Are you still curious, is lucerne good for cows? Among the many choices of feed, lucerne is one of the most recommended legume forages, because of its high nutritional content which is good for optimizing productivity on farms. But what about the risk of bloating which threatens the health of cows?
The negative effects of overfeeding lucerne are real and can be serious, even fatal in acute cases. Not surprisingly, until now there are still questions about whether lucerne is good or bad for cows. In this article, let’s discuss the advantages and disadvantages of lucerne so that you can make a well-informed decision about whether to include lucerne in your herd’s feeding program.
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Nutritional Content in Lucerne
To answer the question “Is lucerne good for cows?” let’s start by discussing its nutritional content. When breeders want optimal production results, both for meat and cow’s milk, lucerne can genuinely support this goal given its exceptional nutritional profile.
Lucerne (Medicago sativa), from the Fabaceae family, has a high protein content that supports the growth and maintenance of muscle tissue in livestock. It can be fed to both calves and adult cows. The digestibility of lucerne is also notably high compared to most other forages, which means more of what the animal eats is actually absorbed and used, saving money on overall feed costs.
Beyond protein, lucerne provides minerals and vitamins that support body weight gain and general health. Calcium, phosphorus, and vitamins A and D are all present in meaningful quantities, making lucerne an efficient way to meet several micronutrient needs at once. This applies whether lucerne is grazed fresh, fed as hay, or processed into silage.
Lucerne Nutritional Profile at a Glance
| Nutrient | Approximate Content (Dry Matter Basis) | Benefit for Cows |
|---|---|---|
| Crude Protein | 18 to 22% | Supports muscle development, milk production, immune function |
| Crude Fiber | 20 to 30% | Supports rumen health and steady digestion |
| Metabolizable Energy | 1.5 to 2.5 Mcal/kg DM | Fuels growth, reproduction, and daily activity |
| Calcium | 1.2 to 1.8% | Essential for bone strength and milk yield |
| Phosphorus | 0.2 to 0.3% | Supports energy metabolism and reproduction |
| Vitamin A (Beta-carotene) | High | Supports vision, reproduction, and immune defence |
| Vitamin D | Present | Supports calcium absorption and bone health |
Lucerne Advantages for Cows
Lucerne is good for cattle and other livestock when consumed in appropriate quantities. The following are the main advantages of lucerne in supporting increased farm productivity.
High Nutrition Feed
Lucerne is rich in vitamins and minerals that livestock need to increase their fat and muscle mass. Consuming lucerne in the right quantities meets the needs of vitamins A and D for livestock. The fiber content in lucerne also falls in the range of 20 to 30 percent, which supports a healthy digestive system and keeps animals satiated for longer between feeding intervals.
Supports Livestock Energy and Vitality
Consuming lucerne in sufficient quantities also meets the energy needs of livestock. The metabolizable energy content of lucerne is approximately 1.5 to 2.5 Mcal/kg dry matter, which is substantially higher than many common grass forages. Lucerne is suitable for all categories of dairy cows from calves to adults. It also supports energy requirements for transport cattle and helps livestock maintain body temperature and condition during cold seasons.
Quality Silage Raw Material
Lucerne is excellent for making silage given its high nutrient content. While cows can graze lucerne directly and the plant can grow almost year-round in suitable climates, making silage from lucerne allows better consumption control and creates a reliable feed supply during dry spells or periods of low pasture growth. Lucerne silage can be stored for 12 to 18 months when wrapped in quality LLDPE silage film, making it one of the most practical ways to carry high-protein feed through difficult seasons.
Disadvantages of Lucerne for Cattle and Livestock
The benefits of lucerne are real and well-supported, but ignoring the disadvantages would be a mistake. The good news is that most risks associated with lucerne are manageable with the right feeding practices. Here is what to watch out for.
Risk of Bloat When Overfed
Introducing hungry cows directly to a lush lucerne pasture is one of the most common causes of frothy bloat in cattle. When cows eat large amounts of fresh lucerne rapidly, the soluble proteins and saponins in the plant can create a stable foam in the rumen that traps gas and prevents normal belching. In severe cases, this can be fatal if not treated quickly.
The risk is highest when cows are very hungry, when lucerne is wet from rain or dew, and when cows are not accustomed to lucerne in their diet. The practical solution is straightforward: always feed cows some dry roughage such as hay or straw before moving them to a lucerne pasture, introduce lucerne gradually, and avoid grazing immediately after heavy dew or rain.
Caution Required for Pregnant Cows
Lucerne can be included in the ration of pregnant cows in moderate amounts without major issues. However, feeding should be managed carefully. The main concerns are overfeeding, which can accelerate lactation onset before calving, and feeding lucerne that is contaminated with mold or dust, which can pose risks to both the cow and the developing calf. Feed for pregnant cows should always be clean, free of mold, and fed in controlled quantities alongside other balanced ration components.
Requires Managed Feeding Practices
Whether grazing cows on a lucerne pasture or feeding lucerne-based silage, consistent management is required. You need to control how much lucerne the cows consume at each feeding and ensure other feed components are included so that the overall ration remains balanced. The high calcium content of lucerne, for example, can create calcium-to-phosphorus imbalances if fed as the sole forage for extended periods. Combining lucerne with grass hay or cereal silage helps balance the ration naturally.
Lucerne Feeding Comparison by Cow Type
| Cow Type | Suitability | Recommended Approach |
|---|---|---|
| Dairy cows (lactating) | Excellent | Include as major forage component; monitor for bloat when grazing fresh |
| Beef cattle (finishing) | Very good | Use as protein supplement alongside energy-dense cereal silage |
| Calves | Good | Introduce gradually; high digestibility suits growing animals well |
| Pregnant cows | Moderate — with care | Feed in controlled amounts; ensure no mold or dust contamination |
| Dry cows | Use with caution | Limit quantity to avoid excess calcium intake; balance with grass hay |
| Transport cattle | Good | Lucerne silage is practical for on-road feeding; supports energy maintenance |
Frequently Asked Questions about Lucerne for Cows
Q: Is lucerne good for dairy cows specifically?
Yes, lucerne is one of the most beneficial forages available for dairy cows. Its high crude protein content of 18 to 22% directly supports milk production, as protein is the primary nutritional driver of milk synthesis. The calcium content in lucerne also helps meet the elevated calcium demands of lactating cows. Multiple studies have shown that dairy cows fed lucerne-based rations consistently produce more milk compared to those fed solely on grass hay. The key is to manage fresh grazing carefully to prevent bloat, or to feed lucerne as quality silage which eliminates most of the bloat risk associated with fresh consumption.
Q: What causes bloat in cows from eating lucerne and how can it be prevented?
Bloat from lucerne is primarily caused by frothy bloat, a condition where soluble plant proteins and saponins in fresh lucerne create a stable foam in the rumen that traps fermentation gases. Unlike free gas bloat where gas accumulates but can eventually be expelled, frothy bloat prevents normal belching and can escalate rapidly. Prevention involves ensuring cows consume some dry roughage such as hay or straw before entering a lucerne pasture, introducing lucerne gradually over several days, avoiding grazing on wet or frost-affected lucerne, and not turning hungry cows directly onto a lush lucerne stand. Feeding lucerne as silage rather than fresh is also an effective way to greatly reduce this risk.
Q: Can pregnant cows eat lucerne?
Pregnant cows can eat lucerne in moderate, controlled amounts. The main precautions are to avoid overfeeding, to ensure the lucerne is free of mold and dust contamination, and to balance the ration with other feed components. Concerns about lucerne causing premature lactation or early labor are more commonly associated with red clover and other phytoestrogen-rich legumes than with lucerne specifically. Lucerne contains relatively low levels of phytoestrogens compared to clover. However, as with any high-quality feed in pregnancy, moderation and ration balance are always recommended. Consult with a livestock nutritionist if managing high-value pregnant cows.
Q: How much lucerne should I feed my cows per day?
There is no single universal quantity because the right amount depends on the cow’s size, production stage, and the rest of the ration. As a general guideline for dairy cows, lucerne can make up between 30 and 50% of the total forage dry matter intake when fed as silage or hay alongside a complementary energy source. For beef cattle in a finishing program, lucerne is often included as a protein supplement at a lower proportion alongside high-energy cereal silage. The key principle is that lucerne should complement a balanced ration, not dominate it entirely, to avoid mineral imbalances from its very high calcium content.
Q: Is lucerne silage better than fresh lucerne for cows?
Lucerne silage offers several practical advantages over fresh lucerne for cow feeding. First, the bloat risk is significantly reduced because the fermentation process breaks down the soluble proteins and saponins responsible for frothy bloat. Second, silage allows you to store peak-quality lucerne harvested at the optimal growth stage and feed it throughout the year, including during dry seasons when fresh lucerne is not available. Third, silage intake can be more easily controlled and measured compared to pasture grazing. The nutritional value of well-made lucerne silage is very close to that of fresh lucerne, provided the fermentation process was completed successfully with good airtight wrapping.
Q: Can lucerne be fed to cattle together with other forages?
Yes, and in many cases this is the best approach. Combining lucerne with grass hay or cereal silage produces a more balanced total ration. Grass hay adds fiber and helps counterbalance the high calcium content of lucerne. Cereal silage such as maize or sorghum contributes starch energy that lucerne lacks as a legume. This complementary combination is widely used in high-producing dairy operations where the goal is to meet both the protein and energy demands of lactating cows efficiently. Mixing feed types also reduces the per-head bloat risk compared to feeding fresh lucerne as the sole forage source.
This article was last reviewed and updated by the Silopak Editorial Team on May 18, 2026. Our team periodically revisits published content to ensure accuracy, relevance, and alignment with current best practices in livestock feed management and silage preservation.
