Thư viện

Phí Như Liễu, Hoàng Thị Ngân và Đinh Văn Cải

Phí Như Liễu, Nguyễn Văn Tiến và Hoàng Thị Ngân

TÓM TẮT

Bò cái lai Zebu ở An Giang được gây động dục đồng loạt và gieo tinh nhân tạo nhằm tạo con lai Brahman, Droughtmaster và Red Angus. Tỷ lệ phối giống đậu thai đạt được từ 54,54-75,00% tùy thuộc công thức áp dụng. Bê lai Brahman, lai Red Angus và lai Droughtmaster đạt khối lượng lúc 12 tháng tuổi tương ứng 216,8 kg, 218,5 kg và 228,8 kg. Tỷ lệ nuôi sống của bê lai giai đoạn 0-12 tháng tuổi đạt 98,33%.

Từ khóa: gây động dục đồng loạt, bê lai Brahman, lai Red Angus, lai Droughtmaster

Nguyễn Thị Thủy, Phí Như Liễu và Nguyễn Văn Tiến

ABSTRACT

Effect of spacing and levels fertilizer on yield and quality of Panicum maximum cv. Hamil

Two experiments were conducted at the Ruminant research and Development Center, Binh Duong, from 2017 to 2018 to study effect of 3 different planting densities (experiment 1: 50, 60 and 70 cm) and 3 levels of fertilizer (experiment 2: 30, 40 and 50 ton/ha) on yield and quality of Hamil grass, which should be used a guidelines for Hamil grass growing procedure. Results showed that, the best planting space was 60 cm (28.1 ton/ha), VCK (dry matter) yield 6.0 ton/ha, protein yield 0.67 ton/ha. Hamil grass in the trial gave the highest efficiency with application of 50 ton/ha. The fertilizer application could also improve nutritional quality of Hamil grass, especially it could enhance the content of crude protein. It was therefore recommended to plant Hamil grass with a density of 60cm and levels of fertilizer application of 50 ton/ha.

Key words: Fertilizer, Planting density, Panicum maximum cv. Hamil.

Nguyễn Thị Thủy, Đoàn Đức Vũ và Ngô Hồng Phượng

ABSTRACT

 The experiment was designed in incidental conjugation method for 20 cross-bred cows HF (Holstein Friesian) with the target of comparing the effects between fermented total mixed ration (FTMR) food rationand the traditional feeding method on milk production. Maize stem, rice bran, cornmeal, groundnut oil cake, sugarcane molasses, beverage residue, cassava residue and concentrate have been used in the experiment. Milk production has been monitored individually every day. Milk quality (dry matter, fat, protein and lactose) has been analyzed with 1 sample/cow by Funke Gerber Lactostar 3510-123303 machine. The results have been shown. The costfor feed (each kg of milk) force sapplied with FTMR and the traditional feeding method considerably reduced (4734 VND in FTMR and 5381 VND in the traditional method). Indicators on feed quantities, milk capacity and quality show no difference between experimented samples and counter samples. Conclude, FTMR can be popularly applied in reality of cow feeding to help peasants to make use of agricultural raw materials in the region and food can be preserved in long time. This method also actively assists us to prepare food source for cows in dry season without any breeding efficiency.

 Key words: Dairy, FTMR, economic benefits, milk yield. 

Tổng số các bài đã đăng: 9 bài trong đó

- Di truyền - giống: 2

- Dinh dưỡng thức ăn chăn nuôi: 2

- CNSH và các vấn đề khác: 5

Lê Thanh Hải, Dương Xuân Tuyển và Hồ Văn Thế

Tương quan  giữa ba tính trạng khối lượng cơ thể, dài thân và vòng ngực 7 tuần tuổi đều là tương quan thuận. Tương quan di truyền giữa khối lượng cơ thể và độ dài thân là 0.59;  giữa khối lượng cơ thể và vòng ngực là 0.79 và giữa dài thân và vòng ngực là 0.71. Khuynh hướng di truyền cho thấy kết quả chọn lọc bình ổn qua 4 thế hệ, chọn lọc tăng 5,84g/ thế hệ 

Tổng các bài đã đăng trong số 108 tháng 2 năm 2020: 

- Tổng quan: 2

- Dinh dưỡng và thức ăn: 6

Tổng số lượng đã đăng trong số 107 tháng 2 năm 2020:

- Di truyền giống: 4

- Dinh dưỡng thức ăn: 3

- CNSH và các vấn đề khác: 2

Miaomiao Niu, Lei Xiang, Yaqian Liu, Yuqiong Zhao, Jifang Yuan, Xin Dai and Hua Chen

Objective: Adipose tissue is no longer considered as an inert storage organ for lipid, but instead is thought to play an active role in regulating insulin effects via secretion adipokines. However, conflicting reports have emerged regarding the effects of adipokines. In this study, we investigated the role of adipokines in glucose metabolism and insulin sensitivity in obese Bama mini-pigs.

Methods: An obesity model was established in Bama mini-pigs, by feeding with high-fat and high-sucrose diet for 30 weeks. Plasma glucose and blood biochemistry levels were measured, and intravenous glucose tolerance test was performed. Adipokines, including adiponectin, interleukin-6 (IL-6), resistin and tumor necrosis factor alpha (TNF-α), and glucose-induced insulin secretion were also examined by radioimmunoassay. AMP-activated protein kinase (AMPK) phosphorylation in skeletal muscle, which is a useful insulin resistance marker, was examined by immunoblotting. Additionally, associations of AMPK phosphorylation with plasma adipokines and homeostasis model assessment of insulin resistance (HOMA-IR) index were assessed by Pearce's correlation analysis.

Results: Obese pigs showed hyperglycemia, high triglycerides, and insulin resistance. Adiponectin levels were significantly decreased (p<0.05) and IL-6 amounts dramatically increased (p<0.05) in obese pigs both in serum and adipose tissue, corroborating data from obese mice and humans. However, circulating resistin and TNF-α showed no difference, while the values of TNF-α in adipose tissue were significantly higher in obese pigs, also in agreement with data from obese humans but not rodent models. Moreover, strong associations of skeletal muscle AMPK phosphorylation with plasma adiponectin and HOMA-IR index were obtained.

Conclusion: AMPK impairment induced by adiponectin decrease mediates insulin resistance in high-fat and high-sucrose diet induction. In addition, Bama mini-pig has the possibility of a conformable model for human metabolic diseases.

Keywords: Bama Mini-pig; Insulin Resistance; Adiponectin; AMP-activated Protein Kinase 

Taejeong Choi, Dajeong Lim, Byoungho Park,  Aditi Sharma, Jong-Joo Kim, Sidong Kim and Seung Hwan Lee

Objective: Intramuscular fat is one of the meat quality traits that is considered in the selection strategies for Hanwoo (Korean cattle). Different methods are used to estimate the breeding value of selection candidates. In the present work we focused on accuracy of different genotype relationship matrices as described by forni and pedigree based relationship matrix.

Methods: The data set included a total of 778 animals that were genotyped for BovineSNP50 BeadChip. Among these 778 animals, 72 animals were sires for 706 reference animals and were used as a validation dataset. Single trait animal model (best linear unbiased prediction and genomic best linear unbiased prediction) was used to estimate the breeding values from genomic and pedigree information.

Results: The diagonal elements for the pedigree based coefficients were slightly higher for the genomic relationship matrices (GRM) based coefficients while off diagonal elements were considerably low for GRM based coefficients. The accuracy of breeding value for the pedigree based relationship matrix (A) was 13% while for GRM (GOF, G05, and Yang) it was 0.37, 0.45, and 0.38, respectively.

Conclusion: Accuracy of GRM was 1.5 times higher than A in this study. Therefore, genomic information will be more beneficial than pedigree information in the Hanwoo breeding program.

Keywords: Intramuscular Fat; Genomic Relationship Matrix; Genomic Selection