Turkish Journal of Field Crops

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2. Beyler İş Hanı, No: 313 Kat: 3 Konak-İzmir

THE INFLUENCE OF PRE-PLANT TREATMENTS ON SILAGE MAIZE (Zea mays L.) YIELD IN NO-TILLAGE SYSTEM

Yasar OZYIGIT

Abstract

No-tillage agricultural practices and pre-plant applications in agricultural systems have become quite common in recent years. In this study, the effect was examined of pre-plant applications on agronomic characteristics and yield in silage maize cultivation under no-tillage conditions. Plants of the forage legumes (common vetch, narbon vetch and fodder pea) and cereals (barley, triticale and annual ryegrass) were used as pre-plants materials and the values of plant height, green herbage yield, dry matter ratio, dry matter yield, leaf/stem ratio, peak tasselling time and core tasselling time were determined in silage maize. The data obtained demonstrated, that the green herbage yield and dry matter yield of maize was higher when the forage legume plants were used as pre-plants. Among the legumes, common vetch increased maize green herbage yield and dry matter yield more than other plants. On contrast, plants of the in cereals family caused a decrease in the maize yield. It was concluded that legume plants should be selected as pre-plant in no-tillage silage maize cultivation. Good results were obtained especially from common vetch, and the use of cereals as pre-plant had a negative effect on the maize for silage grown subsequently.

Keyword: Cereals, legumes, maize, plant residue, stubble sowing ,

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