Show simple item record

dc.creatorClaret M,Marcelino
dc.creatorUrrutia P,Roberto
dc.creatorOrtega B,Rodrigo
dc.creatorBest S,Stanley
dc.creatorValderrama V,Natalia
dc.date2011-03-01
dc.date.accessioned2019-04-24T21:19:08Z
dc.date.available2019-04-24T21:19:08Z
dc.identifierhttps://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000100018
dc.identifier.urihttp://revistaschilenas.uchile.cl/handle/2250/55594
dc.descriptionConsumption of water contaminated with nitrates is associated with important health effects such as methemoglobinemia and gastric cancer. Intensive agriculture, which uses large quantities of N fertilizer, is the main source of nitrates in water systems. There are several strategies to reduce leaching and increase Nitrogen Use Efficiency (NUE). An experiment was conducted with spring wheat (Triticum aestivum L.) under sprinkler irrigation (center pivot) to determine if adjusted N applications using precision agriculture tools and plant demand resulted in a lower groundwater nitrate load. Evaluated treatments were: produced fertilization (Pr), precision agriculture (Pa), chlorophyll meter (Sm), and control without N (W/N). The ceramic capsule methodology was used to evaluate N leaching losses that were sampled after each irrigation (six) and drainage water was also estimated. Differences among treatments in terms of N loss and grain yield were not significant (p &gt; 0.05). However, N balance showed significant differences (p < 0.01) in soil residual N among treatments. A regression between applied and residual soil N after harvest showed that N, applied as fertilizer, explained 98% of residual soil N variation, which would probably be leached in the following winter since the soil would be bare. It was concluded that NUE can be improved to result in a lower environmental load by using precision agriculture tools and considering plant N demand
dc.formattext/html
dc.languageen
dc.publisherInstituto de Investigaciones Agropecuarias, INIA
dc.relation10.4067/S0718-58392011000100018
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourceChilean journal of agricultural research v.71 n.1 2011
dc.subjectnitrates
dc.subjectprecision agriculture
dc.subjectchlorophyll meter
dc.subjectwheat
dc.titleQuantifying Nitrate Leaching in Irrigated Wheat with Different Nitrogen Fertilization Strategies in an Alfisol


This item appears in the following Collection(s)

Show simple item record