Effects of Replacement of Fish Mill with Golden Snail Mill in Ration to Performance of Male Bali Duck

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Introduction
Diversification of meat consumption is needed to accelerate animal protein self-government for Indonesia society.Development of cattle, goat, buffalo, and horse need a broad area, and because of their reproduction level are low, those must be pay more attention in their development in the future.The other ways are chicken and pig farms, but their feeds are expensive; these also a dilemma because there is a competition between a human being and the animals.Duck is one of the potential alternative animal to develop because it easy to rear, more resistant to disease and can use ingredient source of protein which is a rice disease for farmers, golden snail (Cairina Moschata).
Up to now, the obstacle of duck development is low knowledge of farmers about ration quality.Besides that, duck rear traditionally and whims system causes low development of the animal.One of the efforts to increase its productivity can be done through the rear of the intensive system.This system obstacle i.e. cost of ration particularly ingredient source of protein such as fish mill and soybean mill are still expensive.The ration is the most factors affects animal growth rate, but the cost of the ration is the highest portion about 60 -70% of total production.Nuriyasa et al., (2015), stated that waste or material that not use optimally yet can diminish production cost and help the government to create a clean environment farm.
The golden snail is a disease of rice plant since on the age of 10 days after planting.The loss of the snail attack was about 16 -40% total production.But, it is very potential to replace fish mill in duck ration.Nutrient content of golden snail mill is crude protein 46.2%, metabolite energy 1920 kcal/kg, Calcium 2.9% and phosphor 0,3%.Research results of Purnamaningsih (2010), showed that the use of golden snail mill up to 9% in duck ration was no affects to duck egg quality.Furthermore, research results of Sulistiono ( 2007), found that golden snail mill 10% fed to duck could increase growth rate and egg production up to 80%.

Duck
The research used 40 male Bali Duck on the age of 4 weeks that were bought from a duck farmer at Mengwi village, Badung regency.

Pen
The research used litter pen with a size of 60 cm length, 40 wide and 50 cm height.

Research Design
The research used Randomized Block Design (RBD), with 5 treatments and 4 blocks (replicates).Ration treatment (R) consists of: R0: use of 15% fish mill in ration as a control treatment R1: Replacement 25% fish mill with golden snail mill R2: Replacement 50% fish mill with golden snail mill R3: Replacement 75% fish mill with golden snail mill R4: Replacement 100% fish mill with golden snail mill Ration Ration composition and its nutrient content of the research is shown in Table 1 and Table 2

Data Analysis
Data of the research were analyzed with multiple range test, if there was significant amongst the treatments (P < 0.05), it would be continued to Duncan's Test (Steel and Torrie (1980).

Results and Discussions
The end body weight of the animals fed treatment R4 was the lowest (1266.67 g), while the animals fed ration R3 was 8.43% higher (P > 0.05) compare to it.Furthermore rations R2, R1 and R0 were 15.85%, 10.44% and 10.13% respectively higher (P < 0.05) than R4.Those were due to the animal fed R4 and R3 consumed lower ration than the animals fed ration R3, R1, and R0.The lower ration consumption on treatment R3 and R4 might be due to less palatability of those rations compare to R2, R1, and R0.Lysine and methionine amino acids content in ration R3 and R4 were lower than treatment R3, R1 and R0 (Table 2), and much lower than standard need, so meat tissue composed disturbance.Low lysine and methionine amino acids content in treatment R3 and R4 were also caused body weight gain of the animals fed ration R3, R4 was lower than R2, R1, and R0 as Table 3.
The animal fed ration control (R0) consumed the highest ration 2957.54 g, while on the animals fed ration R1, R0, R3, and R4 were 2775.05g,2768.34g,2373.54g and 2430.24grespectively, but statistically no significant difference (P >0.05) than R2.This was due to similar energy and protein of treatment ration, match to opinions of Tillman (1978) and Nuriyasa et al., (2016).Ration conversion of the animal fed control ration treatment (R0) was 3.48 no significant difference (P > 0.05) compare to R1 (3.49), R2 (3.44), R3 (3.58) and R4 (3.66).This was due to higher body weight that needs higher ration consumption and not because of the different efficiency use of nutrition (Nuriyasa et al., 2017).

Conclusion
From the research results could be concluded that fish mill in ration could be replaced with golden snail mill up to 50% without decreased of the animal performance.

Table 3
Performance of Male Bali Duck Fed Ration Replacement of Fish Milk with Golden Snail