🌾 Animal Feed & Nutrition Management
Study maintenance and production rations for CUET Agriculture. DCP, TDN, concentrates, roughages and balanced ration formulation covered.
Basic Feed Terminology
Understanding these five key terms is the foundation of animal nutrition. Each term builds upon the previous one:
| Term | Definition |
|---|---|
| Feed (Bhojya Padarth) | Any dietary component given to animals |
| Ration | The total feed given to an animal in a 24-hour period — think of it as the animal's daily menu |
| Balanced Ration | A ration containing all required nutrients in the correct proportion — proteins, carbohydrates, fats, vitamins, minerals, and water in the right ratio for the animal's needs |
| Life Maintenance Ration | Basic ration needed to maintain an animal's health without any production — this is the minimum feed to keep the animal alive and healthy without producing milk, meat, or wool |
| Production Ration | Additional feed given above maintenance for production purposes (milk, wool, meat, eggs, reproduction) — the more you want the animal to produce, the more production ration it needs |
NOTE
Total Ration = Maintenance Ration + Production Ration. A common exam question asks you to distinguish between these concepts. An animal that is not producing (dry period) only needs maintenance ration.
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Basic Feed Terminology
Understanding these five key terms is the foundation of animal nutrition. Each term builds upon the previous one:
| Term | Definition |
|---|---|
| Feed (Bhojya Padarth) | Any dietary component given to animals |
| Ration | The total feed given to an animal in a 24-hour period — think of it as the animal's daily menu |
| Balanced Ration | A ration containing all required nutrients in the correct proportion — proteins, carbohydrates, fats, vitamins, minerals, and water in the right ratio for the animal's needs |
| Life Maintenance Ration | Basic ration needed to maintain an animal's health without any production — this is the minimum feed to keep the animal alive and healthy without producing milk, meat, or wool |
| Production Ration | Additional feed given above maintenance for production purposes (milk, wool, meat, eggs, reproduction) — the more you want the animal to produce, the more production ration it needs |
NOTE
Total Ration = Maintenance Ration + Production Ration. A common exam question asks you to distinguish between these concepts. An animal that is not producing (dry period) only needs maintenance ration.
Feed Requirements by Animal Type
Cattle & Buffalo
| Animal | Requirement |
|---|---|
| Cow/Bull | 2.5 kg feed per 100 kg body weight |
| Buffalo | 3 kg feed per 100 kg body weight |
| Cow (for milk) | 2.5 L milk production per 1 kg grain (for every 3 L milk) |
| Breeding bulls | 2 kg grain per day |
| Pregnant animals | 1-2 kg extra grain per day |
Notice that buffalo requires more feed (3 kg per 100 kg) than cow (2.5 kg per 100 kg). This is because buffaloes have a higher body maintenance requirement due to their larger frame and less efficient feed conversion compared to cattle.
Working Bulls — Extra Grain Requirement
| Work Intensity | Extra Grain (kg/day) |
|---|---|
| Light work | 1-1.5 kg |
| Medium work | 2-2.5 kg |
| Heavy work | 3-4 kg |
The extra grain compensates for the energy expended during physical labor. A bull doing heavy ploughing burns significantly more calories and needs proportionally more concentrate feed.
General Guidelines
- Feed ratio: Buffalo — 100:3, Cow — 100:2.5 (feed to body weight)
- Salt requirement: 30 gm per animal per day
- Fodder shortage period: October to April/June — this is when green fodder is scarce and preserved feeds (hay, silage) become essential.
- Feeding frequency: Every 10 hours (twice daily)
Feed Classification
All animal feed is divided into three categories based on fiber content and nutritive value:
| Chara / Roughage / Fodder | Dana / Concentrate | Feed Supplements |
|---|---|---|
| Crude fiber more than 18% | Crude fiber less than 18% | Vitamins, minerals, growth hormones, antibiotics |
| TDN (Total Digestible Nutrients) less than 60% | TDN = 60% or more | Given as 1/3 of total feed |
| Constitutes 2/3 of total feed | Constitutes remaining portion | — |
IMPORTANT
The 18% crude fiber threshold is the dividing line between roughage and concentrate. This is a very commonly tested fact. Also remember: roughage = 2/3 of diet, supplements = 1/3 of diet.
Fodder Management
Silage (Stored Green Fodder)
Silage is green crop material that is cut and stored under airtight conditions to preserve it through anaerobic fermentation. The process is similar to making pickles — the acidic environment created by fermentation prevents spoilage. Silage is the best way to preserve the nutritive value of green fodder for use during the shortage period.
Key Properties:
- Moisture content: 60%
- Dry matter: 30-50%
- pH: 3.5-4.2 (ideal) — the acidity preserves the silage
- Preparation time: 12 weeks (3 months)
Silage Quality by pH:
| pH Range | Quality |
|---|---|
| 3.5-4.2 | Very Good |
| 4.2-4.5 | Good |
| 4.5-4.8 | Average |
| Above 4.8 | Bad |
The lower the pH (more acidic), the better the silage quality. Lactic acid bacteria are the primary fermenters that create the acidic conditions needed for preservation.
Silage Types by Taste:
| Type | Characteristic |
|---|---|
| Badami | Sweet |
| Amli | Slightly acidic |
| Hari | Green/fresh |
| Adhik Khatti | Highly acidic |
| Fafumdiyukt | Moldy/musty |
Silage Storage Structures:
| Structure Type | Dimensions |
|---|---|
| Pit / Gadha | 8 x 5 x 4 ft |
| Burj (Tower) | 8-10 ft diameter, 20-22 ft height |
| Naliya (Trench) | 8 ft width, 7-8 ft depth |
Hay (Sun-Dried Fodder)
Hay is crop material that is cut before flowering and sun-dried for preservation. The timing of cutting is critical — cutting before flowering ensures the maximum nutrient content is retained. After flowering, the plant redirects nutrients to seed formation, reducing the quality of the hay.
Key Properties:
- Moisture content: 14-15%
- Dry matter: 85-90%
- Preparation time: 3-6 weeks (1-1.5 months)
Types of Hay:
| Type | Examples | Special Properties |
|---|---|---|
| Legume Hay | Matar, Lobia, Barseem, Rijka | Rich in Vitamin A, D, C, E and Calcium — the most nutritious type of hay |
| Grass/Fruit-less Hay | Dub, Napier, Sudan, Jowar | Common fodder grasses |
| Mixed Hay | Combination of legume and grass | Balanced nutrition |
| Grain Hay | Jo (Barley), Bajra, Gehu (Wheat) | Made from cereal crops |
TIP
Oat (Jai) can be used to make both silage and hay. This dual-use capability makes oat an extremely versatile fodder crop. Oat is a grass crop commonly used as green fodder.
Dry Fodder Types
Loom / Lun
- Leaves from Khejdi tree (a dry fodder) — Khejdi (Prosopis cineraria) is Rajasthan's state tree and a lifeline for desert livestock.
- DCP (Digestible Crude Protein): 8-9%
- TDN (Total Digestible Nutrients): 48-50%
Pala
- Dry leaves of bushes and shrubs
- DCP: 8-10%
- TDN: 36-40%
IMPORTANT
Loom and Pala are protein-rich fodder sources, also called "Famine Fodder" as they are available during droughts and feed scarcity. In Rajasthan's arid regions, these tree-based fodders are often the only feed available during severe droughts.
Oil Cakes as Animal Feed
Oil cakes (khali) are the residue left after extracting oil from oilseeds. They are protein-rich and form an important part of concentrate feed. However, not all oil cakes are safe for animal consumption.
Edible Oil Cakes (Safe for feeding)
| Oil Cake | Nitrogen (N2) Content |
|---|---|
| Kapas (Cotton) | — |
| Kusum (Safflower) | 7.9% |
| Til (Sesame) | 6.2% |
| Sarso (Mustard) | 5.2% |
| Mungfali (Groundnut) | 7.2% |
Inedible Oil Cakes (Not for direct feeding)
| Oil Cake | Use |
|---|---|
| Alsi (Linseed) | Manure/Industrial |
| Arandi (Castor) | Manure/Industrial — castor cake contains ricin, a toxic substance |
| Neem | Manure/Pest repellent |
| Mahua | Manure/Industrial |
WARNING
Never confuse edible and inedible oil cakes in exams. Inedible cakes contain toxic compounds (ricin in castor, saponins in mahua) that can be fatal to livestock if fed directly.
Feed Toxins — Important for Exam
These three toxin-source pairs are very frequently tested:
| Toxin | Source | Effect |
|---|---|---|
| Gossypol | Binola (Cotton seed) oil | Reduces iron absorption — causes anemia and reproductive problems |
| Aflatoxin | Mungfali (Groundnut) — fungal contamination | Liver damage — produced by Aspergillus flavus fungus, one of the most dangerous feed contaminants |
| Cyanogenetic Glucoside | Jowar (Sorghum) | Cyanide poisoning — young sorghum plants and stunted/drought-stressed plants are particularly dangerous |
How does Aflatoxin contamination occur?
**Aflatoxin** is produced by the fungus *Aspergillus flavus* that grows on **groundnut (mungfali)** and other oilseeds when stored in warm, humid conditions. The toxin causes severe **liver damage (hepatotoxicity)** and is also carcinogenic. In India, groundnut-based oil cakes must be tested for aflatoxin levels before being used as animal feed. The maximum permissible limit is typically 20 parts per billion (ppb).Dry vs Green Fodder Comparison
| Parameter | Dry Fodder | Green Fodder |
|---|---|---|
| Moisture | 10-15% | 60-80% |
| Dry Matter | 85-90% | 20-40% |
| Palatability | Lower | Higher |
| Vitamins | Lower (except D) | Rich in A, C, E |
| Digestibility | Lower | Higher |
| Availability | Year-round (stored) | Seasonal |
The key advantage of dry fodder is year-round availability since it can be stored. Green fodder is superior in nutrition, palatability, and digestibility but is available only seasonally. A good feeding program combines both types.
Protein & Carbohydrate Sources
Protein-Rich Feed Sources
| Source | Type |
|---|---|
| Oil cakes (Sarso, Til, Mungfali) | Plant protein |
| Legume hay (Barseem, Rijka) | Plant protein |
| Fish meal | Animal protein |
| Meat meal | Animal protein |
| Blood meal | Animal protein |
Carbohydrate/Energy-Rich Feed Sources
| Source | Type |
|---|---|
| Cereal grains (Maize, Barley, Wheat) | Concentrate |
| Molasses (Sheera) | By-product |
| Rice bran | By-product |
| Wheat bran (Chokar) | By-product |
| Jowar, Bajra | Cereal grains |
Manure Values
| Source | N2 (%) | Phosphorus (%) | Potassium (%) |
|---|---|---|---|
| Gobar ki Khad (Cow dung manure) | 0.5 | 0.25 | 0.5 |
NOTE
Grains contain approximately 90% dry matter, making them highly concentrated feed sources. This is why concentrates are more energy-dense per kg compared to roughages.
Key Points for Exam
- Balanced ration = all nutrients in correct proportion
- Buffalo needs 3 kg per 100 kg body weight (more than cow)
- Silage pH should be 3.5-4.2 for best quality
- Hay moisture is 14-15%, silage moisture is 60%
- Silage takes 3 months, hay takes 1-1.5 months to prepare
- Gossypol toxin comes from Binola (cotton seed)
- Loom and Pala are called famine fodder
- Oat can make both silage and hay
- Feed animals every 10 hours (twice daily)
- Salt requirement: 30 gm per animal per day
Summary Cheat Sheet
| Concept / Topic | Key Details / Explanation |
|---|---|
| Ration | Total feed given in 24 hours |
| Balanced Ration | All nutrients in correct proportion |
| Life Maintenance Ration | Basic feed to keep animal alive without production |
| Production Ration | Additional feed above maintenance for milk/meat/wool/eggs |
| Cow feed requirement | 2.5 kg per 100 kg body weight |
| Buffalo feed requirement | 3 kg per 100 kg body weight (more than cow) |
| Salt requirement | 30 gm per animal per day |
| Feeding frequency | Every 10 hours (twice daily) |
| Fodder shortage period | October to April/June |
| Roughage (Chara) | Crude fiber >18%; TDN <60%; constitutes 2/3 of total feed |
| Concentrate (Dana) | Crude fiber <18%; TDN ≥60% |
| Feed supplements | Vitamins, minerals; given as 1/3 of total feed |
| Silage | Green fodder stored airtight; Moisture: 60%; pH: 3.5–4.2 (best); Prep time: 3 months (12 weeks) |
| Silage pH quality | 3.5–4.2 = Very Good; 4.2–4.5 = Good; 4.5–4.8 = Average; >4.8 = Bad |
| Hay | Cut before flowering; Sun-dried; Moisture: 14–15%; Prep time: 1–1.5 months |
| Legume hay | Rich in Vitamin A, D, C, E and Calcium (most nutritious hay) |
| Oat (Jai) | Can make both silage and hay |
| Loom and Pala | Tree-based dry fodder; Called "Famine Fodder"; Protein-rich |
| Loom (Khejdi leaves) | DCP: 8–9%; TDN: 48–50% |
| Edible oil cakes | Kapas, Kusum (7.9% N₂), Til (6.2%), Sarso (5.2%), Mungfali (7.2%) |
| Inedible oil cakes | Alsi, Arandi (contains ricin), Neem, Mahua |
| Gossypol toxin | From Binola (cotton seed); Reduces iron absorption |
| Aflatoxin | From Mungfali (groundnut); Aspergillus flavus; Liver damage |
| Cyanogenetic Glucoside | From Jowar (Sorghum); Releases cyanide (HCN) |
| Dry fodder moisture | 10–15% |
| Green fodder moisture | 60–80% |
| Cow dung manure (Gobar) | N₂: 0.5%; P: 0.25%; K: 0.5% |
| Working bull extra grain | Light: 1–1.5 kg; Medium: 2–2.5 kg; Heavy: 3–4 kg |
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