Determination of The Feed Value of Guar Bean (Cyamopsis tetragonoloba L.) Harvested at The Different Cutting Ages

Project no. 22212 · Status: Kapanmış (Yayın bekleniyor) · 2020

Summary

In this study, it was aimed to determine the potential feed value of guar bean (Cyamopsis tetragonoloba L.). The plant was harvested at six different cutting ages (beginning, middle and end of flowering and pod formation). In the first stage, the nutrient composition, gas production and enzyme-soluble organic substance were detected in guar bean. Relative feed value, metabolizable energy and net energy lactation were determined by using these data.As the harvest time lengthened, dry matter content increased significantly (P<0.05). Additionally, delaying the cutting age increased the organic matter and crude fiber levels and decreased crude protein and crude ash amounts in dry matter basis (P<0.05). Ether extract values were similar at the beginning of flowering, the end of flowering and the beginning of pod formation. While the ether extract content decreased significantly in the middle of flowering, it increased in the middle and the end of pod formation. The highest and lowest nitrogen free substance levels were determined at the beginning of flowering and the end of pod formation, respectively.Plant cell wall components (neutral detergent fiber, acid detergent fiber, acid detergent lignin and cellulose) significantly increased (P<0.05) when harvest time was extended. Hemicellulose content decreased significantly at the middle and the end of flowering compared to the beginning of flowering (P<0.05). A similar change was observed during the pod formation periods.At all cutting ages, in vitro gas production increased significantly until the 24th hour (P<0.05). Compared to the 24th hour of incubation, the amount of gas produced tended to increase in the 48th hour and rised significantly in the 72nd and 96th hours (P<0.05). Statistically, gas production amounts at the 72nd and 96th hours were similar.Metabolizable energy values calculated using nutrient composition and in vitro enzymatic method findings decreased as cutting age delayed (P<0.05). Similarly, digestible dry matter, dry matter intake and relative feed value decreased as the plant matured (P<0.05). However, metabolizable energy and net energy lactation, which were determined based on the amount of in vitro gas production, did not differ significantly according to the cutting age.As a result, it was concluded that the gum bean, which grown in the climatic conditions of Izmir province, can be used as a forage crop in animal nutrition, considering its nutritional composition and feed value.

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