Turkish Journal of Field Crops

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Correlation and Path Analyses in Maize (Zea mays L.)

C. KONAK, A.ÜNAY, A. ZEYBEK, E. ACARTÜRK

Abstract

In the study, the correlations between yield and the agronomic characteristics were determined as well as important factors contributing yield in maize grown under the main and the second crop conditions in the Meander Valley. Ten maize hybrids were used as materials in the simple correlation and path analyses. The experiments were arranged in the Randomized Complete Block Design with four replications. Yield, days to silking, days to tasseling, ear height, plant height, ear diameter, car length, number of rows at car, thousand kernel weight, single leaf area, number of leaves, leaf area index were measured on randomly selected ten plants. At second crop maize, yield was positively correlated with plant height whereas it had negative and significant correlation with thousand kernel weight and ear diameter. Number of rows at ear was significantly and positively correlated with yield in both main and second crop maize. Path analysis revealed that days to silking and single leaf area had direct negative effects on grain yield while leaf area index, ear diameter and ear length with strong direct path values and ratios were the major factors contributing to yield. Negative and significant correlations between days to silking and yield, therewith negative and strong direct and indirect effects of days to silking on yield indicated that it might be a problem with late flowering hybrids due to high temperatures during their flowering times in the region.

Keyword: Yield, agronomic characteristics, maize grown ,

Effects of Different Water Stress Levels on Biomass Yield and Agronomic Traits of Switchgrass (Panicum virgatum L.) Varieties under Semi-Arid Conditio

Erdal GONULAL, Suleyman SOYLU, Mehmet SAHIN

Abstract

A field experiment was conducted in the Wielkopolska region at the Gorzyń Research Station, Poland (52.34°N, 15.54°E) in Central Europe. The study was conducted over a 3-year period (2017, 2018, 2019) as a two-factorial design with four replications in the RCBD. The aim of the research was to determine the effect of the cultivar (‘Bolero’, ‘Tytan’) and the inoculation (Nitragina–seeds inoculation, Nitroflora I–seeds inoculation, Nitroflora II–soil inoculation, HiStick® Lupin–seeds inoculation) on plant development, seeds chemical composition and yielding of narrow-leaved lupin. The weather conditions and experimental factors significantly influenced on productivity of narrow-leaved lupin ‘Tytan’. Drought during the growing season reduced seeds and protein yields. After inoculation of HiStck the seeds yield was significantly greater by 12.4% (p < 0.01) and the protein yield after application of Nitroflora I or HiStick by 13.9% (p < 0.01) and 19.2% (p < 0.01), respectively. Correlation coefficients showed strong relations between number of pods and seeds per plant in both cultivars regardless of the inoculation variant, however the strongest relations in both cultivar were proved on HiStick treatment.
Keyword: Biological nitrogen fixation, chemical composition, legumes, protein efficiency, yielding