dc.contributor.author | Ehaliotis, C | en |
dc.contributor.author | Massas, I | en |
dc.contributor.author | Pavlou, G | en |
dc.date.accessioned | 2014-06-06T06:50:23Z | |
dc.date.available | 2014-06-06T06:50:23Z | |
dc.date.issued | 2010 | en |
dc.identifier.issn | 17740746 | en |
dc.identifier.uri | http://dx.doi.org/10.1051/agro/2010016 | en |
dc.identifier.uri | http://62.217.125.90/xmlui/handle/123456789/5024 | |
dc.subject | 15N | en |
dc.subject | Added nitrogen interaction (ANI) | en |
dc.subject | Bell pepper | en |
dc.subject | Capsicum annuum | en |
dc.subject | Fertigation | en |
dc.subject | Green pepper | en |
dc.subject | Nitrate | en |
dc.subject | Urea | en |
dc.subject.other | crop production | en |
dc.subject.other | dicotyledon | en |
dc.subject.other | drip irrigation | en |
dc.subject.other | fertilizer application | en |
dc.subject.other | leaching | en |
dc.subject.other | nitrogen | en |
dc.subject.other | nutrient enrichment | en |
dc.subject.other | nutrient uptake | en |
dc.subject.other | residual soil | en |
dc.subject.other | urea | en |
dc.subject.other | vegetable | en |
dc.subject.other | Capsicum annuum | en |
dc.title | Efficient urea-N and KNO3-N uptake by vegetable plants using fertigation | en |
heal.type | journalArticle | en |
heal.identifier.primary | 10.1051/agro/2010016 | en |
heal.publicationDate | 2010 | en |
heal.abstract | Vegetable production demands high nitrogen inputs. Fertigation is a means to increase fertilizer-N use by plants. However, the effect of different N sources and doses, and how they relate to the total available N in soils are poorly known. In this study we applied 15N-labeled fertilizers to green pepper in the field using a drip irrigation system during the dry summer. KNO3-N and urea-N were applied at a total of 6, 12 and 18 g plant-1. Our results show that urea was as effective as KNO 3 as a N source. The fertilizer-N utilization efficiency was dramatically reduced at higher N doses, from 48% for the 6 g N plant -1 dose to 36% and 26% for the 12 and 18 g N plant-1 doses, respectively. However, the N in plants derived from fertilizer consistently exceeded 60%, indicating high availability of fertilizer-N even at the lowest dose. Negative added nitrogen interactions - the effect of added N on the fate of soil-N - were observed, particularly at high fertilizer-N doses. The fertilizer-N utilization efficiency calculated by the difference method was lower compared with the 15N enrichment method. This clearly indicates luxury N applications and excess N availability brought about by precise localized placement of fertilizer-N that leads to limited uptake of the available soil-N. N leaching risks in the following rain period should therefore be based on both the residual fertilizer-N and the increased amounts of residual soil mineral-N. © 2010 INRA, EDP Sciences. | en |
heal.journalName | Agronomy for Sustainable Development | en |
dc.identifier.issue | 4 | en |
dc.identifier.volume | 30 | en |
dc.identifier.doi | 10.1051/agro/2010016 | en |
dc.identifier.spage | 763 | en |
dc.identifier.epage | 768 | en |
Αρχεία | Μέγεθος | Μορφότυπο | Προβολή |
---|---|---|---|
Δεν υπάρχουν αρχεία που σχετίζονται με αυτό το τεκμήριο. |