| dc.creator | Alfaro,Marta | |
| dc.creator | Salazar,Francisco | |
| dc.creator | Iraira,Sergio | |
| dc.creator | Teuber,Nolberto | |
| dc.creator | Villarroel,Dagoberto | |
| dc.creator | Ramírez,Luis | |
| dc.date | 2008-06-01 | |
| dc.date.accessioned | 2019-04-24T21:18:43Z | |
| dc.date.available | 2019-04-24T21:18:43Z | |
| dc.identifier | https://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000200004 | |
| dc.identifier.uri | http://revistaschilenas.uchile.cl/handle/2250/55394 | |
| dc.description | In Chile there is little information on nutrient losses in livestock systems. The experiment was carried out between 2004 and 2006. Two stocking rates (3.5 and 5.0 steers ha-1) were tested under rotational grazing with Black and White Friesian steers on a permanent pasture (67.5 kg N and 40 kg P ha-1 yr-1). To quantify surface runoff losses (N, P, K), three surface lysimeters (5 x 5 m) per treatment were established. N and K leaching losses were estimated with ceramic cups. Runoff and leachate samples were individually analyzed for available and total N, reactive (RP) and total P, and K. Dissolved organic N (DON) and organic P (OP) were estimated as the difference between total and available forms. The stocking rate did not increase total N, P and K losses (P > 0.05). Losses in surface runoff were < 0.5 kg N, < 0.05 kg P and < 0.6 kg K ha-1 yr-1, respectively, due to the low amount of runoff measured. Nitrogen leaching losses were high (11 up to 71 kg ha-1 yr-1) and K leaching losses were low (3 to 5 kg ha-1 yr-1). Nitrogen in runoff was mainly lost as DON (50%). Nitrogen leaching losses were mainly as nitrate (70%). Phosphorus was lost as RP (70%). Thus, stocking rates of 5.0 steers ha-1 are plausible, but fertilizer application should be avoided in rainfall periods during the year to reduce incidental nutrient losses. | |
| dc.format | text/html | |
| dc.language | en | |
| dc.publisher | Instituto de Investigaciones Agropecuarias, INIA | |
| dc.relation | 10.4067/S0718-58392008000200004 | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.source | Chilean journal of agricultural research v.68 n.2 2008 | |
| dc.subject | eutrofication | |
| dc.subject | water quality | |
| dc.subject | grazing | |
| dc.subject | Andisol | |
| dc.subject | beef production | |
| dc.title | Nitrogen, Phosphorus and Potassium Losses in a Grazing System with Different Stocking Rates in a Volcanic Soil | |
