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高粗料日粮中添加脂肪对奶年血液代谢产物瘤胃发酵和干物质消化率影响的研究 总被引：2，自引：0，他引：2
对50头泌乳中期的奶牛进行为期6周的饲养试验，研究高粗料高脂肪日粮对奶牛血液代谢产物、瘤胃发酵和干物质消化率的影响。试验设有10个重复，每个重复5头奶牛，每头奶牛给定一种日粮。试验用日粮为：对照日粮（日粮1）和试验日粮（高粗料75％高脂肪7．5％，日粮2；高粗料，中等水平脂肪5．0％，日粮3；中等水平粗料65％，高水平脂肪，日粮4；中等水平粗料和脂肪，日粮5；或者对照日粮中含有50％粗料和2．0％脂肪）。这些日粮含氮量相同（CP17．7％）。粗饲料由20苜蓿干草、40％苜蓿半干青贮和40％青贮玉米组成。所用脂肪由80％瘤胃 保护脂肪和20％黄色油脂组成。试验结果表明：试验组和对照组的血糖浓度差异不显著；试验组的血浆非酯化脂肪酸（NEFA）高于对照组。而奶牛采食日粮的粗饲料和脂肪水平不同，其NEFA差异不显著；对照组、试验组与粗饲料和脂肪水平不同的日粮的瘤胃PH、瘤胃VFA浓度和干物质消化率差异不显著。 相似文献
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A. F. M. Ekramul Haque A. Hamid M. T. Islam M. Mohiuddin 《Journal of Agronomy and Crop Science》1992,168(1):61-64
Effects of seedbed condition and seeding depth on the emergence and seedling vigour of upland rice was studied. Regardless of aggregate size distribution, seeds sown at 2 cm depth gave the maximum emergence rate (80-90 %) which was reduced to 47 % for sowing at 5 cm depth. Seeding at 10 cm depth caused total failure in emergence. When planted at 2 cm depth, aggregate size produced considerable variation in the speed of emergence but caused no significant differences in final emergence count. For seeds sown at 5 cm depth, seedbed with aggregate size < 2 mm resulted in poor emergence (12 %) while with aggregates > 8 mm reduced emergence by 34 % compared with balanced proportion of larger, moderate and smaller aggregates. Neither the seedbed condition nor seeding depth caused significant variation in seedling height or seedling dry weight. 相似文献
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Muhammad Farrukh Saleem Muhammad Faisal Bilal Shakeel Ahmad Anjum Muhammad Aown Sammar Raza Mudassar Maqbool Azhar Ghaffari 《Communications in Soil Science and Plant Analysis》2016,47(2):156-166
Removal of early fruiting branches with greater potassium doses caused more source and no sink at early stages of growth, leading to improved yield, yield components, and fiber quality traits in Bt cotton. The study used manual alteration of plant architecture (F1, no branch removal; F2, removal of first fruiting branch; F3, removal of first and second fruiting branches; F4, removal of all squares from first fruiting branch; F5, removal of all squares from first and second fruiting branches) and potassium rates (50, 100, and 150 kg ha?1) in a randomized complete block design and was repeated for 2 years (2011 and 2012). Increasing potassium application increased total bolls per plant and cotton yield to the greatest levels in F3 and F5, against lowest level in the control. Ginning out turn, fiber length, seed oil, and seed protein content were influenced by fruiting branch or square removal but the difference was less. Increasing potassium improved seed and fiber quality. 相似文献
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Fuyu Shi Hucheng Wang Abraham Allan Degen Jianwei Zhou Na Guo Shah Mudassar Ruijun Long 《Journal of animal physiology and animal nutrition》2019,103(4):969-976
Yaks and indigenous Qaidam cattle and cattle‐yak crosses (C × Y) graze on the Qinghai‐Tibetan Plateau (QTP) throughout the year, but yaks are raised at higher elevations than cattle. Yaks do not receive supplementary feed whereas cattle require supplementary feed during harsh winter. We hypothesized that yaks would cope with the severe conditions of the QTP better than cattle and utilize the pasture more efficiently. We also hypothesized that differences between species would be pronounced in winter, when conditions are particularly harsh. To test these hypotheses, seasonal rumen fluid parameters of yaks, C × Y and cattle (n = 3 for each) were examined. Rumen fluid was collected in summer and winter from each genotype 2, 5 and 12 hr after a day of grazing. Concentrations of total volatile fatty acid (VFA), acetate, propionate, isobutyrate and isovalerate were greater in yaks than in cattle in summer (p < 0.05), while propionate concentration was lower in yaks than in cattle in winter (p < 0.05). Concentrations of ammonia and urea were greater (p < 0.001) in yaks than in cattle (p < 0.001) in summer, whereas, concentrations of free amino acids (AA) were greater in cattle than in yaks in summer and winter (p < 0.001). Concentrations of total VFA, acetate, propionate and butyrate decreased linearly (p < 0.05), whereas concentrations of isobutyrate and isovalerate increased linearly for yak and C × Y with sampling time (p < 0.05) in summer. In summer, concentrations of isobutyrate and isovalerate were greater in yaks than in cattle (p < 0.05). In conclusion, rumen fermentation characteristics of yaks showed that they coped better than cattle or C × Y in the harsh climate as we hypothesized. However, in contrast to our hypothesis, this emerged only in summer, when pasture was plentiful and not in winter, when pasture was scarce. 相似文献
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处理霉菌毒素污染的饲料 总被引：1，自引：0，他引：1
S.M.Mohiuddin 《饲料广角》2001,(4):23-24
最近几年,关于霉菌毒素产生、作用机制和它们对畜禽生产影响的资料积累了很多。眼前需要的是懂得如何在畜禽日粮中利用霉菌毒素污染的饲料。-作者S.M.Mohiuddin博士。 自从1960年英国火鸡X病爆发,世界开始注重对毒素中毒的彻底调查。已知有300多种真菌产生毒素,但除几种毒素外,我们对它们产生 相似文献
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Tarit Kumar BAUL Mohammad MEZBAHUDDIN Mohammad Mosharraf HOSSAIN Mohammed MOHIUDDIN 《中国林学(英文版)》2010,12(4):228-235
The present study investigated the rooting ability and growth performance of juvenile single-node leafy stem cuttings of 相似文献
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Mehtab Ahmad Jalees Ahmed Bhatti Muhammad Abdullah Khalid Javed Mehboob Ali Ghazanfar Rashid Rafi Uddin Ali Hassan Badini Mudassar Jehan 《Tropical animal health and production》2018,50(6):1249-1254
During summer season, increase in the environmental temperature in the subtropical regions of Pakistan is negatively affecting the performance of dairy animals. The study objective was to determine the effect of ambient management (90 days) on productive and physiological performance of lactating Sahiwal cows during hot dry summer season. Fifteen lactating cows during the early lactation stage, having similar parity (3), daily milk production (6.2 l), were randomly allocated to three treatments, 5 cows each, i.e., (1) kept under roof shade only, (2) provision of fans along with roof shade, and (3) provision of roof shade, fans, and sprinklers designated as S, SF, and SFS, respectively. The fans were of 360-rpm capacity and showers were on for 40 min after every 90-min interval from 9:00 to 21:00 h. THI values were 81.1?±?0.7, 80.5?±?0.7, and 77.7?±?0.4 under S, SF, and SFS treatments, respectively. Cows were milked twice daily. Respiration rate (RR) and rectal temperature (RT) data were collected at 14:00 h on daily basis. The daily milk production was significantly higher in cows under SF (7.9?±?1 kg) followed by SFS (6.9?±?1.2 kg) and S (6.1?±?0.9 kg) treatments. The mean RT (101.0?±?0.04 °F) was significantly lower in cows under SFS than that on SF and S treatments and similarly mean RR was also lower (21.2 breaths/min) in cows under SFS followed by SF and S treatments. It is concluded that milk production and physiological performance in Sahiwal cows can be improved by fan-assisted ventilation during hot dry summer in subtropical regions. 相似文献
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The present study aimed at examining the amenability of Stereospermum suaveolens DC. to vegetative propagation through rooting of leafy stem cuttings using low-cost polythene propagators. Rooting efficiencies
of cuttings derived from two selected matured mother trees were studied using four different concentrations of Indole-3-butyric
acid (IBA), viz. 0, 0.1, 0.2 and 0.4%. IBA applied at 40 μg per cutting (0.4% concentration) resulted in significantly higher
rooting responses compared to the control (P < 0.05). Differences in the length of longest root for all the treatments were significant (P = 0.05) with cuttings treated with 0.2% IBA producing the longest root. The highest survival after 3 weeks of transference
of the rooted cuttings into polythene bags was found for rooted cuttings treated with 0.2% IBA. Effects of three fertilizer
treatments viz. T0 (no fertilizer), T1 (10 g of Urea + 20 g of TSP + 10 g of MOP dissolved in 1 l of water) and T2 (10 g of Urea + 20 g of TSP + 10 g of MOP dissolved in 2 l of water) on initial growth of established rooted cuttings (stecklings)
of Stereospermum suaveolens in polythene bags were also measured for a period of 90 days. Stem length, collar diameter and leaf area of the stecklings
increased throughout the observation period. Increments of both stem length and collar diameter were significantly higher
for the stecklings treated with T2 in comparison with the control while increment of leaf area was found the highest for the stecklings treated with T1. The study clearly indicated that Stereospermum suaveolens is amenable to vegetative propagation technique using juvenile single-node leafy cuttings and the initial growth performance
of the established rooted cuttings (stecklings) in polythene bags under different fertilizer treatments was satisfactory. 相似文献