Effects of molasses addition and pretreatment on forage quality of rape straw micro-storage

doi:10.14088/j.cnki.issn0439-8114.2025.02.021

Abstract

Abstract: Effects of molasses addition （0%, 5% and 10%） and pretreatment （high temperature cooking, aerobic pretreatment and high temperature cooking combined with aerobic pretreatment） on forage quality of rape straw micro-storage were analyzed. The results showed that within the high-temperature cooking pretreatment, the CP and WSC content of ensiled rape straw feed increased from 3.55% to 7.07% and 0.56% to 1.23% respectively, with the increase of molasses addition. DM content decreased from 33.02%, and pH declined from 4.44 to 4.08. While ADF and NDF content decreased by 14.16% and 12.16% respectively, with the increase of molasses addition. Within the aerobic pretreatment, the CP and DM contents of ensiled rape straw feed increased slightly with the increase of molasses addition, while pH declinced from 5.38 to 4.02, and WSC, ADF and NDF content decreased by 0.46%, 7.66% and 7.43%, respectively. Within the combination of high temperature cooking and aerobic pretreatment, the CP and WSC contents of ensiled rape straw feed increased from 6.66% to 11.06% and 0.49% to 0.97% respectively, with the increasing of molasses addition. While non-significant change was detected for DM, ADF and NDF contents. Therefore, the addition of molasses could effectively improve the fermentation quality of rape straw micro-storage, no matter what kinds of pretreatment adopted. In addition, the optimal amount of molasses addition was 10% based on the fresh amount of rape straw.

Key words: rape straw, micro-storage, pretreatment, molasses addition, forage quality

CLC Number:

S816.53

WANG Yan, LIU Heng-heng, WU Yu-peng, LIU Bin, ZHANG Yan-yan, XU Zhi-yu. Effects of molasses addition and pretreatment on forage quality of rape straw micro-storage[J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(2): 138-143.

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