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Effects of UV radiation on the process of wilting and application of additives at ensiling on the fermentation quality of Siberian wildrye silage on the Qinghai‐Tibetan plateau
Author(s) -
Li Ping,
Tang Haiyang,
Feng Tao,
Zhang Yu,
Qu Hui,
Bai Shiqie,
Shen Yixin
Publication year - 2018
Publication title -
grassland science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.388
H-Index - 19
eISSN - 1744-697X
pISSN - 1744-6961
DOI - 10.1111/grs.12174
Subject(s) - microbial inoculant , wilting , silage , chemistry , dry matter , butyric acid , zoology , lactic acid , horticulture , fermentation , acetic acid , agronomy , food science , biology , inoculation , bacteria , biochemistry , genetics
Effects of lactic acid bacteria ( LAB ) and formic acid ( FA ) on silage quality of ultraviolet ( UV )‐radiated Siberian wildrye ( Elymus sibiricus L.) were studied on the Qinghai‐Tibetan plateau. Siberian wildrye seeds were sown in early April, 2012 and harvested in 2013, 2014 and 2016. Fresh forage was radiated for 0, 4 and 8 h under ambient/laboratory UV radiation conditions during the wilting process, and then mixed with LAB inoculant (10 5 cfu g −1 fresh matter [ FM ]) and FA (3 mL kg −1 FM ), respectively, no additives treatment as control. After additive treatments, chopped Siberian wildrye plants were packed in 30 cm × 40 cm polythene bags and stored in a dark room at ambient temperature (<15°C) for 90 days. Silages of UV ‐radiated Siberian wildrye had higher ( P < 0.05) pH and ammonia‐nitrogen (N) content, lower ( P < 0.05) acetic and propionic acid content and in vitro ruminal dry matter digestibility. Compared with control, treatments with additives (especially for inoculant LAB ) enhanced pH decline, increased ( P > 0.05) acetic acid content, decreased ( P < 0.05) butyric acid and ammonia‐N content of silages of UV ‐radiated Siberian wildrye. It was concluded that the application of FA and inoculant LAB at ensiling could reduce the negative effects of extended UV radiation on the process of wilting.