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- Title
Effects of nitrogen deposition on growth and phosphate efficiency of Schima superba of different provenances grown in phosphorus-barren soil.
- Authors
Zhang, Rui; Zhou, ZhiChun; Luo, WenJian; Wang, Yi; Feng, ZhongPing
- Abstract
Aims: We determined whether nitrogen (N) deposition on phosphorus (P)-limited soil could increase Schima superba growth or alter root formation or P efficiency. The effects of N deposition on S. superba were also used to investigate the N/P requirements of plants of different provenances. Methods: One-year-old S. superba seedlings from eight geographic areas were grown in P-limited soil and treated with N (0, 50, 100, and 200 -kg N ha year; i.e., control, N50, N100, or N200, respectively). Seedling growth, root development, phosphorus acquisition efficiency (PAE), and phosphorus utilization efficiency (PUE) were measured. Results: S. superba responded positively to N supplementation. Seedling growth and dry biomass were highest with N100 treatment and lowest with N200. Root biomass and acquisition of soil P were greatest with N100. Significant differences were observed among plants of different geographical provenances. PAE and PUE had a strong relationship with root growth in plants subjected to N100 treatment. Conclusion: A threshold for N and P requirements related to different genetic conditions and soil nutrients may exist for S. superba. Root growth and PAE can be divided into three categories based on soil nitrate levels. Nutrients were found to control root morphology and to enhance aboveground differences.
- Subjects
THEACEAE; NITROGEN in soils; PHOSPHORUS in soils; PLANT growth; ROOT formation; PROVENANCES of cultivated plants
- Publication
Plant & Soil, 2013, Vol 370, Issue 1/2, p435
- ISSN
0032-079X
- Publication type
Article
- DOI
10.1007/s11104-013-1644-x