Effect of ambient management interventions on the production and physiological performance of lactating Sahiwal cattle during hot dry summer     

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   

Epidemiological assessment of clinical poultry cases through the government veterinary hospital-based passive surveillance system in Bangladesh: a case study     

Rahman  Md. Ashiqur  Rahman  Md. Mahbubur  Abdullah  Md. Sadeque  Sayeed  Md. Abu  Rashid  Md. Harun  Mahmud  Rashed  Belgrad  Joseph P.  Hoque  Md. Ahasanul 《Tropical animal health and production》2019,51(4):967-975

  相似文献   

Different ambient management intervention techniques and their effect on milk production and physiological parameters of lactating NiliRavi buffaloes during hot dry summer of subtropical region     

Ahmad  Mehtab  Bhatti  Jalees Ahmed  Abdullah  Muhammad  Ullah  Rahman  ul Ain  Qurat  Hasni  Muhammad Sajid  Mahboob Ali  Rashid  Abdul  Qaisar  Imran  Rashid  Ghazunfar  Uddin  Rafi 《Tropical animal health and production》2019,51(4):911-918

Tropical Animal Health and Production - In tropical countries, one of the major threats for diary animal production is climate change. Ambient management interventions are beneficial and are the...  相似文献   

The effect of food deprivation on the rate of sulfamethazine elimination in goats     

A. S. Abdullah  J. D. Baggot 《Veterinary research communications》1988,12(6):441-446

The disposition kinetics and cumulative urinary excretion of sulfamethazine were compared in goats fed normally (control) and following a 72-hour period of starvation (fasting). The only pharmacokinetic parameter which showed a statistically significant difference between the two groups was the body (systemic) clearance. This decreased from 2.26±0.28 ml/min· kg ( ±SD, n=6) in the control group to 1.16±0.54 ml/min·kg in the fasting group (p<0.01). Since the apparent volume of distribution was not affected by starvation, the decreased clearance was attributed to slower metabolism of the drug. Because of the analytical method used to measure sulfamethazine concentrations in plasma and urine, no conclusion could be drawn as to whether the rates of hydroxylation or of acetylation, or both metabolic pathways were decreased in the starved condition.  相似文献   

Feeding soywaste or pellet on performance and carcass characteristics of post-weaning kids     

Mohammad Mijanur Rahman  Wan Embong Wan Khadijah  Ramli Bin Abdullah 《Tropical animal health and production》2016,48(6):1287-1290

  相似文献   

Cross compatibility between Abelmoschus esculentus and A. moschatus   总被引：1，自引：0，他引：1  

M. Abdullah Yousuf Akhond  M. Abul Hossain Molla  M. Obaidul Islam  Mohammad Ali 《Euphytica》2000,114(3):175-180

Interspecific cross compatibility between cultivated and wild okra (Abelmoschus esculentus and A. moschatus) and pollen tube growth behaviour in the crosses among a local cultivar of A. esculentus, A. moschatus and their F₁s were studied. Fruit set was observed in all the crosses except one and seed setting was absent in two of the crosses which set fruit. All seed produced were shrivelled but F₁ plants were obtained from two crosses where cultivated okra was used as the seed parent. The F₁ plants were perennial in nature with very low pollen viability and seed set. A high percentage of pollen germination and profuse pollen tube penetration in the style were observed in the cross A. esculentus × A. moschatus but low pollen tube penetration with abnormal pollen tubes was observed in the reciprocal cross. The number of pollen tubes was very low but they appeared to be normal in the backcross A. esculentus × F₁, but were generally abnormal in the reciprocal cross. Both pre- and postzygotic barriers seemed to occur in crosses between the two species. The present studies indicate that these barriers can be overcome and desirable characters from A. moschatus transferred to cultivated okra using conventional hybridisation techniques. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Effect of resin content and pressure on the performance properties of rubberwood-kenaf composite Board Panel     

Majid Dehghan Nayeri  Paridah Md Tahir  Mohammad Jawaid  Jalaluddin Harun  Luqman Chuah Abdullah  Edi Suhaimi Bakar  Samaneh Keshani  Farideh Namvar 《Fibers and Polymers》2014,15(6):1263-1269

The possibility of manufacturing rubberwood and kenaf (Hibiscus cannabinus L.) stem medium density fibreboard (MDF) panels at different pressure and resin content were investigated. The effect of mechanisms of interacted independent variables (resin content and pressure) on MDF properties was analyzed. The board performance was evaluated by measuring internal bond (IB) strength, modulus of rupture (MOR), modulus of elasticity (MOE), water absorption (WA) and thickness swell (TS). The test results were statistically analyzed by using response surface method (RSM) to determine the significant independent variables that influenced MDF properties. A mathematical simulation or response surface models were developed to predict the MDF properties (MOR, MOE, IB, WA and TS). The obtained results showed that MDF density and all interactions between the experimental variables were significant factors that influenced the mechanical properties of MDF. At 8 bar and 14 % resin content, the MDF recorded WA of 83.12 % and TS of 20.2 %. It can be inferred that two parameters (resin content and pressure) had positive effect on physical and mechanical properties of MDF. We concluded that resin content show more significant effects on MDF manufacturing as compared to pressure parameters.  相似文献   

The changing landscape of mangroves in Bangladesh compared to four other countries in tropical regions     

S. M. Mijan Uddin  A. T. M. Rafiqul Hoque  Saiful Arif Abdullah 《林业研究》2014,25(3):605-611

Loss of mangroves and consequent habitat fragmentation is a major concern throughout the world's tropical countries. Conversion of mangrove habitat due to aquaculture, agriculture, urbanization and industrialization, ecotourism, overlapping bureaucracy and conflicting policies is occurring at a striking rate. This paper reviews the trends of mangrove area changes in Bangladesh and compares them with four other countries in tropical regions that have significant mangrove areas. The rate of mangrove loss from the 1980 to 2005 was calculated using the compound interest rate formula for its explicit biological implication. In Bangladesh, the area of mangroves was found to have increased due to its higher accretion rate. In India the rate of mangrove loss had fallen. The rate of mangrove loss in Malaysia in the 1990s(-0.008 ha·a-1) was higher than the 1980s(-0.004 ha·a-1). In Indonesia, the rate decreased, from the 1980s(-0.018 ha·a-1) to the 1990s(-0.010 ha·a-1). Finally in Myanmar the rate of mangrove loss gradually accelerated. Aquaculture was found to be the common cause of mangrove conversion in the regions. Loss of mangroves is now a prominent global issue, associated with the loss of biodiversity, deterioration of habitat integrity, climatic changes, the amount of carbon sequestration, and resulting sea-level rise. Therefore, a systematic evaluation of these environmental impacts is prerequisite to realize sustainable mangrove management.  相似文献   

Community ecology and spatial distribution of trees in a tropical wet evergreen forest in Kaptai national park in Chittagong Hill Tracts,Bangladesh     

S. M. Feroz  Md Rabiul Alam  Prokash Das  Abdullah Al Mamun 《林业研究》2014,25(2):311-318

We investigated the floristic composition, woody species diversity and spatial distribution of trees in a tropical wet evergreen forest in Kaptai national park in Chittagong Hill Tracks, Bangladesh. We recorded 25 families, 37 genera, 40 species and 1771 woody individuals in a 0.09 ha plot. Euphorbiaceae and Moraceae were the most speciesrich families, and Castanopsis, Ficus and Terminalia were the most species-rich genera. Bursera serrata Wall. ex Colebr. was the dominant species in terms of highest importance value(13%). Trema orientalis(L.)Bl was typically a light demanding species as it appeared in the top canopy with only one individual having the seventh highest IV, but had no regeneration. The expected maximum number of species(Smax) was 140,indicating that many species may invade the forest as the Smax is greater than the recorded total number of species. The nature of the disappearance and appearance of species in the present forest reflects instability of floristic composition. The values of Shannon's index H ′ and Pielou's index J ′(evenness) were 3.36 bit and 0.63, respectively. These values show moderately high species diversity as compared to other subtropical forests in the tropics. In addition, a sample area of 200 m2 in this forest would be sufficient for measuring the diversity indices H ′ and J ′,whereas the trend of J ′may indicate the rate of equality of individuals among the different species decreased with increasing area. The distribution pattern for the total stand was completely random. However, the dominant species showed aggregate distribution for small areas, but random distribution for large areas. The spatial association between species showed that the strongest positive interspecific association occurred between Streblus asper Lour. and Castanea indica Roxb.(ω =0.51). As a whole, most species were weakly associated with each other,of which 58% species associations were completely negative. The result of cluster analysis showed that species pairs were spatially independent at all or most small clusters; stands of species from all clusters are mosaics of complete habitat and pioneer habitat. All patches in this forest community have similar habitat and regeneration niches, which could be a phenomenon for a young growth forest. Thus, the existence of habitat and regeneration niches may be an important factor in the maintenance of diversity in this forest.  相似文献   

Hydrothermal decomposition of various crystalline celluloses as treated by semi-flow hot-compressed water     

Rosnah Abdullah  Kazuyoshi Ueda  Shiro Saka 《Journal of Wood Science》2014,60(4):278-286

Various types of crystalline celluloses I, II, III_I, III_II, IV_I and IV_II that have been adjusted for their degree of polymerization were treated by semi-flow hot-compressed water (HCW) at 230–270 °C/10 MPa/15 min to study their hydrothermal decomposition. The treatments resulted in either partial or complete decomposition of the celluloses and the decomposed products were primarily recovered as hydrolyzed, dehydrated and fragmented ones as well as organic acids in the water-soluble (WS) portions. Their results of hydrothermal decomposition and its kinetics revealed that the celluloses decomposition is dependent on the types of crystalline celluloses as well as temperature of the HCW treatment. The outcome from the WS portions at 270 °C/10 MPa/15 min showed that the degree of difficulty for decomposition is lower in group II (cell II, cell III_II, cell IV_II) than group I (cell I, cell III_I, cell IV_I), indicating that group II is less resistant to decomposition by HCW treatment. Therefore, the decomposition behaviors of the cellulose are due to the inherent differences in the crystalline structures.  相似文献