Effect of water extract from spent mushroom substrate after Ganoderma balabacense cultivation by using JUNCAO technique on production performance and hematology parameters of dairy cows

Abstract The spent mushroom substrate of G anoderma balabacense cultivation ( SMSGB ) contains a large amount of bioactive substances. However, the potentials of SMSGB for improving milk production in dairy cows have not been thoroughly studied. In this study, the effects of hot water extract ( HWE ) from spent mushroom substrate after G . balabacense cultivated with JUNCAO , the herbaceous plants long‐known to be suitable for cultivating edible and medicinal fungi, on production performance and hematology parameters of dairy cows, were determined. Holstein dairy cows were fed different doses of HWE . After a 60‐day administration period with 100 g/day of HWE , milk yield, milk protein and triglyceride ( TG ) levels increased by 4.02% ( P < 0.01), 4.49% ( P < 0.05) and 32.65% ( P < 0.05), respectively; somatic cell count ( SCC ) and alanine aminotransferase ( ALT ) were significantly decreased ( P < 0.05). The production performance of dairy cows suggests that HWE with SMSGB treatment is effective in improving milk yield ( P < 0.01) and hematology parameters of dairy cows, and may be useful as a functional feed additive.