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Ammonia volatilization and nitrogen runoff losses from moso bamboo forests after different fertilization practices
- Zhao, Jiancheng, Su, Wenhui, Fan, Shaohui, Cai, Chunju, Su, Haoran, Zeng, Xianli
- Canadian journal of forest research 2019 v.49 no.3 pp. 213-220
- Phyllostachys edulis, ammonia, ammonium nitrogen, application methods, bamboos, field experimentation, forests, furrows, nitrate nitrogen, nitrogen, runoff, volatilization
- Moso bamboo (Phyllostachys edulis (Carrière) J. Houz.) is a major giant bamboo species. Unreasonable fertilization and nitrogen (N) loss is a serious problem. A field experiment was conducted to determine the effects of application methods (furrow and hole) and depths (0–20 and 20–40 cm) on ammonia (NH₃) volatilization and N runoff losses from June to December, 2015. Ammonia volatilization was detected as a single peak curve after fertilization. Three weeks later, fluxes of all fertilization treatments were similar to those of the control and remained stable. After the experiment, the cumulative NH₃ volatilization was 17.2–21.4 kg·ha⁻¹. Approximately 90% of NH₃ volatilization occurred within the first two weeks. The NH₄⁺-N loss was higher than the NO₃⁻-N loss, and the total runoff losses were relatively low. For the same application method, with the increase of application depth, the NH₃ volatilization and N runoff losses reduced; for the same application depth, the NH₃ volatilization and N runoff losses after furrow application were lower than those after hole application. Therefore, the deep and furrow application methods were effective in reducing N loss through NH₃ volatilization and runoff. In the present study, furrow application at a 20–40 cm depth has been appropriate for field practice.