Study on the changes in nutritional quality of three types of forages during storage period

Hao Feier; Liu He; Zhang Yuekun; Hu Bin; Hu Xin; Huang Chun; He Suxu

doi:10.20154/j.cnki.issn1672-9692.2024.12.002

Abstract：The aim of this study was to investigate the effects of different storage times(0,60,120 and 180 d)on the nutritional quality of three forage species(Quercus mongolica leaves,Leymus chinensis,and alfalfa).Samples were collected after 0,60,120,and 180 days of storage,and the contents of basic nutrients,vitamins,mycotoxins and microbial quantity in the leaves of Quercus mongolica leaves,Leymus chinensis,and alfalfa were determined to determine the best storage period.The results showed that the nutrient content of forage decreased gradually with the extension of storage time,and the quality changed greatly after 120 days of storage.The crude protein content of the three forage species began to decrease after 120 days of storage,and was the lowest at 180 days.With the extension of storage time,the contents of neutral detergent fiber and acid detergent fiber increased gradually.The losses of VC,VA and VE were significant,and alfalfa was the most obvious,followed by Leymus chinensis.With the extension of storage time,the water content of the three forage species increased first and then decreased under seasonal influence.The changes of microbial content were positively correlated with the changes of water content,and reached the peak value at 120 days,when fumonisin and deoxynivalenol were detected in all three forage species,and the highest content was found in alfalfa.The results showed that the nutritional quality of the three different types of herbage decreased during indoor natural storage.It is recommended that the storage time of herbage at room temperature should be controlled within 120 days to ensure the best nutritional value.