HY-LINE CV-22 TECHNICAL RECOMMENDATIONS

Transcription

1 Product Update COMMERCIAL LAYER CV-22 HY-LINE CV-22 TECHNICAL RECOMMENDATIONS Key Management Points CALCIUM & PHOSPHORUS EGG SIZE CONTROL DIETS ACTUAL FEED CONSUMPTION GROWTH AND DEVELOPMENT GROWTH & DEVELOPMENT Focus on pullet rearing programs to optimize pullet growth and development. A pullet flock entering into egg production at correct body weight of g with uniformity higher than 90% performs best in lay For optimum development of digestive and immune systems, as well as maximum skeletal and muscle body reserves, it is important to achieve weekly target body weights during growing period Change growing diets only when recommended body weight is attained. Suggested ages are a guide if target weights are achieved If possible, exceed target body weights during growing period. This is especially important during the 0 12 week period. Excessive weight gain after 12 weeks will result in fat cell proliferation During rearing, calcium should be supplied as calcium carbonate powder or fine particles less than 2 mm in size. In Pre-Lay Diet, 50% of particles should be 2 4 mm LIGHTING PROGRAMS BEAK TRIMMING Target Weights Growing Period Age Body Weight Range (weeks) (g) * * Body weights in hot climates or floor grown birds may be 50 g lighter Feeding coarser meal or crumble may help increase feed intake in hot climates. Do not feed excessive levels of crude protein in hot weather Pre-Lay Diets help birds adjust to higher calcium rations and increase medullary bone. Timing for Pre-Lay ration may vary depending on body weight and uniformity Pre-Lay Diets should be fed at start of sexual maturity when most pullets show reddening of combs days before start of production Introduce Peaking Diet at onset of lay (1% egg production). As CV-22 is an early maturing layer, it is important to be prepared to feed Pre-Lay and Peaking rations at appropriate times

2 Product Update HY-LINE CV-22 TECHNICAL RECOMMENDATIONS Weekly Body Weight Gain GRAMS HIGHEST WEEKLY BODY WEIGHT GAIN WEEKS OF AGE Growing Period Nutrition Recommendations Starter 1 Starter 2 Grower Developer Pre-Lay Feed to a Body Weight of 180 g 450 g 1000 g 1150 g 1230 g Approximate Age 0 3 weeks 4 6 weeks 7 12 weeks weeks weeks Metabolizable Energy, kcal/kg Minimum Recommended Concentration Standardized Ileal Digestible Amino Acids Lysine % Methionine % Methionine+Cystine % Threonine % Tryptophan % Arginine % Isoleucine % Valine % Crude Protein % Calcium % Phosphorus (available) % Sodium % Chloride % LIGHTING PROGRAMS Use slow step-down lighting program to increase feed intakes and avoid early sexual maturity in underweight birds. If possible, use 3 consecutive weeks of constant light. Ideally, constant light should be less than 10 hours of light For flocks in open-sided houses coming into production in late winter and spring, it is acceptable to use naturally increasing daylight as only source of stimulation. Midnight feedings should be added if feed intake needs to be increased Light stimulation should begin when pullets weigh g (approximately 17 weeks of age). The period of slow increase of light stimulation should extend into peaking period Ideally the flock should not reach 16 hours of light until 30 weeks of age Decrease light intensity inside house to reduce impact of prolapse and cannibalism Ideal light intensity is lux during lay PAGE 2

3 Suggested Lighting Program for Light-Controlled Housing TIME OF DAY ½ Light stimulation at Ideal Body Weight ( kg) Transfer flock to laying house Gradual light increases up to peak of egg production ½ 14 14¼ 14½ 14¾ 15 15¼ 15½ 15¾ 16 HOURS OF LIGHT WEEKS OF AGE Midnight Feeding 16 hours Used whenever more feed intake is desired in both growing and laying flocks Midnight feeding increases calcium absorption during night when most of the egg shell is formed 3 hours 3 hours Midnight feeding is useful to boost feed intake depressed by heat stress or during peak egg production Midnight Feeding or Dark Midnight Feeding 1 hour Midnight feeding promotes greater feed consumption by providing extra feeding time during dark period The light provided during midnight feeding is in addition to regular day length (e.g. 16 hours) If midnight feeding is removed, it must be reduced gradually at rate of 15 minutes per week Midnight feeding will generally increase feed intake 2 5 g/day per bird Customizing Lighting Program for Open-Sided Housing When open-type houses allow natural daylight to affect flock, the lighting program must be planned in conjunction with changes in natural day length. No two places have same sunrise/sunset times year-round. Custom lighting programs for any location worldwide are available on Hy-Line International website www. hylineweblighting.com In example on the following page, the growing flock is maturing in spring with naturally increasing day length. To prevent early sexual development, the Hy-Line International Lighting program finds longest natural day length between 14 and 16 weeks of age and constructs an artifical lighting program that holds day length constant with artificial lights from 14 to 16 weeks. PAGE 3

4 Product Update HY-LINE CV-22 TECHNICAL RECOMMENDATIONS Enter address to start Enter variety/generation, location, housing style and hatch date Select language Click on Create Lighting Spreadsheet Results will appear Click on download Excel to access graphical forms, print and save results Same lighting program with sunrise and sunset represented by black lines and suggested artificial day length indicated by blue bars PAGE 4

5 Use of Shades in Open-Sided Houses To avoid cannibalism decrease light intensity inside house Avoid direct sunlight on birds with window shades, roof overhangs or trees Shades are an effective way to decrease light intensity inside house Keep shades free of dust to allow air flow. Use stir fans when using shades In dry, sandy areas lacking ground cover reflection of natural light into open houses can be significant. Locations having many cloudless days of full sunshine are also problematic. Window shades are highly recommended for these situations Black shades are preferred BEAK TRIMMING In light-controlled housing, one beak trimming is usually sufficient using an infrared treatment in hatchery or precision hot blade trimmer at 7 10 days If needed, a second corrective trim at 5 weeks or weeks of age should be used for birds with sharp regrowth of the beak In open-sided houses, a second trimming is highly recommended at 5 6 weeks or weeks. Timing of second beak trimming should consider intensity of vaccination program It is not ideal to schedule second beak trimming with a reactive inactivated vaccination such as Salmonella or other oilemulsion bacterins. Vaccine reactions may overstress flock and interrupt growth Beak Trimming 7 10 Days Should be trimmed at 2 3 mm from nares Beak Trimming Weeks Should be trimmed at 5 7 mm from nares Correct Beak Trimming Incorrect Beak Trimming PAGE 5

6 Product Update HY-LINE CV-22 TECHNICAL RECOMMENDATIONS FORMULATE LAYER DIETS TO ACTUAL CONSUMPTION Very important to design a nutrition profile according to ACTUAL feed consumption. Feed intake and performance parameters (egg production, body weight, egg size) can vary according to house temperature and other environmental factors. Carefully monitor feed intake and formulate feed to achieve suggested daily nutrient intake levels is best way to meet birds nutritional needs Standard commercial layer diets may not meet needs of feed efficient commercial varieties like the CV-22. Check feed specifications and compare against CV-22 nutritional requirements During transition period between 17 and 26 weeks of age, nutrient requirements increase dramatically. Feed consumption may be low relative to nutrient demand. A Pre-Peaking Ration formulated for low consumption (about g/day per hen) is useful as layers come into peak egg production In hot climates, more feed energy should be from oil rather than carbohydrates to lower heat produced during digestion and maintain feed intake. Other nutrients (amino acids, minerals) should be increased in hot weather to compensate for lower feed intake, but excess protein should be avoided Feed should have uniform coarse particle size profile (75 80% of feed particles between 1 3 mm and 20 25% below 1 mm) Do not exceed 20% fine feed particles (<0.5 mm) as too many fine feed particles decrease feed intake and nutrient absorption. Inclusion of liquid oil/fat (0.5% minimum) in the diet will help reduce separation of fine particles and dust Laying Period Nutrition Recommendations Recommended Concentration First Egg to Peak Production (17 32 Weeks) Post-peak to 90% Production (33 44 Weeks) 89% to 86% Production (45 58 Weeks) Less than 86% Production (+ 59 Weeks) Metabolizable Energy, kcal/kg Feed Consumption, g/day per bird Digestible Amino Acids Lysine % Methionine % Methionine+Cystine % Threonine % Tryptophan % Arginine % Isoleucine % Valine % Crude Protein % Calcium % Phosphorus (avail.) % Sodium % Chloride % Linoleic Acid % PAGE 6

7 Performance Table Age in Weeks Optimum % Hen-Day Production Average Mortality Cumulative* % Hen-Day Eggs Cumulative Optimum Average Hen-Housed Eggs Cumulative Optimum Average Body Weight kg Average Egg Weight** g/egg Feed Consumption g/day per bird Hen-Housed Egg Mass Cumulative kg Haugh Units Egg Quality % Solids *** * Mortality in open housing in tropical climates could be 0.15% to 0.20% weekly ** Egg weights after 40 weeks of age assume phase feeding of protein to limit egg size *** Percent solids in liquid egg mix of white and yolk Breaking Strength PAGE 7

8 CALCIUM AND PHOSPHORUS Ensure bird s daily requirement for calcium, phosphorus and minerals/vitamins is being supplied in daily ration If feed does not contain enough calcium to meet daily requirement, either change formulation or add calcium as top dressing. Additional calcium should be spread evenly on feed in form of large particles (2 4 mm) for afternoon feeding, 2 hours before dark period. Caution: birds allowed free access to limestone may over-consume calcium and reduce intake of balanced diet Calcium Particle Size Production Fine (0 2 mm) Coarse (2 4 mm) Pre-Lay 50% 50% 1st Egg to Peak 50% 50% Post-Peak to 90% 40% 60% 89% to 86% 35% 65% Less than 86% 35% 65% Appropriate particle size depends on solubility of limestone 0 2 mm 2 4 mm Example of fine and coarse particle calcium EGG SIZE CONTROL The CV-22 is a large egg variety with rapid increase in egg size when starting production Preventing early egg production in underweight birds is important to prevent prolapse Delay sexual maturity by using slow step-down lighting program Control egg size increases with phase feeding during laying period by reducing nutrient density (i.e. energy, protein, methionine, dietary oil and linoleic acid) over laying period Begin egg size control with diet changes when egg weight is +/- 1.0 g of standard REVIEW OF KEY POINTS FOR SUCCESS Obtain body weights with >90% body weight uniformity by end of growing period. Body weights at time of light stimulation should be g During brooding and growing, change diets based on body weight, not bird age. Flocks below body weight target or with poor uniformity should stay on starter diet until reaching 450 g Use slow step-down light program during growing period, with decreasing light hours until 14 weeks of age. Prevention of early sexual maturity is critical in preventing prolapse issues Provide two well-executed beak trimmings in grow to birds in open-sided houses. This is particularly important where birds are exposed to high intensity natural light in climates with many cloudless days. Do not allow layers to have long pointed beaks which will result in pecking and prolapse Use layer rations formulated for flock s actual feed intake. Check that commercial layer diets contain sufficient nutrient density to meet CV-22 s nutritional requirement relative to feed intake. Adequate calcium intake is critical to support the large egg size profile of the CV-22 Control egg size increase during production period with phase feeding by reducing nutrient density (i.e. protein, methionine, dietary oil, energy and linoleic acid) These guidelines are very important in order to achieve the best technical results for the Hy-Line CV-22. While every attempt has been made to ensure that the information presented is accurate and reliable at the time of publication, Hy-Line International cannot accept responsibility for any errors, omissions or inaccuracies in such information or management suggestions. Hy-Line International Hy-Line International January 2014