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MEKARN Conference 2010 |
The experiment 1 was set up in a field of 500 m2 to measure the productivity and nutritional quality of Hymenachne acutigluna and Paspalum atratum grasses planted on waterlogged soils to examine the productivity, quality and persistence. The two plants are similar in biomass and nutritive value.
The experiment 2 was conducted in expanding on former rice paddy land and set up in a field of 800 m2. Paspalum grass was cultivated in wet land with approximate 20 cm in depth. Four different plant spacing (20 x 50 cm; 30 x 50 cm; 40 x 50 cm and 50 x 50 cm) were conducted showed that plant spacing were not different significantly during four crops in fresh and dry yield and qualitative parameters of the grass (dry matter, crude protein, acid detergent fiber, crude fiber, neutral detergent fiber and in vitro)
The experiment 3 was carried out at dairy farms in Soctrang province, where the Khmer farmers have become familiar with the practise of raising dairy cattle. Fifteen F1 Holstein x Sindhi lactating cows allocated in a randomised block design and the trial period was 60 days. Cows are allocated to treatments on the basis of milk yield, parity and days of lactation. There are three households involved in the study to provide 5 replicates per treatment. In each family, 5 cows are housed in individual stall and offered three different treatments: Control (Paspalum grass ad lib and 0.4 concentrate /kg milk), PC (Paspalum grass ad lib 4 kg/day cottonseed cake) and PCT (Paspalum grass ad lib 1 kg/day cottonseed cake and 1kg Trichantera in DM basis). The rumen supplement was available all the time .
DM intake, milk
production, milk quality and feed conversion to milk were not clearly affected
by different of supplementation. The cows receive a supplemental of cottonseed
cake and Trichanthera has got highest profits.
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Table 1. Effects of ottonseed cake and Trichantera gigantea on intake, milk production, milk quality and feed conversion to milk of dairy cows |
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Parameters |
Treatment |
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Control |
PC |
PCT |
SEM |
P |
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Dry matter intake, g/d |
11.10 |
10.95 |
10.55 |
0.18 |
0.11 |
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Milk parameters* |
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Milk yield, kg/d |
10.88 |
10.85 |
10.19 |
0.21 |
0.06 |
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Milk fat, % |
4.30 |
4.31 |
4.06 |
0.09 |
0.13 |
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Crude protein, % |
3.68 |
3.42 |
3.34 |
0.13 |
0.21 |
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Lactose, % |
4.92 |
4.74 |
4.55 |
0.15 |
0.28 |
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FCR, kg milk |
1.03 |
1.01 |
1.04 |
0.02 |
0.62 |
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Profit, VND/kg milk |
2900a |
3300b |
3400b |
77.1 |
0.003 |
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ab Means without common superscript along rows are different at P<0.05 * Covariance analysis were used using initial milk yield on standard diet as the covariant. |
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