Research Note: Utilizing Hazelnut Kernel Oil Meal in Layer Diets

Abstract

The present study was conducted in order to investigate the possibility of utilizing hazelnut kernel oil meal (HKOM) in layer diets as a replacement for soybean oil meal (SBM). Two hundred and sixteen brown egg layers raised in contiguous wire cages were used. The duration of the experiment was 24 wk consisting of six periods of 4 wk. In the trial, six diets containing different levels of HKOM replacing 0, 20, 40, 60, 80, and 100% of SBM protein, respectively, were utilized as the treatments. Differences among the diets in terms of egg yield, feed consumption, feed efficiency ratio, egg weight, egg yolk and albumen ratios, shell thickness, shell weight, and Roche color values of the yolk were not statistically significant (P greater than .01). Results indicated that SBM could be replaced totally by HKOM in layer diets. However, replacement of more than 40% of SBM with HKOM is not recommended.

A preliminary study on the utilization of hazelnut meal as a substitute for fish meal in diets of European sea bass (Dicentrarchus labrax L.)

“…The analysed essential amino acid composition of HM reveals that its methionine and lysine levels are lower than FM. On the other hand, HM used in the present study has higher amino acid levels than that of HM used by Úzen and Erener (1992). This may result from the use of di¡erent hazelnut variety/ varieties in HM production.…”

“…Variation of nutrient levels among the hazelnut cultivars in Turkey was also noted by Úzdemir and Aknc (2004) and K˛ksal et al (2006). However, studies on HM in poultry so far have show that the protein level of HM is always higher than 39% (Úzen & Erener 1992;Erener et al 2003;Yalc°n, Ogfl uz & Yalc°n 2005).…”

“…However, in this study a fixed ration was fed, not an ad libitum or satiation level. Elevated levels of HM in diets of Japanese quail fed ad libitum did not affect feed intake (Özen & Erener 1992; Erener et al 2003). However, Bilgin et al (2007) attributed the reduced body weight of rainbow trout fed a diet including 30% HM to its low preference.…”

“…It should, however, be pointed out that in their study the FW of fish fed 30% HM was lower than that of the control group. An investigation in layer revealed that total replacement of SBM by HM could be possible (Özen & Erener 1992). Erener et al (2003) also found out that diets including HM supplemented with synthetic lysine and methionine could totally replace SBM in Japanese quail ( Coturnix coturnix Japonica ).…”

“…In addition, it is available at a substantially low price as compared with FM in Turkey. So far, its nutritional value has been investigated in terrestrial animals such as ruminants (Sarc°ic°ek 1999;Karsli, Tasal & Nursoy 2006) and poultry (Úzen & Erener 1992;Erener, Úzer & Ocak 2003). However, there is only one study indicating its use in rainbow trout diets as a source of protein in lieu of soybean meal (SBM) (Bilgin, Tˇrker & Ergˇn 2007).…”