摘要
为了探索减少江淮丘陵区稻田氨挥发损失和提高其氮肥利用率的途径,采用密闭室连续抽取法,研究了不同氮肥管理模式对稻田氨挥发损失特征和氮肥利用率的影响。结果表明,整个稻季,氨挥发损失率以分蘖肥期最高,基肥期次之,穗肥期最低。较常规施肥(CN),缓释尿素与普通尿素配施(CRU)处理稻季氨挥发损失总量和损失率分别降低了26.23%和4.52%,氮肥利用率提高了6.07%;各施肥处理的氨挥发量与同期田面水中的铵态氮浓度呈线性正相关。综合分析,缓释尿素与普通尿素配施既能减少氨挥发损失,又能获得较高的经济效益,在江淮丘陵区具有推广应用价值。
Ammonia volatilization was a major path of nitrogen losses in Paddy field.In order to evaluate the effects of different nitrogen schemes on ammonia volatilization and nitrogen use efficiency from paddy field in Jianghuai hilly region,a field experiment by the closed airflow chamber method was conducted.The results showed that the ammonia volatilization loss ratio was the highest at tillering stage,followed by basal stage,finally heading stage.Compared with the conventional fertilization,the ammonia volatilization loss amount and ratio under the application of slow-release urea combined with common urea were decreased by 26.23%and 4.52%,respectively,while the nitrogen use efficiency increased by 6.07%.Ammonia volatilization loss was positive correlated with ammonium nitrogen concentration on the surface water.Therefore,the application of slow-release urea combined with common urea can not only reduce ammonia volatilization loss,but also obtain higher economic benefit,which is suitable to be recommended in Jianghuai hilly region.
出处
《水土保持学报》
CSCD
北大核心
2017年第4期285-288,331,共5页
Journal of Soil and Water Conservation
基金
国家重点研发计划项目"长江中下游水稻化肥农药减施增效技术集成研究与示范"(2016YFD0200800)
安徽省农科院科技创新团队项目"水旱轮作最佳养分管理"(13C1008)
院长青年创新基金项目"江淮丘陵稻区氮肥的氨挥发及其影响因素研究"(15B1018)
关键词
江淮丘陵
稻田
缓释尿素
氨挥发
Jianghuai hilly region
paddy field
slow-release urea
ammonia volatilization