date ◽  
Homogeneous Field ◽  
Corn Hybrids ◽  
Sowing Time ◽  
Average Temperature ◽  
Significant Difference ◽  
Plant Densities ◽  
Late Sowing

The experiment was carried out 6 km from Debrecen, next to the main road 47 on a homogeneous field on brown forest soil. Five corn hybrids were tested in the trial (DKC 4795, DKC 4995, KWS Kornelius, NK Cobalt, PR37 N01) at three different sowing times (early – 5th April, average – 21st April, late – 10th May). At each sowing time, three different plant densities were applied (modest – 58 500 plants ha-1, average –70 200 plants ha-1, high – 82 300 plants ha-1). The agrotechnics appliedin the experiment satisfied the requirements of modern corn cultivation. In the study, the best yield result was achieved with the early sowing time out of the three examined sowing times (11 315 kg ha-1), which was significantly different (LSD5%=495 kg) from that of the average sowing time (10 690 kg ha-1), however, there was no statistically justifiable difference between the yield results of the early and the late sowing times. There was a significant difference also between the average and late sowing time. Our results indicate that the different sowing times resulted in a different flowering times. Consequently, the stands of early and late sowing time reached this critical stadium of growth under proper climatic circumstances (precipitation: 39 mm and 136 mm, average temperature at flowering: 18.1 oC and 20.3 oC), while flowering in the case of the average sowing time of 21st April was in the first half of July and the average temperature at flowering was warmer (23.2 oC) with only 10 mm precipitation.In the experiment, the plant density response was also examined. According to the measured data, four of the five hybrids responded badly to the increasing plant density. We found that the plant density of 58 500 plant ha-1 gave the largest yield results (DKC 4995 11 794 kg ha-1 – NK Cobalt 10 998 kg ha-1, average of five hybrids: 11 430 kg ha-1), while the lowest yields were obtained at the plant density of 82 300 plant ha-1 (KWS Kornelius 11 037 kg ha-1 – NK Cobalt 10 019 kg ha-1, average of five hybrids 10 720 kg ha-1). The difference between the two plant densities was significant (LSD5%=494 kg), however, the 70 200 plant ha-1 plant density did not show any statistical difference from neither the 58 500 ha-1 nor from the 82 300 plant ha-1 stands. When examining the data of the hybrids separately, we found that there was a significant difference between the average yield of the lowest and highest plant densities only in the case of three (DKC 4795, DKC 4995, NKCobalt) out of the five hybrids (DKC 4795: 11 757 kg ha-1 – 10 857 ha-1 where LSD5% =816 kg; DKC 4995: 11 794 kg ha-1 – 10 738 kg ha-1 where LSD5%=853kg; NK Cobalt: 10 998 kg ha-1 – 10 019 kg ha-1 where LSD5%=630 kg ha-1), while a  significant difference between the second and third plant densities was observed only in one case (DKC 4995: 11 726 kg ha-1 – 10 738 ha-1 where LSD5%=853 kg). In all other cases, there was no statistical difference between the differentplant densities.

Effect of sowing date and nitrogen on yield, components yield and oil characteristic of medicinal flax

Planta Medica ◽  
2009 ◽  
Vol 75 (09) ◽  
Author(s):  
MM Rahimi ◽  
G Normohamadi ◽  
A Aeinehband
Keyword(s):  
Yield Components ◽  
Sowing Date

Investigations of alternative kale management: Production, regrowth and quality from different sowing and defoliation dates

2007 ◽  
pp. 29-33 ◽  
Author(s):  
H.E. Brown ◽  
S. Maley ◽  
D.R. Wilson
Keyword(s):  
Sowing Date ◽  
Linear Increase ◽  
Thermal Time ◽  
Total Production

Gruner kale showed a linear increase (8.0 kg DM/ha per °Cd) in biomass with sowings on 1 October, 3 November and 1 December producing 23, 19 and 17 t DM/ha (respectively) by the 29 May. Regrowth following mid season defoliation was slow (5.3 kg DM/ha per °Cd) reducing total production (relative to undefoliated) by 7.5 and 5.5 t DM/ha for treatments defoliated on the 29 January and 14 March, respectively. Keyworks: defoliation, kale, quality, regrowth, sowing date, thermal time, yield

Productivity of corn hybrids of different fao groups depending on microfertilizers and growth stimulants under irrigation in the south of Ukraine

2016 ◽  
Vol 3 (1) ◽  
pp. 55-60
Author(s):  
Yu. Lavrynenko ◽  
R. Vozhegova ◽  
O. Hozh
Keyword(s):  
Grain Quality ◽  
Laboratory Method ◽  
The South ◽  
Corn Hybrids ◽  
Early Maturity ◽  
Effi Ciency ◽  
Grain Moisture ◽  
Grain Productivity ◽  
The Impact

The purpose of the research is to identify effi cient microfertilizers and growth stimulants considering biologi- cal features of new corn hybrids of different FAO groups under irrigation conditions in the South of Ukraine and trace their impact on grain productivity of the plants. The methods of the research are the fi eld method – to study the interaction of the research object with experimental factors of the natural environment, to register the yield and evaluate the biometrical indices; the laboratory method – to measure soil moisture, grain moisture content and grain quality indices; the statistical method – to evaluate the reliability of the obtained results; the calculation methods – for economic and energetic assessment of the growing techniques used. The results of the research. The paper defi nes the impact of microfertilizers and growth stimulants on the yield and grain quality of the corn hybrids of different maturity groups and on the economic effi ciency of growing them. The conclusions of the research. Under irrigation conditions of the Southern Steppe of Ukraine it is recommended that the following hybrids should be grown in dark-chestnut soils: early maturity DN Pyvykha, medium-early Skadovskyi, medium maturity Kakhovskyi and medium-late Arabat, using the growth stimulants – treating the seeds with Sezam-Nano and fertilizing with Grainactive at the stage of 7–8 leaves.

EFFECT OF SOWING DATE ON GRAIN YIELD OF CRAB GRASS

2001 ◽  
Vol 49 (3) ◽  
pp. 293-297
Author(s):  
S. O. Bakare ◽  
M. G. M. Kolo ◽  
J. A. Oladiran
Keyword(s):  
Grain Yield ◽  
Interaction Effect ◽  
Significant Interaction ◽  
Sowing Date ◽  
Yield Data ◽  
Significant Interaction Effect ◽  
Sowing Dates

There was a significant interaction effect between the variety and the sowing date for the number of productive tillers, indicating that the response to sowing date varied with the variety. A significant reduction in the number of productive tillers became evident when sowing was delayed till 26 June in the straggling variety as compared to sowing dates in May. Lower numbers of productive tillers were also recorded when the sowing of the erect variety was further delayed till 10 July. The grain yield data showed that it is not advisable to sow the straggling variety later than 12 June, while sowing may continue till about 26 June for the erect variety in the study area.

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