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| Soinne, Helena; Saarijärvi, Kirsi; Karppinen, Minna; Hartikainen, Helinä. |
| The objective of this study was to examine the effects of urine and dung additions on the phosphorus (P) chemistry of pasture land and to compare the sensitivity of two soil extraction methods in assessing the P-loading risk. In a field experiment, urine and dung were added to soil in amounts corresponding to single excrement portions and the soil samples, taken at certain intervals, were analysed for pHH2O, acid ammonium acetate extractable P (PAc) and water extractable total P (TPw), and molybdate reactive P (MRPw). Urine additions immediately increased soil pH and MRPw, but no such response was observed in PAc extraction due to the low pH (4.65) of the extractant enhancing the resorption of P. The PAc responded to the dunginduced increase in soil total... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover. |
| Ano: 2008 |
URL: http://orgprints.org/17079/1/soinne.pdf |
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| Manninen, Merja; Saarijärvi, Kirsi; Huhta, Harri; Jauhiainen, Lauri; Aspila, Pentti. |
| The present study evaluated the effects of feeding strategies with alternative feeds on the performance of mature suckler cows and their progeny during indoor feeding and subsequent grazing. In both experiments, a 2 × 2 factorially arranged design consisted of two feeding strategies (Step-up, S; Flat-rate, F) and two diets (Control, C; Alternative, A). The aim of Strategy F was to offer the cows the same amount of energy as offered on Strategy S, but at a constant daily level. In Experiment 1, cows on Diet C were offered grass silage and straw and on Diet A grass silage and a fl our-mill industry by-product. On Strategy S, feeding was stepped with barley (0, 1.5 and 3.5 kg d-1). On Strategy F, barley was offered 1.43 kg per head daily. In Experiment 2,... |
| Tipo: Journal paper |
Palavras-chave: Feeding and growth. |
| Ano: 2004 |
URL: http://orgprints.org/16762/1/manninen.pdf |
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| Saarijärvi, Kirsi. |
| The aim of this study was to measure the main N processes and losses of the N cycle in boreal dairy pasture systems. The experiments were mostly conducted on 'lysimeter field' at MTT Agrifood Research, Maaninka. Pasture N utilization is ineffective compared to silage cutting especially when high amounts of concentrates or protein supplementation is used. Transformations and immobilisation/mineralization turnover of N are high due to short term ley conditions. When the management changes almost yearly, the soil N is in constant state of change and equilibrium is never achieved. Nitrogen is accumulated in soil during grass cover years and mineralized during the renewal year. Thus, N fertilization for newly sown sward and cover crop after pasture renewal is... |
| Tipo: Thesis |
Palavras-chave: Feeding and growth; Air and water emissions. |
| Ano: 2008 |
URL: http://orgprints.org/16618/1/met134a.pdf |
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