Using crop reflectance to determine sidedress N rate in potato saves N and maintains yield

F.K. van Evert, R. Booij, J.N. Jukema, H.F.M. ten Berge, D. Uenk, E.J.J. Meurs, W.C.A. van Geel, K.H. Wijnholds, J.J. Slabbekoorn

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

A low basal N application combined with in-season adjustment of the sidedressNrate has been proposed as a means to saveN in growing potato (Solanum tuberosum L.). We hypothesize that a measurement of canopy reflectance provides information which can be used to adjust sidedressNrate. The objective of our work was to develop and test a canopy reflectance-based Nsidedress system for potato in humid climates. In four years of experiments with ware potato on a sandy soil it was determined that the reflectance index WDVI correlates well with N uptake, that sidedressN should be applied at around the time of canopy closing, and that the sidedressNrate should be calculated as the difference between a (fixed) desired N uptake and a reflectance-based measurement of N uptake. The calculated N saving in these experiments was between 10 and 109 (average 56) kg N ha-1. The reflectance-based Nsidedress system was tested at an additional two locations, with ware potatoes on a loamy soil and with starch potatoes on a sandy soil, in two further years of experiments. N saving in these experiments was between 8 and 88 (average 44) kg N ha-1. In both sets of experiments, yields with the sidedress system were generally at the same level as yields obtained with recommended Nrates (basal N only). We conclude that the reflectance-based sidedressN system allows saving of N while maintaining yield
Original languageEnglish
Pages (from-to)58-67
JournalEuropean Journal of Agronomy
Volume43
DOIs
Publication statusPublished - 2012

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potato
reflectance
potatoes
crop
crops
canopy reflectance
experiment
sandy soil
canopy
sandy soils
humid zones
starch
potato starch
loam soils
Solanum tuberosum
rate
climate
soil
testing

Keywords

  • nitrogen status
  • fertilizer nitrogen
  • light reflectance
  • chlorophyll meter
  • vegetation index
  • management
  • soil
  • sensor
  • corn
  • recommendations

Cite this

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title = "Using crop reflectance to determine sidedress N rate in potato saves N and maintains yield",
abstract = "A low basal N application combined with in-season adjustment of the sidedressNrate has been proposed as a means to saveN in growing potato (Solanum tuberosum L.). We hypothesize that a measurement of canopy reflectance provides information which can be used to adjust sidedressNrate. The objective of our work was to develop and test a canopy reflectance-based Nsidedress system for potato in humid climates. In four years of experiments with ware potato on a sandy soil it was determined that the reflectance index WDVI correlates well with N uptake, that sidedressN should be applied at around the time of canopy closing, and that the sidedressNrate should be calculated as the difference between a (fixed) desired N uptake and a reflectance-based measurement of N uptake. The calculated N saving in these experiments was between 10 and 109 (average 56) kg N ha-1. The reflectance-based Nsidedress system was tested at an additional two locations, with ware potatoes on a loamy soil and with starch potatoes on a sandy soil, in two further years of experiments. N saving in these experiments was between 8 and 88 (average 44) kg N ha-1. In both sets of experiments, yields with the sidedress system were generally at the same level as yields obtained with recommended Nrates (basal N only). We conclude that the reflectance-based sidedressN system allows saving of N while maintaining yield",
keywords = "nitrogen status, fertilizer nitrogen, light reflectance, chlorophyll meter, vegetation index, management, soil, sensor, corn, recommendations",
author = "{van Evert}, F.K. and R. Booij and J.N. Jukema and {ten Berge}, H.F.M. and D. Uenk and E.J.J. Meurs and {van Geel}, W.C.A. and K.H. Wijnholds and J.J. Slabbekoorn",
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journal = "European Journal of Agronomy",
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Using crop reflectance to determine sidedress N rate in potato saves N and maintains yield. / van Evert, F.K.; Booij, R.; Jukema, J.N.; ten Berge, H.F.M.; Uenk, D.; Meurs, E.J.J.; van Geel, W.C.A.; Wijnholds, K.H.; Slabbekoorn, J.J.

In: European Journal of Agronomy, Vol. 43, 2012, p. 58-67.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Using crop reflectance to determine sidedress N rate in potato saves N and maintains yield

AU - van Evert, F.K.

AU - Booij, R.

AU - Jukema, J.N.

AU - ten Berge, H.F.M.

AU - Uenk, D.

AU - Meurs, E.J.J.

AU - van Geel, W.C.A.

AU - Wijnholds, K.H.

AU - Slabbekoorn, J.J.

PY - 2012

Y1 - 2012

N2 - A low basal N application combined with in-season adjustment of the sidedressNrate has been proposed as a means to saveN in growing potato (Solanum tuberosum L.). We hypothesize that a measurement of canopy reflectance provides information which can be used to adjust sidedressNrate. The objective of our work was to develop and test a canopy reflectance-based Nsidedress system for potato in humid climates. In four years of experiments with ware potato on a sandy soil it was determined that the reflectance index WDVI correlates well with N uptake, that sidedressN should be applied at around the time of canopy closing, and that the sidedressNrate should be calculated as the difference between a (fixed) desired N uptake and a reflectance-based measurement of N uptake. The calculated N saving in these experiments was between 10 and 109 (average 56) kg N ha-1. The reflectance-based Nsidedress system was tested at an additional two locations, with ware potatoes on a loamy soil and with starch potatoes on a sandy soil, in two further years of experiments. N saving in these experiments was between 8 and 88 (average 44) kg N ha-1. In both sets of experiments, yields with the sidedress system were generally at the same level as yields obtained with recommended Nrates (basal N only). We conclude that the reflectance-based sidedressN system allows saving of N while maintaining yield

AB - A low basal N application combined with in-season adjustment of the sidedressNrate has been proposed as a means to saveN in growing potato (Solanum tuberosum L.). We hypothesize that a measurement of canopy reflectance provides information which can be used to adjust sidedressNrate. The objective of our work was to develop and test a canopy reflectance-based Nsidedress system for potato in humid climates. In four years of experiments with ware potato on a sandy soil it was determined that the reflectance index WDVI correlates well with N uptake, that sidedressN should be applied at around the time of canopy closing, and that the sidedressNrate should be calculated as the difference between a (fixed) desired N uptake and a reflectance-based measurement of N uptake. The calculated N saving in these experiments was between 10 and 109 (average 56) kg N ha-1. The reflectance-based Nsidedress system was tested at an additional two locations, with ware potatoes on a loamy soil and with starch potatoes on a sandy soil, in two further years of experiments. N saving in these experiments was between 8 and 88 (average 44) kg N ha-1. In both sets of experiments, yields with the sidedress system were generally at the same level as yields obtained with recommended Nrates (basal N only). We conclude that the reflectance-based sidedressN system allows saving of N while maintaining yield

KW - nitrogen status

KW - fertilizer nitrogen

KW - light reflectance

KW - chlorophyll meter

KW - vegetation index

KW - management

KW - soil

KW - sensor

KW - corn

KW - recommendations

U2 - 10.1016/j.eja.2012.05.005

DO - 10.1016/j.eja.2012.05.005

M3 - Article

VL - 43

SP - 58

EP - 67

JO - European Journal of Agronomy

JF - European Journal of Agronomy

SN - 1161-0301

ER -