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31.
Hiromichi Mitamura Nobuaki Arai Yukiko Yamagishi Yuuki Kawabata Yasushi Mitsunaga Metha Khachaphichat Thavee Viputhanumas 《Fisheries Science》2009,75(1):175-182
The horizontal and vertical movements of eight immature hatchery-reared (F2) Mekong giant catfish Pangasianodon gigas were monitored using acoustic telemetry in the Mae Peum reservoir, Thailand, from September to December 2005. All tagged
fish were successfully monitored throughout the study period. All fish moved throughout the reservoir for approximately 1 month
after release. Subsequently, their utilized areas became small, and the fish utilized deep areas of the reservoir. The fish
displayed diel spatial movement patterns between deep areas in the day and shallow areas in the night. The vertical movements
of the fish were related to the environment declination such as existence of hypoxic water and thermocline. Our results suggest
that the establishment of a protected area in addition to conventional fisheries regulations may sustain the fish population
in this reservoir. 相似文献
32.
Mu Lan Cai Ming Wang Zongli Liu Jianyong Liu Tianliang Wanapat Metha Huang Bizhi 《Tropical animal health and production》2020,52(1):115-121
Tropical Animal Health and Production - Tropical and subtropical regions were quite short of high-quality protein forage. Ramie (Boehmeria nivea L. Gaud) leaves as crop by products, are rich in... 相似文献
33.
Wanapat Metha Huang Bizhi Viennasay Bounnaxay Totakul Pajaree Matra Maharach Phesatcha Burarat Ampapon Thiwakorn 《Tropical animal health and production》2020,52(5):2593-2598
Tropical Animal Health and Production - Rapeseed provides multi-products as human food and animal feed especially the oil and meal. Rapeseed oil and meal after extraction are nutritious and have... 相似文献
34.
Improving the quality of rice straw by urea and calcium hydroxide on rumen ecology,microbial protein synthesis in beef cattle 下载免费PDF全文
Four rumen‐fistulated beef cattle were randomly assigned to four treatments according to a 4 × 4 Latin square design to study the influence of urea and calcium hydroxide [Ca(OH)2] treatment of rice straw to improve the nutritive value of rice straw. Four dietary treatments were as follows: untreated rice straw, 50 g/kg urea‐treated rice straw, 20 g/kg urea + 20 g/kg calcium hydroxide‐treated rice straw and 30 g/kg urea + 20 g/kg calcium hydroxide‐treated rice straw. All animals were kept in individual pens and fed with concentrate at 0.5 g/kg of BW (DM), rice straw was fed ad libitum. The experiment was conducted for four periods, and each period lasted for 21 days. During the first 14 days, DM feed intake measurements were made while during the last 7 days, all cattle were moved to metabolism crates for total faeces and urine collections. The results revealed that 20 g/kg urea + 20 g/kg calcium hydroxide‐treated rice straw improved the nutritive value of rice straw, in terms of dry matter intake, digestibility, ruminal volatile fatty acids, population of bacteria and fungi, nitrogen retention and microbial protein synthesis. Based on this study, it could be concluded that using urea plus calcium hydroxide was one alternative method to improve the nutritive value of rice straw, rumen ecology and fermentation and thus a reduction of treatment cost. 相似文献
35.
Chaowarit Mapato Metha Wanapat Anusorn Cherdthong 《Tropical animal health and production》2010,42(8):1635-1642
Four crossbreds (75% Holstein Friesian) lactating dairy cows were used to evaluate the effects of sunflower oil (SFO) levels
and roughage source on feed intake, nutrient digestibility, ruminal fermentation, milk yield, and milk composition. Four milking
cows with average liveweight of 410 ± 25 kg and 18 ± 11 days in milk were randomly assigned according to a 4 × 4 Latin square
design, in a 2 × 2 factorial arrangement, with SFO levels (3% or 6%) in the concentrate and the roughage source [rice straw
(RS) or urea-treated RS (UTRS)] being the main factors. Four dietary treatments as (1) 3% SFO + RS, (2) 6% SFO + RS, (3) 3%
SFO + UTRS, and (4) 6% SFO + UTRS were offered ad libitum total mixed ration, with a concentrate/roughage ratio of 60:40.
The results were found that UTRS as a roughage source significantly increased feed intake, digestibility, concentration of
acetic acid in rumen fluid, rumen ammonia–nitrogen, blood–urea nitrogen, milk urea–nitrogen, and milk yield (3.5% fat-corrected milk) compared with cows fed on untreated RS. Supplementation of SFO at 3% in the concentrate-supplemented group having increased
dry matter intake, milk fat percentage, and milk yield (3.5% fat-corrected milk) compared with 6% SFO supplementation. However, there were no interaction effects between level of SFO in the concentrate
and roughage source in any of the factors studied. 相似文献
36.
Anuthida Seankamsorn Anusorn Cherdthong Metha Wanapat Chanadol Supapong Benjamad Khonkhaeng Sutipong Uriyapongson Nirawan Gunun Pongsatron Gunun Pin Chanjula 《Tropical animal health and production》2017,49(1):79-86
The aim of this experiment was to determine the effect of dried rumen digesta pellet levels on feed intake, digestibility, rumen ecology, and blood metabolites in swamp buffalo. Four 2-year-old male swamp buffalo with an initial body weight (BW) of 150?±?10.0 kg were randomly assigned according to a 4?×?4 Latin square design to receive four levels of dried rumen digesta pellets (DRDPs). The dietary treatments were supplementation of DRDP at 0, 50, 100, and 150 g dry matter/day, respectively. Total feed intake was significantly different among treatments (p?<?0.05) and was highest in the 150 g/day DRDP supplement (2.68 kg/day). Intakes of neutral detergent fiber (NDF) and acid detergent fiber did not affect DRDP levels, while intakes of organic matter and crude protein (CP) were altered significantly when 150 g of DRDP was used (p?<?0.05). Buffalo fed with DRDP at 150 g/day had the highest CP and NDF digestibility (p?<?0.05). DRDP supplementation did not affect rumen pH, and temperature and the concentration of ruminal ammonia–nitrogen and blood urea nitrogen were not altered among the treatments. The mean value of fungal zoospores in the buffalo was significantly different among treatments and was highest in supplementation with DRDP at 150 g. The mean value of propionic acid was significantly different at various levels of DRDP; it was highest in the group fed with 150 g DRDP (p?<?0.05). Thus, supplementation of DRDP at 150 g improved feed use and increased fungal zoospore population. In addition, DRDP feeding is recommended, since it has positive economic impacts and helps control environmental pollution. 相似文献
37.
38.
Chunmei Wang Cheng Zhang Tianhai Yan Shenghua Chang Wanhe Zhu Metha Wanapat Fujiang Hou 《Journal of animal physiology and animal nutrition》2020,104(1):22-31
Twelve Hu sheep × thin-tail Han crossbred dry ewes with an average body weight of 32.6 ± 0.68 kg and an age of 3 years were arranged in a 3 × 3 Latin square design, with each experimental period of 24 d to evaluate the effect of substituting alfalfa hay in a portion of concentrate on nutrient intake, digestibility, N utilisation efficiency and methane emissions. The ratios of corn straw to alfalfa to concentrate for 3 diet treatments were 60:0:40, 60:15:25 and 60:30:10, respectively. Intake and digestibility were measured for each of the ewes, which were housed in individual metabolism crates for 6 d after an adaptation period of 14 d, and the feed was offered at 1.2 MEm to ensure approximately 10% orts. Methane emissions were determined in a respiration chamber for 2 consecutive d. An increase in the levels of alfalfa as a substitute for concentrate significantly increased the roughage, NSC and ADF intake and faecal N output as a proportion of N intake and manure N output. Furthermore, this increase in alfalfa input levels decreased DE, ME and N intake; nutrient digestibility; DE/GE, ME/GE and CH4 emissions per day; CH4 output expressed as a portion of the DM, OM and GE intake; and urinary N and ammonia N output, especially between extreme treatments. Alfalfa input levels had no effect on the BW, DM and GE intake; the EB or EB/GE intake; and the retained N. This study indicated that increasing alfalfa input as a substitute for concentrate could significantly decrease the digestibility, CH4 emissions and urinary N and NH4+-N outputs; and shift the N excretion from urine to faeces; and could sustain a similar DM intake. 相似文献
39.
Reducing methane production by supplementation of Terminalia chebula RETZ. containing tannins and saponins 下载免费PDF全文
Nirawan Anantasook Metha Wanapat Pongsatorn Gunun Anusorn Cherdthong 《Animal Science Journal》2016,87(6):783-790
This study investigates the effects of Terminalia chebula Retz. meal supplementation on rumen fermentation and methane (CH4) production by using an in vitro gas technique. The experimental design was a completely randomized design (CRD) and the dietary treatments were T. chebula supplementation at 0, 4, 8, 12, 16 and 20 mg with 0.5 g of roughage and concentrate ratio at 60:40. The results revealed that cumulative gas production (96 h of incubation) were higher (P < 0.01) with T. chebula supplementation at 12, 16 and 20 mg than other treatments. However, in vitro dry matter degradability (IVDMD) and in vitro organic matter digestibility (IVOMD) were not significantly different among treatments (P > 0.05). The NH3‐N concentrations tended to quadratically increase with increasing levels of T. chebula in the diet. In addition, total volatile fatty acids (VFA) and propionate concentrations were increased (P < 0.01), while acetate concentration, acetate‐to‐propionate ratio, CH4 production and protozoal populations were decreased (P < 0.01) when supplemented with T. chebula at 8, 12 and 16 mg, respectively. Based on this study, it could be concluded that supplementation of T. chebula at 12 mg could improve rumen fermentation by reducing CH4 production and protozoa populations, thus improving in vitro gas production and VFA profiles. 相似文献
40.
Nguyen VT Wanapat M Khejornsart P Kongmun P 《Tropical animal health and production》2012,44(3):629-636
The experiment was conducted to determine effects of urea–lime-treated rice straw and urea levels in concentrate on rumen
fermentation, apparent nutrient digestibility, and cellulolytic bacteria population of 4-year-old, rumen-fistulated swamp
buffaloes. All animals were randomly assigned according to a 2 × 2 factorial arrangement in a 4 × 4 Latin square design to
receive four dietary treatments: factor A, two sources of roughage (rice straw and 2%urea + 2%lime-treated rice straw); factor
B, two levels of urea in concentrate mixture (0% and 4%). Roughages were given ad libitum together with 0.3% BW of concentrate.
It was found that voluntary feed intake, the digestibility of DM, OM, CP, NDF, acetate, and propionate concentration were
significantly increased (P < 0.05) by treated rice straw, while NH3-N, BUN, and propionic acid concentration were increased by both factors of treated rice straw and 4% urea in concentrate.
The real-time PCR quantification of Fibrobacter succinogenes and Ruminococcus albus population, and anaerobic fungi were greater (P < 0.05), but the population of Ruminococcus flavefaciens, protozoa, and methanogenic bacteria were reduced (P > 0.05) as influenced by treated rice straw and urea level. In conclusion, the combined use of urea–lime-treated rice straw
and fed with concentrate (4% urea) could improve rumen ecology, rumen fermentation efficiency, and nutrient digestibility
in swamp buffaloes. 相似文献