TITLE:
Effect of High Concentrate Corn Stalk Particle Size on Physical State and Production Performance of Lactating Dairy Cows
AUTHORS:
Xueyan Lin, Deqing Zhang, Lin Ju, Yiyao Zhang, Yue Jiang, Qiuling Hou, Zhiyong Hu, Yun Wang, Zhonghua Wang
KEYWORDS:
Corn Stalk, Lactating Dairy Cow, Production Performance
JOURNAL NAME:
Advances in Bioscience and Biotechnology,
Vol.12 No.2,
February
20,
2021
ABSTRACT: In order to realize the application of corn stalk in
cow feed, we designed experiments to explore the effect of a certain proportion
of corn stalk on the performance of lactating dairy cows. 9 multiparous
mid-lactating cows were allocated at random to three groups, each containing 3
intact cows. The trial consisted of three
periods and three dietary treatments with a 3 × 3 Latin square design. The diets were normal concentrats
plus dried corn stalk chopped to 5 - 8 cm long (N), high concentrates
plus dried corn stalks chopped to a length of approximately 5 - 8 cm by a mower
(H) while the milled corn stalks were passed through a pulviser with a 2 cm
pore size (MH). Each cow was measured for dry matter intake (DMI), ruminal pH,
rumen fermentation, selective feeding
behavior and production performance. The results showed that MH led to a
significantly higher intake of DM, neutral detergent fiber (NDF), forage NDF
(FNDF), acid detergent fiber (ADF), crude protein (CP) and organic matter (OM)
than N and H (P ity for the dietary
component. MH resulted in a significantly higher milk production (P P = 0.055). There were no significant differences in the milk components (P = 0.424) and lactose (P = 0.113) between cows fed N and MH.
The high-concentrates plus milled corn
stalk diet can increase the milk yield under the premise of normal rumen
pH in dairy cows, thereby generating higher economic benefits. And milled corn
stalk can effectively inhibit the cow’s selective eating of low-quality
roughage.