Turkish Journal of Field Crops

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

EFFECTS OF PHOSPHORUS FERTILIZER AND PHOSPHORUS SOLUBILIZING BACTERIA APPLICATION ON CLOVER DOMINANT MEADOW: I. HAY YIELD AND BOTANICAL COMPOSITION

H. İbrahim ERKOVAN , M. Kerim GÜLLAP , Mahmut DAŞÇI , Ali KOÇ

Abstract

This study was carried out at Ataturk University farm in Erzurum, Turkey over 4 years (2004-2007) to evaluate the effects of phosphorus fertilization and phosphorus solubilizing bacteria (Bacillus megaterium var. phosphaticum) applications on the dry matter production and botanical composition of a natural meadow. Phosphorous fertilizer (0, 11, 22, 33, 44 kg P ha-1 ) and phosphorus solubilizing bacteria (Bacillus megaterium var phosphaticum) were added to study plots. The present study investigated the effects of applying phosphorus and phosphorus solubilizing bacteria on the yield and botanical composition of a clover-dominated meadow in the Eastern Anatolia region of Turkey. Phosphorus fertilization significantly affected dry matter yield while phosphorus solubilizing bacteria did not show any effect on dry matter yield. While phosphorus fertilization did not affect the botanical composition of grasses, the composition of legumes and other families was affected. There was not any effect of bacteria application like in dry matter yield.

Keyword: Phosphorus fertilizer, phosphorus solubilizing bacteria, dry matter, botanical composition, meadow ,

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