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Effect of Partial Green Grass Over Dry Feeding on the Productive Performance of Early Lactating Crossbred Cows in Bangladesh

A. Nahar
Department of Dairy Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.

M. Al-Amin
Department of Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh, Bangladesh.

A. Wadud
Department of Dairy Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.

M. M. Monir
Department of Animal Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.

M. A. S. Khan
Department of Dairy Science, Bangladesh Agricultural University, Mymensingh, Bangladesh.

Abstract/ Executive Summary:

An experiment was conducted with a view to determe the effect of partial green grass over dry feeding on the productive performance of early lactating crossbred cows. With that in view, fifteen early lactating crossbred cows having nearly similar body weight, body condition score, milk yield and stage of lactation were selected and divided into three groups composed of five in each group (A, B and C group). Cows of A group received 2 kg concentrates without green grass daily. Group B and C received daily 1.85 kg conc. + 3 kg green grass and 1.75 kg conc. + 6 kg green grass respectively along with ad libitum straw for each cow of all groups. Daily feed intake were recorded. Live weight changes of cows were measured fortnightly and condition scores were measured before starting and at the end of the experiment. Milk composition (fat, SNF, protein and ash) as percentage were determined monthly. The average daily DM intake were 7.07±0.12, 7.16±0.03 and 7.78±0.04 kg for A, B and C group, respectively. This study showed that the DM intake, live weight gain, body condition score, milk yield and milk composition in respect of fat, SNF and protein were significantly (p<0.01 and p<0.05) higher in C group followed by B group and lowest values obtained in A group. Considering the present research findings, it could be concluded that, the partial green grass over dry feeding had positive effect on the productive performance of early lactating crossbred cows.

Keywords: Green grass, Dry Feed, Ad libitum, Performance, Crossbred cows

Location: Dairy Farm, Department of Dairy Science, Bangladesh Agricultural University, Mymensingh.

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Cow, Straw

Objectives:

To determine the effect of partial green grass over dry feeding on the productive performance of early lactating crossbred cows.

Methodology:

The research program was carried out at the Dairy Farm of the Department of Dairy Science, Bangladesh Agricultural University, Mymensingh. Fifteen early lactating crossbred dairy cows, nearly similar in body weight, body condition, stage of lactation and milk yield were used in this experiment for a period of 120 days. Each of the more similar five cows with respect to the above considerations was allotted to one of the three groups at random. The experimental diets were formulated with rice straw, green grass, wheat bran, till oil cake and rice polish. All the groups were given 2, 1.85 and 1.75 kg concentrate mixture containing 1, 0.85 and 0.75 kg wheat bran for A, B and C group, respectively, but 0.5 kg till oil cake and 0.5 kg rice polish supplied to all groups. 0.5% common salt was supplied as mineral supplement. Diet for A group was considered as control having without green grass, diet for B and C group having 3 and 6 kg green grass, respectively with limited concentrate mixture. Ad libitum straw was supplied as a basal diet to the cows of all groups. The ration was formulated according to Agricultural Research Council (ARC, 1980). In every morning and evening before feeding the cows, each of the ration was weighed carefully and quantity of feed supplied to individual cows was recorded daily. From the second day of feeding trial, before supplying feed to the cows, the leftover of the feed was collected, weighed and recorded. The refused feed of each individual cows during 24 h was deducted from the supplied feed to the cow on the dry matter basis. Clean water was supplied in every morning. Feed intake and live weight gain of each cow were recorded daily and fortnightly, respectively. Body condition scores were estimated before the start and after the end of the experiment. Milk samples were collected from each cow and were analyzed before the start and every after 30 days up to the end of the experiment. All the feed stuffs used in this experiment were analyzed at the beginning of the trial in the Animal Science Laboratory of the faculty of Animal Husbandry of Bangladesh Agricultural University, Mymensingh for dry matter and crude protein content. Degradability values and metabolizable energy content of feed stuffs were estimated according to Scottish Agricultural Colleges, 1984. Milk protein and milk fat were analyzed by Kjeldahl method and Gerber method, respectively. Statistical analysis of the collected information were carried out by using analysis of variance (ANOVA) technique by a computer using a MSTAT Statistical Computer Package program in accordance with the principle of Completely Randomized Design (CRD). In case of significant difference, LSD (Least Significant Difference ) test was performed to monitor the significant difference among different treatment means.

Source of Information: International Journal of Dairy Science, 2(1): 73-78, 2007, ISSN 1811-9700.

Article Link (Online Journal): DOI: 10.3923/ijds.2007.73.78; URL: http://scialert.net/abstract/?doi=ijds.2007.73.78

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the result , it could be advocated that, the early lactating crossbred cows of C group performed best than those of the A and B group. For that, supply of partial green grass with straw based diets was found to be beneficial to sustain productive performance of crossbred cows. Thus, providence of partial green grass over dry feeding would not only support better utilization but also would reduce extra load on concentrates and eventually make it financially profitable for the dairy cow owner.

Knowledge Management: Journal