Manipulation of Rumen Fermentation with Organic 
 Acids Supplementation in Ruminants Raised in the Tropics

The nutritive value of ensiled grass can be modified by the fermentation process. Compared to industrial fermentation, silage fermentation is still a relatively uncontrolled process. Consequently, considerable variation in the pattern of silage fermentation occurs on farms (Wilson and O'Kiely, 1990). This makes animal performance difficult to predict accurately and may alter the composition of the most appropriate concentrate to be fed with the silage. The objectives of the present experiment were (1) to compare the growth and rumen fermentation in cattle fed silage, where silage fermentation was altered using organic acids and (2) to determine the relative effects on growth when the silages were supplemented with two forms of concentrate.

Download Full-text

Development of feeding systems and strategies of supplementation to enhance rumen fermentation and ruminant production in the tropics

Journal of Animal Science and Biotechnology ◽

10.1186/2049-1891-4-32 ◽

2013 ◽

Vol 4 (1) ◽

Cited By ~ 43

Author(s):

Metha Wanapat ◽

Sungchhang Kang ◽

Sineenart Polyorach

Keyword(s):

Rumen Fermentation ◽

The Tropics ◽

Feeding Systems

Download Full-text

Strategic supplementation of cassava top silage to enhance rumen fermentation and milk production in lactating dairy cows in the tropics

Tropical Animal Health and Production ◽

10.1007/s11250-018-1593-8 ◽

2018 ◽

Vol 50 (7) ◽

pp. 1539-1546 ◽

Cited By ~ 6

Author(s):

Metha Wanapat ◽

Kampanat Phesatcha ◽

Bounnaxay Viennasay ◽

Burarat Phesatcha ◽

Thiwakorn Ampapon ◽

...

Keyword(s):

Dairy Cows ◽

Milk Production ◽

Rumen Fermentation ◽

Lactating Dairy Cows ◽

The Tropics

Download Full-text

Organic acids production by rhizosphere microorganisms isolated from a Typic Melanudands and its effects on the inorganic phosphates solubilization

Acta Agronómica ◽

10.15446/acag.v66n2.56148 ◽

2017 ◽

Vol 66 (2) ◽

Cited By ~ 1

Author(s):

Eduardo José Serna Posso ◽

Marina Sánchez de Prager ◽

Carlos Adolfo Cisneros Rojas

Keyword(s):

Organic Acids ◽

Aluminum Phosphate ◽

Iron Phosphate ◽

Available Phosphorus ◽

Rhizosphere Microorganisms ◽

The Media ◽

Organic Acid Secretion ◽

The Tropics ◽

Inorganic Phosphates ◽

P Sources

It has been established that organic acid secretion by rhizosphere microorganisms is one of the mechanisms to solubilize the phosphorus (P) attached to insoluble mineral compounds in soil. This action is an important biotechnological alternative, especially in those soils where high fixation of this nutrient occurs, a very common situation in the tropics. This research evaluated the ability performed by five bacterial and five fungal isolates from Typic Melanudands soil to produce organic acids and generate available phosphorus from insoluble P sources. Given these concerns, the selected microorganisms were replicated for 7 days in liquid medium Pikovskaya (PVK) modified sources tricalcium phosphate (P-Ca), aluminum phosphate (P-Al) and iron phosphate (P-Fe). The results indicated that phosphorus availability in the media, correlates positively with the organic acids production in each of the sources used (P-Ca (0.63), P-Al (0.67) and P-Fe (0.63). In turn, the chemical processes linked to the phosphates solubilization (e.g., Ca availability) affected the development of the microorganisms tested. Both, fungi and bacteria varied in their ability production and type of metabolized organic acids, the most frequent were as follows: citric and gluconic acid.

Download Full-text