Abstract
Cyperus esculentus L. leaves (CLL) are agricultural by-products produced from Cyperus esculentus L. harvesting, and can be used as livestock feed despite their low economic value for human consumption. This study aims to develop a favorable approach to processing Cyperus esculentus L. by-product as coarse fodder. The chopped CLL was pretreated by (1) mixing with canola straw at a 4:1 ratio, or (2) wilting it for 8 h, then it ensiling with or without compounded lactic acid bacteria (LAB) additives for 60 days. Our results demonstrated that compounded LAB additives: improved CLL silage fermentation quality by increasing acetic acid and lactic acid contents and decreasing ethanol and ammonia-N contents; preserved nutrients by raising the level of crude protein and water soluble carbohydrates; modified the bacterial community by increasing the relative abundance of Lactobacillus while decreasing the relative abundance of undesirable Enterococcus; and also might improve animal health by increasing the relative concentrations of antioxidant substances (such as 7-galloylcatechin) and antibacterial compounds (such as ferulic acid). This study provides strong evidence that Cyperus esculentus L. by-product can be a potential livestock feed after being ensiled with compounded LAB additives.
Highlights
The perennial herb Cyperus esculentus L. comes from the family Cyperaceae, and is known as tiger nuts [1,2,3]
The harvested Cyperus esculentus L. leaves (CLL) were divided into two groups: the Sample 1 (S1) group was mixed with canola straw at a 4:1 ratio, while the Sample 2 (S2) group wilted for 8 h
After it was mixed with canola straw at a 4:1 ratio in the S1 group, the dry matter (DM) content was 37.20%; the crude protein (CP) content was 5.17% DM; the neutral detergent fiber (NDF), acid detergent fiber (ADF), and acid detergent lignin (ADL) concentrations were
Summary
The perennial herb Cyperus esculentus L. comes from the family Cyperaceae, and is known as tiger nuts [1,2,3]. After it was first introduced to China in 1952, it was widely planted due to its resistance to cold temperatures, drought, waterlogging, barrenness, salt, and alkaline conditions; the productivity of Cyperus esculentus L. tubers can reach. Cyperus esculentus L. is comprised of above-ground leaves, underground tubers and roots [5]. The nutritional value of these plant parts means that Cyperus esculentus. Cyperus esculentus L. leaves (CLL) is a source of polysaccharides, fiber, and antioxidant compounds (such as vitamin E and polyphenols).
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