Effects of dietary n-3 polyunsaturated fatty acids and ... - FINS

More documents

Recommendations

Info

1 st WorkshopXIII International Feed Technology SymposiumThe content of butyric acid could be reduced by wilting the cut mass of sudan grassto 35% dry matter content, which would improve competitiveness of lactic acidbacteria and increase production of lactic at the expense of butyric acid. This wouldconsiderably improve consumption by cattle.Having in mind indicators of silage quality presented in Table 2, it would beimportant to review realized yields per hectare for individual fractions with variousdigestibility for both cultures. The light digestible fraction would contain rawprotein, raw fat, and nonstructural carbohydrate. The middle digestible fractionwould contain hemicellulose, while the hardly digestible fraction would include ADFfibers.Table 3. Yield of individual fractions with different digestibilityFraction / SpeciesLight digestiblefractionMiddle digestiblefractionHardly digestiblefractionYield of maize silage32,4 t/haYield ofCumulative,fraction,t/hat/haYield of sudan grass silage66,7 t/haYield offraction, t/haCumulative,t/ha6,77 6,77 4,64 4,642,13 8,9 5,64 10,282,59 11,49 8,71 18,99A careful analysis of results in Table 3, shows that for maize there is a higher yieldonly for the light digestible fraction, which is by all means the most important, andthat this yield is almost 50% higher than for sudan grass. However, the cumulativeyield of the light and the middle digestible fraction, that can still be fairly wellutilized by cattle, was considerably higher for sudan grass than for maize. Thisdifference in yield is especially in favor of sudan grass if the calculation includes allthree fractions. Although the hardly digestible fraction is a hardly accessible sourceof energy and body building substances, still a considerable part of this fraction(cellulose) is also utilized by cattle, owing to the presence of symbiotic cellulyticbacteria in their pregasters (1).When analyzing results from Table 3, one should keep in mind that these resultspertain to 2004, which had high above average precipitation. There is cause topresume that the relative yield increase of light and middle digestible fractions ofsudan grass compared to maize was even more pronounced in unfavorable years suchas 2003 (draught).Owing to its ability to regenerate, sudan grass can be used freshly cut as greenfodder, and in such use it offers three cuts a year without any problem (5). Used thus(at earlier phases of development) its digestibility is much higher, and cattle readilyconsumes it in large quantities in this form, therefore it often happens that duringperiods of feeding freshly cut sudan grass, the average milk yield on the farm growsby as much as two liters per animal, with a certain decrease of dry matter in milk.257
1 st WorkshopXIII International Feed Technology SymposiumNaturally, this type of nutrition requires more human labor (daily cutting and drivingthe cut mass to the site), and implementation depends on climate conditions to a highdegree.CONCLUSIONThe above permits the conclusion that reasons for partial substitution of maize andintroduction of sudan grass in the so-called "farm" plant sequence are:- Heightened risk of growing maize as a monoculture- Better resistance of sudan grass than maize to draught, diseases, weeds, andpests- Sudan grass had higher yields of dry matter per surface unit- The possibility to use sudan grass for feeding cows as hay and green massREFERENCES1. Grubić G., Adamović M.: Ishrana visokoproizvodnih krava. Beograd,1998, p 218.2. Đukić D., Pataki I., Mirkov: Prinos, kvalitet i hranljiva vrednost krmnihsirkova i sudanske trave, Zbornik referata sa 29. seminara agronoma;Naučni institut za ratarstvo i povrtarstvo, Novi Sad, 1995, 517-5283. Petkova, M., Zhelev, K.: Productive effect of sorghum sudan grass silagein lactating dairy cows, XII International Feed Tehnology Symposium,Novi Sad, Serbia (2007), 223-229:4. Sekulić R., Kereši Tatjana, Štrbac P.: Stanje kukuruzne zlatice(Diabrotica V.virgifera Le Conte) posle devet godina u Jugoslaviji; Zbornikreferata sa 35. seminara agronoma; Naučni institut za ratarstvo i povrtarstvo,Novi Sad, (2001) str. 173-1805. Vučković S.M.: Krmno bilje, Institut za istraživanja u poljoprivrediSRBIJA, Beograd, 1999.258
Page 2 and 3:
1 st WorkshopXIII International Fee
Page 4 and 5:
Page 6 and 7:
Page 8 and 9:
Page 10 and 11:
Page 12 and 13:
Page 14 and 15:
Page 16 and 17:
Page 18 and 19:
Page 20 and 21:
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29:
Digestibility (%)1 st WorkshopXIII
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Starch disappearance (%)1 st Worksh
Page 72 and 73:
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 83 and 84:
Page 85 and 86:
Page 87:
Page 90 and 91:
Page 92 and 93:
Page 94:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
X Axis Title1 st WorkshopXIII Inter
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
dehulledhulledFusarium spp.Alternar
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131:
Page 134 and 135:
Page 136 and 137:
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Ash content, %1 st WorkshopXIII Int
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204:
Page 207 and 208: 1 st WorkshopXIII International Fee
Page 209 and 210: conversion of food (kg)1 st Worksho
Page 240: 1 st WorkshopXIII International Fee
Page 257: 1 st WorkshopXIII International Fee
Page 265 and 266: production of fat correctedmilk 3,5
Page 309 and 310:
Page 311 and 312:
Page 313 and 314:
Page 315 and 316:
Page 317 and 318:
Page 319 and 320:
Page 321 and 322:
Page 323 and 324:
kg feed/kg body weignt1 st Workshop
Page 325 and 326:
Page 327 and 328:
Page 329 and 330:
Page 331 and 332:
Page 333 and 334:
Page 335 and 336:
Page 337 and 338:
Page 339 and 340:
Page 341 and 342:
Page 343 and 344:
Page 345:
show all

Effects of dietary n-3 polyunsaturated fatty acids and ... - FINS

Create successful ePaper yourself

Delete template?

Save as template?