PJB-2018-1080
Ramie（Boehmeria nivea L.）adapts to nitrogen application through osmotic adjustment
Gang Gao
Abstract
Ramie (Boehmeria nivea L.) is one of the most important fiber crops and biomass materials. However, previous studies showed that ramie presented a very low nitrogen agronomy efficiency (NAE, 23.2%-27.8%) in traditional farming, and the nitrogen fertilizer was applied excessively in ramie field. In order to improve ramie production through osmoregulation, our current study investigated the role of nitrogen application and osmotic adjustment (OA) in improving the growth and yield in two varieties of ramie (H2000-03 and Ceheng Jiama) with distinct NUE grown under 6 different N rates (N0, N6, N9, N12 and N15; 0, 6, 9, 12 and 15 mmol/L N, respectively). The results showed that ramie adapted to different nitrogen rates through OA and significant differences of osmolyte between varieties only presented at the particular growth stage. Obvious inflexions of yield, osmolyte content (proline, soluble protein, soluble sugar and MDA), nitrogen sensitive index (NSI) and comprehensive evaluation (D) in both varieties were observed. Our results recommended that the overall lifting of OA at a lower N level and at proper growth stage would a reasonable approach for improving ramie NUE.
To Cite this article:
Download
