Reproductive biotechnology to improve efficiency in rodeos

By agrosite. 09/21/2022 | 16:09




In the NEA, cattle breeding is carried out extensively and, in general, on marginal environments. Therefore, the development of technology aimed at improving the productivity of rodeos is a necessity. In this sense, a team of specialists from INTA Mercedes -Corrientes- proposes a reproductive synchronization protocol, which aims to reduce the percentage of cows in anestrus, improve rates and anticipate pregnancy. The details of this reproductive biotechnology will be presented at the next meeting of the Livestock Tour, which will take place on September 22 in Mercedes -Corrientes-.

The study of reproductive physiology –begun in the 70s– made it possible to know what happens in the female, from parturition to the first fertile heat, in order to plan her management. This period, known as postpartum anestrus, is particularly important because it is key to improving pregnancy rates in breeding herds.

To achieve this, Domingo Aguilar – INTA’s specialist in reproductive management of cattle and sheep – proposes the application of a protocol for reproductive synchronization. In other words, this means applying a series of drugs to reduce the anoestrus period and improve the biological efficiency of the animal.


“The duration of postpartum anoestrus is variable and is linked to lactation and the nutrition or body state of the animal,” said Aguilar, who pointed out the importance of positive energy balance: “For this technology to work and considerably improve pregnancy rates, it is necessary for the cow to gain weight during the service stage”.
Historically, to achieve pregnancy in the cows, it was necessary for the pasture cycle to coincide – the moment of greatest production of vegetable matter – with the need for the animals –service–. In this way, it was possible to ensure that a female begins the service process with a good body condition so that she can become pregnant.



At this point, Aguilar highlighted the role of forage resources and task planning to ensure that the cows maintain a positive energy balance. “In situations where the lack of rain affects the quantity and quality of pastures, it is necessary to consider supplementing diets with different types of rations.”

Preliminary results of a trial that was carried out in the Itá Ibotig livestock farm showed that, despite the lack of fodder – caused by the drought that has been recorded in the region since 2020 – a 44% pregnancy rate was achieved with the application of the pharmacological protocol. , compared to 40% that was registered with the canning practice, evaluated 35 days after applying both techniques.


“Although, at first glance, the numbers do not show great differences, the global trend of the application of the protocol is positive,” said Aguilar, who highlighted the long-term advantages of this practice: “Not only does it allow anticipating pregnancy at 35 days, but also considers the continuity of lactation of the calves that are at the foot of the mother, which in the long term affects more kilos at the time of weaning”.

“Our ultimate goal is for all females to produce calves and to do so in the best possible way,” Aguilar stressed.



field tests

Estancia Ita Ibotig SA is a family livestock business dedicated to breeding and rearing young bulls and heifers on pastures and corrals, as well as sheep breeding. The field has a total area of ​​8,016 hectares, of which 7,216 hectares are owned and 800 are leased. In the field there are different environments: 5,838 hectares of altitude, 1,205 of marshland, 267 of canyons and lagoons and 267 of pastures and greenery for rearing, mainly.

“This is a family business that is more than 150 years old,” said Tomás Piñeiro, director of the establishment, who added that “for many years we have been working with INTA technicians, who are first class.”

“In fact, in the 1970s, sorghum was sown in this field, which was surely an INTA idea,” said Piñeiro, stressing that “INTA’s work has a high impact on our livestock business, especially in taking of decisions. Currently, for example, the topic of rotational grazing is being discussed and here in the area they have been working on this for 40 years. And that is a scientific validation.”

ranching across the country

With a schedule that bets on touring the livestock systems of the different regions of Argentina, INTA organizes the Livestock Tour. The next stop will be on September 22 at the Itá Ibotig ranch in Mercedes, Corrientes.

Diego Bendersky -specialist in Animal Production at INTA Mercedes- indicated that “this series of meetings seeks to focus on the experience of the producer with the implementation of technologies that allow him to improve physical, economic and environmental indicators”.

“Each of the days will have stops. In the first one, the company is introduced (in this case it is a family business) and, then, two more stops where a problem is shown and the way in which the producer proposes to solve it”, synthesized Bendersky who explained that the problem can be associated with food, forage chain, reproductive or health issues.

“At the end of each day, a round will be held and a moderator will guide a debate on the topics covered with the aim that those present make contributions from the experience on the proposed technological solution and the alternatives”, said Bendersky and assured: “ That’s how we all get rich.”

According to Bendersky, “the Ita Ibotig case is proposed as part of the Livestock Tour because it is a family business that belongs to a GUIA group (Grupo Unidos INTA Advised) and is representative of family livestock systems in the central region of the province. of Corrientes”. And he added: “He has always been a technology seeker and maintained a link with INTA technicians that allowed him to validate a lot of information on the farm.”

Regarding the next stops of the Tour, Bendersky explained: “For the rest of the year we have planned 11 more days in very different geographical points, such as: Río Colorado (Río Negro), Bordenave (Buenos Aires), Colonia Benítez (Chaco ), Chacharramendi (La Pampa), Trevelin (Chubut) and Quimilí (Santiago del Estero)”. And he added: “As the spirit of this series of conferences indicates, we seek to provide technological solutions to common problems based on dialogue between the different actors.”

Reproductive biotechnology to improve efficiency in rodeos