Turkish Journal of Field Crops

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FORAGE POTENTIAL OF COWPEA (Vigna unguiculata L. WALP)

Ilknur AYAN , Hanife MUT , Ugur BASARAN , Zeki ACAR , Ozlem Onal ASCI

Abstract

Nine Cowpea (Vigna unguiculata L. Walp) genotypes were assessed for forage yield and quality features during 2005 and 2006 summer growing season at two locations (Samsun and Kavak) in Turkey. Experiments were established on May and arranged in a randomized complete block design with 3 replications in both years and locations. Although cowpea is not grown for forage purposes, their forage yield and quality are desirable in experiment conditions. Forage yield significantly (P<0.01) affected by genotype, year and location and ranged between 6.03 and 7.94 t ha-1 among genotypes over the years and locations. No differences were found in crude protein (CP) among cultivars and years, which ranged from 170.2 g kg-1 for cultivar Akkiz up to185.2 g kg-1 for genotypes G3, G4 over the years and locations. There were no significant differences among genotypes for ADF, NDF, Mg and P contents. P, Mg, Ca and K contents in all the genotypes were higher than animal needs in both locations. In general, cowpea genotypes had higher forage yield, CP and lower ADF and NDF at Samsun compare to Kavak location.

Keyword: Cowpea, forage yield, protein, ADF, NDF, mineral mater, Turkey ,

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