| 1. |
- Nadeau, Elisabet, et al.
(författare)
-
Protein quality of grass silage as affected by silage additives and its effects on dairy cow performance
- 2015
-
Ingår i: Journal of Animal Science. - 0021-8812 .- 1525-3163. ; 93, s. 206-
-
Konferensbidrag (refereegranskat)abstract
- This experiment was conducted to evaluate the effects of improved protein quality of grass silage by additive use on dairy cow intake and performance. Grass from the first regrowth was wilted to 33% DM before being precision chopped and treated with the inoculant Kofasil Duo (Lactobacillus plantarum/Lactobacillus buchneri, 200,000 cfu/g) or with the chemical additive Kofasil Ultra K (sodium nitrite, hexamine, potassium sorbate, sodium benzoate and sodium propionate, 2 L/T, Addcon Europe GmbH), which were compared with a control without additive. The forage was ensiled in hard-pressed round bales before being fed to 48 dairy cows (150 DIM) in a continuous trial for 9 wk using 8 cows per treatment. Cows were blocked according to breed, parity, DIM and milk yield. The silage contained 15% CP, 47% NDF, 3.3% WSC, 8.2% lactic acid, 2.1% acetic acid and 0.25% NH3-N of DM with minor differences between treatments. Rumen undegradable protein (RUP) of the silage at 5% passage rate was 22, 23 and 24% of CP for control (C), inoculant (I) and salt-based (S) additive, respectively. Diets were isonitrogenous (15.1% of DM) and isoenergetic (11.4 MJ/kg DM) varying in RUP (4.7% (high) and 2.5% (low) of DM). Concentrate UDP was 2.9 and 8.6% of DM. Dietary forage proportion of the TMR was 58% of DM. Data were analyzed using PROC MIXED of SAS with RUP, silage and week as fixed factors and block as a random factor. High RUP diet had higher milk yield than low RUP diet (29.4 vs. 27.9 kg; P < 0.05). The DM intake was not affected by RUP and silage treatment. Yields of milk and ECM were higher for the I and S diets than for the C diet at low RUP (28.9 vs. 26.0 kg milk, P < 0.01; 30.6 vs. 27.1 kg ECM, P < 0.001) whereas there was no effect of additive treatment in the high RUP diet. Milk fat and protein did not differ between silage treatments. Feed efficiency was higher for the I and S diets than for the C diet at the low RUP (1.6 vs. 1.3 kg of ECM/kg DM intake, P < 0.001) but not at the high RUP. The increased milk yield and feed efficiency when fed a diet with low RUP can partly be explained by increased RUP of the I and S silages.
|
|
| 2. |
|
|
| 3. |
|
|
| 4. |
|
|
| 5. |
|
|
| 6. |
- Mattsson, Eskil, 1981, et al.
(författare)
-
Carbon stock and tree diversity of dry-zone homegardens in southern Sri Lanka
- 2014
-
Ingår i: Book of Abstracts - World Congress on Agroforestry.
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Tropical homegardens hold a large potential for climate change mitigation and adaptation due to their multi-functional role in providing income and ecosystem services while decreasing pressure on natural forests. However, there is still lack of quantitative data on homegardens and their landscape potential for carbon sequestration services. In this study, tree diversity and above-ground biomass carbon of woody species was estimated on dry-zone homegardens in the dry south-eastern part of Sri Lanka. A total of 45 homegardens were sampled on size, floristic composition of trees, diameter at breast height (GBH) and height of trees. In total, 4278 trees were sampled and 82 different tree species were recorded. The Shannon Wiener index used to evaluate biodiversity ranged from 0.76–3.01 with a mean value of 2.05. Using allometric models, we find a mean above-ground biomass stock of 13 Mg carbon (C) ha-1 with a large range among homegardens (1–56 Mg C ha-1, n=45) due to a variation of tree diversity, species and composition between individual homegardens. Per unit area basis, mean above ground carbon stock was higher in small homegardens (<0.2 ha, 26 Mg C ha-1, n=11) than medium (0.4–0.8 ha, 9 Mg C ha-1 n=27) and large (>1 ha, 8 Mg C ha-1, n=7) homegardens due to a higher tree density. The results show a vast heterogeneity in terms of carbon and biological diversity within the dry zone homegardens; results that will contribute to closing the knowledge gap of the less studied dry-zone homegarden systems and their functions in storing carbon and providing multi-functional benefits to its users. The results are also useful for whether homegardens should directly or indirectly be considered to be included as an activity within Sri Lanka’s newly commenced UN-REDD National Programme.
|
|
| 7. |
- Mogren, Lars, et al.
(författare)
-
Placed Nitrogen Starter Fertilizer Strategy for Field Grown Iceberg Lettuce (Lactuca sativa)
- 2012
-
Ingår i: Acta Horticulturae. - 0567-7572 .- 2406-6168. ; 936, s. 299-304
-
Konferensbidrag (refereegranskat)abstract
- The production of iceberg lettuce (Lactuca sativa) has been shown to be a potential source of nitrogen (N) leaching to ground water. Growers are concerned that reduced levels of N will lead to reduced yield and lowered quality. Experiments with a wide range of N levels the previous season showed that placed N fertilizer at planting had potential to reduce total N levels needed. This project was designed to verify these findings with use of commercially used, and lower, levels on N. The N content in the lettuce dry material at harvest and the N content in the soil profile (N-min) at several stages during the season were studied. By using placed starter N fertilizer, the total amount of N applied could be reduced by more than 25% without loss in yield or lowered quality. By using this strategy the risk of N leaching from the field could be significantly reduced at planting, during growth and after harvest.
|
|
| 8. |
- Alström, Sadhna, et al.
(författare)
-
Chromatographic profiling of hydrophilic metabolites from tubers of different potato cultivars
- 2009
-
Konferensbidrag (refereegranskat)abstract
- Potato is an important source of nutrients and bioactive compounds with profitable effect for health, such as antioxidants, vitamins and essential amino acids. The knowledge about metabolite composition of various potato cultivars is necessary to facilitate development of new cultivars with desirable properties. In the present study, the hydrophilic metabolite composition of six potato cultivars with different resistance against potato late blight disease was analyzed. For this, an HPLC-based method was developed and used for the analysis of water-ethanol extracts of freeze-dried potato tubers. Significant differences in concentrations of adenosine, chlorogenic acid, and rutin were revealed. Some other metabolites were found to be cultivar-specific
|
|
| 9. |
|
|
| 10. |
|
|
