Fate of fertilizer 15N in intensive ridge cultivation with plastic mulching under a monsoon climate

Janine Kettering, Marianne Ruidisch, Camila Gaviria, Yong Sik Ok, Yakov Kuzyakov

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Reducing nitrogen (N) leaching to groundwater requires an improved understanding of the effect of microtopography on N fate. Because of the heterogeneity between positions, ridge tilled fields, frequently used in intensive agriculture, should be treated as two distinct management units. In this study, we measured N dynamics in plastic-mulched ridges and bare furrows with the goal of developing more sustainable agricultural practices with optimal gains, namely crop production versus limited impacts on water quality. We investigated: (1) biomass production; (2) crop N uptake; (3) N retention in soil; and (4) N leaching using 15N fertilizer in a radish crop. Broadcast mineral N fertilizer application prior to planting resulted in high total leaching losses (of up to 390 N kg ha-1). The application of plastic mulch in combination with local fertilizer management did not help to reduce N leaching. At all fertilizer N rates, the mean NO3- concentrations in seepage water were found to be above the WHO drinking water standard of 50 mg NO3- l-1. To reduce NO3- leaching, we recommend: (1) decreasing the fertilizer N rates to a maximum of 150 kg N ha-1; (2) applying fertilizer N in 3-4 split applications according to the plant's N needs; (3) applying fertilizer N to the ridges (after their formation) to avoid losses from the furrows; and (4) increasing the soil organic matter content to enhance the water and nutrient retention by covering the furrows with plant residues.

Original languageEnglish
Pages (from-to)57-72
Number of pages16
JournalNutrient Cycling in Agroecosystems
Volume95
Issue number1
DOIs
Publication statusPublished - 2013 Jan 14
Externally publishedYes

Fingerprint

mulching
leaching
monsoon
nitrogen fertilizers
plastics
plastic
fertilizer
fertilizers
climate
furrows
split application
nutrient retention
microrelief
intensive farming
plant residues
seepage
crops
radishes
intensive agriculture
crop

Keywords

  • Intensive crop management
  • N leaching
  • N retention
  • N use efficiency
  • Sandy soils
  • Spatial heterogeneity
  • Stable isotope
  • Suction lysimeter

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Soil Science

Cite this

Fate of fertilizer 15N in intensive ridge cultivation with plastic mulching under a monsoon climate. / Kettering, Janine; Ruidisch, Marianne; Gaviria, Camila; Ok, Yong Sik; Kuzyakov, Yakov.

In: Nutrient Cycling in Agroecosystems, Vol. 95, No. 1, 14.01.2013, p. 57-72.

Research output: Contribution to journalArticle

Kettering, Janine ; Ruidisch, Marianne ; Gaviria, Camila ; Ok, Yong Sik ; Kuzyakov, Yakov. / Fate of fertilizer 15N in intensive ridge cultivation with plastic mulching under a monsoon climate. In: Nutrient Cycling in Agroecosystems. 2013 ; Vol. 95, No. 1. pp. 57-72.
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