Turkish Journal of Field Crops

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GRAIN YIELD, FORAGE YIELD AND FORAGE QUALITY OF DUAL PURPOSE WHEAT AS AFFECTED BY CUTTING HEIGHTS AND SOWING DATE

Ibrahim ATIS, Muzaffer AKAR

Abstract

Dual purpose wheat production can help to produce the forage needed for livestock feeding, without reducing the sowing area of reserved for grain production. To determine the proper management techniques that reduce the loss of grain yield crops in dual purpose systems is very important. The objectives of this study were to investigate the effects of sowing date and cutting heights on grain yield, forage yield and nutritive value of dual-purpose wheat. The experimental design was split-plot under randomized complete block design, sowing dates (early, normal and late) as the main plot treatments and cutting heights (5, 7.5 and 10 cm) as the subplot treatments with three replications. Forage yield and forage protein yield were significantly affected by sowing date. Maximum forage yield and forage protein yield were obtained at normal sowing date (20 November) in both years, while maximum grain yield was obtained at early sowing date (20 October). The effect of sowing date on forage quality characters varied between years. Deeper cutting increased forage yield, while decreased grain yield. The effects of cutting heights on forage quality were different between years. The cutting treatments caused the decrease yield of the grain, but dual-purpose system for winter wheat was an advantageous crop system when evaluated in terms of the total amount of production. The height of 7.5 cm can be recommended as a suitable cutting height in term of the total crop quantity.

Keyword: Cutting height, dual-purpose, forage yield, grain yield, sowing date, wheat ,

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