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21 Cards in this Set
- Front
- Back
photosynthesis
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photosynthesis:
6CO2 + 6H2O + 673kcal --> glc + 6H2O |
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respiration
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respiration:
glc + 6O2--> 6CO2 + 6H2O + 36 ATP |
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true stomach end products
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true stomach end products:
1. met E : Kcal from carbs 2. aa's 3. fa's and glycerol |
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classes of animal feeds
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classes of animal feeds:
1. roughages 2. concentrates 3. succulents |
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roughages
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roughages:
- bulky, high CF >18% - primary feed for herbivores 1. pasture 2. hay 3. straw |
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stage of maturity of roughage
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stage of maturity of roughage:
- digestibility of DM dec as plant matures, esp grasses: 1. inc cell wall contents: cellulose, lignin 2. dec cell contents: CP - best at flowering stage |
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soil fertility and roughage
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soil fertility and roughage:
- determines productivity and quality of pastures - rangelands: leaching, shallow alkaline soils= low fertility - grass/legume pasture: legumes fix N in soil which grass then take advantage of |
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grasses
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grasses:
- Gramminae: 6,000 spp - high quality starch and cellulose - low CP 1. buffel 2. guinea 3. rhodes 4. elephant |
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legumes
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legumes:
- Leguminosae: >14,000 spp - good quality protein - minerals: Ca, Mg, S 1. alfalfa 2. lupines 3. vetches |
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forage conservation
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forage conservation:
1. silage: anaerobic fermentation 2. hay: moisture low, dry geen materialsc |
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concentrates
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concentrates:
- supplies macronutrients at high conc - contains (low) CF <18%, low moisture - high in N-free extracts (NFE) and total digestible nutrients (TDN) |
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protein-rich concentrates
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protein-rich concentrates:
1. plant 2. animal 3. non-protein N feedstuffs 4. single cell proteins |
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plant protein concentrates
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plant protein concentrate:
- byproducts of oil production 1. soybean meal 2. cottonseed cake 3. sunflower cake 4. ground nut cake 5. coconut or copra cake 6. peas meal |
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soybean meal
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soybean meal:
- whole soybeans: 15-21% oil - 35% CP, 18% fat, 5% CF - sub-optimal: cys and met - poor B vit - swine ration: 250 kg/ ton |
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soybean meal toxins
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soybean meal toxins:
- stimulatory and inhibitory substances: allegenics, goitrogenic and anti-coagulant factors - trypsin inhibitors: raw or non-heated treated, growth retardant, no threat to R - trypsin inhibitor inactivation: 100C for 3 min |
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cottonseed cake
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cottonseed cake:
- good quality P but low cys, met, lys - Ca:P high 1:6, deficiency - good thiamine, poor carotene - gossypol: 0.03-2g/ kg DM - swine ration: 5-10% |
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gossypol toxicity
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gossypol toxicity:
- cottonseed yellow pigment, antioxidant - toxic to young monogastrics, fine in R - pigs, poultry ration < 100g free gossypol/ kg 1. anorexia 2. weight loss 3. dyspnea 4. cardia irregularity |
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sunflower cake
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sunflower cake:
- CF 42% - met 2x soybean, lys low 1. cattle: 250 kg/ ton 2. sheep: 150 kg/ ton 3. growing pigs: 250kg/ ton 4. finishing pigs: 50kg/ton 5. sows: 100kg/ ton |
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ground nut cake
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ground nut cake:
- CP 250-300g/kg DM - fat 350-600g/kg DM - low cys, met, vit B12 and Ca - ration <= 25% diet - anti-trypsin |
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coconut/ copra cake
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coconut/ copra cake:
- oil 25-65 g/kg DM - rancidifies easily - low lys, his - CF 120g/kg DM: not for NR - swine ration <= 25kg/ton - supplement with animal protein for aa balance |
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peas meal
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peas meal:
- similar to bean meal - CP low 250g/kg DM - CF < 60g/kg DM - high lys, cys, met - E 13.4MJ/ kg DM - R ration <= 400kg/ ton feed |