Factors affecting foliar nitrogen uptake by creeping bentgrass

Research output: Contribution to journalComment/debatepeer-review

Abstract

Turfgrass managers frequently apply N as a foliar spray when low application rates are desired. This practice is believed to promote foliar N uptake that benefits turf; however, very little information is available concerning the quantity of N absorbed by turfgrass foliage or the effect of various spray parameters on foliar N uptake under field conditions. This research was conducted to evaluate fertilizer N uptake efficiency of foliarly applied 15N to creeping bentgrass [Agrostis stolonifera var. L. palustris (Huds.) Farw. 'Pennlinks'] under field conditions. The effects of spray volume, N carrier, adjuvant addition, and tank mixing with commonly applied turf care products (e.g. chlorothalonil) on foliar N uptake were conducted to evaluate foliar uptake of fertilizer 15N by creeping bentgrass. From 6 to 34% of foliar-applied N was taken up mostly within 2 h and completely by 4 to 6 h after fertilizer application. Uptake efficiency increased significantly when spray volume was decreased but was unaffected by N carrier, adjuvant addition, or tank mixing.

Original languageEnglish (US)
Pages (from-to)1778-1783
Number of pages6
JournalCrop Science
Volume53
Issue number4
DOIs
StatePublished - Jul 1 2013

ASJC Scopus subject areas

  • Agronomy and Crop Science

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