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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1016/j.plaphy.2021.05.019
|2 doi
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|a pubmed25n1086.xml
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|a (DE-627)NLM326013377
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|a (NLM)34052682
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|a (PII)S0981-9428(21)00266-7
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|a DE-627
|b ger
|c DE-627
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|a eng
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|a Colpaert, Ben
|e verfasserin
|4 aut
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|a Experimental approach to assess fertilizer nitrogen use, distribution, and loss in pear fruit trees
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 15.06.2021
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|a Date Revised 15.06.2021
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Copyright © 2021 Elsevier Masson SAS. All rights reserved.
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|a Enhanced use efficiency of fertilizer nitrogen (N) is paramount for sustainable pear fruit production. Sufficient fruit N content is a major factor for pear fruit storage potential, but fertilizer N use efficiency in pear fruit trees is generally low. The objective of this work was to test a methodology to quantify N uptake, partitioning and leaching loss as influenced by different calcium nitrate (Ca(NO3)2) fertilizer timings. To this end, 10-year-old 'Conference' pear trees (Pyrus communis L.) were transplanted and grown in soil-filled pallet boxes subjected to different timing of fertilizer addition. A fraction of the calcium nitrate was labelled with 15N and applied one month before full bloom, during summer and post-harvest. By sampling newly formed biomass (i.e., leaves, fruit and flower buds), temporal dynamics in the N fraction derived from calcium nitrate fertilization were determined. Simultaneously NO3- leaching derived from calcium nitrate fertilization was quantified. Our data suggest that spring application of N was most efficiently partitioned to leaves, fruits and buds at the time of harvest with a mean percentage of calcium nitrate derived N (Ndff) of 9.2%, 20.4% and 18.6%, respectively. Summer application of calcium nitrate was far less efficient at the time of harvest with Ndff of 0.56%, 0.89% and 1.4%, respectively, and substantially higher NO3- leaching was observed compared to spring fertilization. Post-harvest application showed even higher levels of leaching. Applying a split fertilization scheme with 60 kg N ha-1 evenly spread over spring, summer, and post-harvest, about 9, 15 and 30%, respectively, of the fertilizer N had leached out as NO3- at the end of the growing season. This experimental approach may offer potential for detailed N budget studies for various fruit tree studies
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|a Journal Article
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|a (15)N isotope
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|a Fertilizer use efficiency
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|a Fruit quality
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|a N fertilization
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|a Pyrus communis
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|a Uptake and distribution
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|a Fertilizers
|2 NLM
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|a Nitrates
|2 NLM
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|a Soil
|2 NLM
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|a Nitrogen
|2 NLM
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|a N762921K75
|2 NLM
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|a Steppe, Kathy
|e verfasserin
|4 aut
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|a Gomand, Ann
|e verfasserin
|4 aut
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|a Vanhoutte, Bart
|e verfasserin
|4 aut
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|a Remy, Serge
|e verfasserin
|4 aut
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|a Boeckx, Pascal
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Plant physiology and biochemistry : PPB
|d 1991
|g 165(2021) vom: 05. Aug., Seite 207-216
|w (DE-627)NLM098178261
|x 1873-2690
|7 nnas
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|g volume:165
|g year:2021
|g day:05
|g month:08
|g pages:207-216
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|u http://dx.doi.org/10.1016/j.plaphy.2021.05.019
|3 Volltext
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