Seasonal Quality Assessment of Leaves and Stems of Fodder Ligneous Species

Abstract

The objective of this research was to investigate the effect of seasonality on the chemical composition and concentration of phenolic compounds in some ligneous species. The research was conducted at the Aristotle University’s farm, Thessaloniki, Greece. From five ligneous species (Robinia pseudoacacia var. monophylla, Amorpha fruticosa, Colutea arborescens, Morus alba and Arbutus unedo) samples (leaves and twigs) were collected during two different seasons (spring and autumn). All samples were analyzed for crude protein (CP), Neutral Detergent Fiber (NDF), Acid Detergent Lignin (ADL) and in vitro dry matter (DM) digestibility (IVDMD), as well as for total phenols (TPH), total tannins (TT) and condensed tannins (CT). The CP content was generally lower and higher in leaves and stems of A. unedo and R. pseudoacacia, respectively compared to the other tested species. A. unedo had the highest values in NDF and ADL in leaves and the highest ADL content in stems. M. alba and C. arborescens in leaves and C. arborescens in stems had the lowest values of ADL content. M. alba had the significantly highest value in IVDMD and A. unedo the lowest one in both leaves and stems. Season had no significant effect on TPH, TT, and CT of leaves, while in stems they were significantly higher in autumn. A. unedo had the highest concentration of TPH, TT and R. pseudoacacia of CT in the leaves. TPH, TT, and CT concentration in stems was significantly higher in A. unedo. According to the findings, the impact of maturation on the type and the concentration of phenols and tannins is species-dependent.

The effects of fumaric and malic acids on the in vitro true digestibility of some alternative feedstuffs for ruminants

“…Özyılmaz (28) reported that TFW had 93.42% DM, 14.07% CP, 4.69% ash, 1.07% EE, 47.76% NDF and 40.93% ADF levels and that these values varied according to the organic or conventional cultivation of the tea plants and their harvest periods. Parissi et al (29) and Luginbuhl and Mueller (24) reported that R. pseudoacacia leaves had 27.3% CP (g/100g DM) and 28.0% (g/100g DM) respectively, which is consistent with the results of the present study.…”

MOROCCAN STRAWBERRY TREE (Arbutus Unedo L.) LEAVES: COMPARATIVE STUDY OF THE NUTRITIONAL VALUE AND MINERAL COMPOSITION

“…Crude protein is a key factor to discuss the quality of forage (Amiri, 2012), as mentioned in table 2, the protein content in A. unedo leaves (average value of 7.17 g/100 g of DW) was within the range of other works, which reported content of 7.2 and 6.8 g/100 g of DW (Tisserand & Faurie, 1994;Boubaker et al, 2004). However, a study conducted by Parissi et al (2018) showed higher protein content (10.8 g/100 g of DW) as compared to this study. Generally, it was reported that protein content in A. unedo leaves was found to exceed the required demands of small ruminants (Parissi et al, 2018).…”

“…However, a study conducted by Parissi et al (2018) showed higher protein content (10.8 g/100 g of DW) as compared to this study. Generally, it was reported that protein content in A. unedo leaves was found to exceed the required demands of small ruminants (Parissi et al, 2018).…”

“…Dietary fiber, the abundant component of total carbohydrates (25 %), was shown in an average value of 17.06 g/100 g DW, and this was reported higher than the content (16.5 g/100g DW) reported by Tisserand & Faurie (1994). It is suggested by several studies that the potential use of A. unedo leaves alongside others in animal feed, it presented considerable amounts of NDF (Neutral Detergent Fiber) and ADL (Acid Detergent Lignin), with a value of 43.6 and 11.5 g/100g respectively (Ammar et al, 2005;Parissi et al, 2018). Also, dietary fiber has a great effect on the effectiveness of phenolic compounds, especially during their passage through the digestive tract, by protecting their physicochemical structure, and provides this species with the particularity of being an important source of polyphenols, allowing its potential use as a functional food in addition to its high nutritional value (Jardim et al, 2017;Stephenie et al, 2020).…”

Effect of cutting height on nutritional characteristics of three agroforestry tree legume species and their feed supplement value on Chloris gayana Kunth.

“…The low total polyphenol content in this study may be explained by a combination of proportion of stem and leaves in the samples and seasonal fluctuations. Parissi et al (2018) found higher total polyphenol content in leaves than stems and lower content in autumn than spring for different browse species. However, our values were similar to those found by Rubanza et al (2006) and Mokoboki (2011) for Acacia spp.…”