Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: October 4, 2004
Publication Date: November 4, 2004
Citation: Anders, M.M., Olk, D.C., Holzhauer, J. 2004. Effect of rotation, tillage, and fertility on rice yield and nutrient cycling [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, WI.
In 1999 a study was initiated at the University of Arkansas Rice Research and Extension Center, Stuttgart, Arkansas, to measure the impacts of rotation, tillage, and fertility on rice grain yields and soil nutrient cycling. The study consisted of seven rotations, two tillage treatments (conventional-till and no-till), two fertility treatments (standard and enhanced), and two varieties. Data will be presented for only one variety in comparisons of the tillage and fertility treatments and two rotations. Rice yields were significantly affected by rotation and tillage but not by fertility. No treatment significantly affected above-ground plant partitioning to grain, stem, or leaf. Plant uptake of phosphorus and potassium was most affected by rotation and less so by tillage or fertility. Phosphorus concentrations in liquid runoff were higher in the no-till treatment than in the conventional-till treatment. When phosphorus (P) contained in the solid runoff was added the results were opposite. Fertilizer nitrogen (N) uptake was lower in the continuous rice rotation than in rice-soybean for both tillage treatments, and for the continuous rice rotation it was lower in the no-till treatment than in the conventional-till treatment. No-tillage increased soil N uptake for both rotations with higher uptake of total N in the rice-soybean rotation.