期刊论文

中文

贵州农业科学

1001-3601

2014

4

136-140

10.3969/j.issn.1001-3601.2014.04.035

国家科技支撑计划项目“南方丘陵山地农业面源污染防控技术集成与示范”（2012BAD15B04）； 湖南省科技计划项目“基于环境效益评价的旱地减污高产型施氮技术研究”（2013NK3046）；

本校为第一机构

探明控释尿素在夏玉米田间土壤中氨挥发损失的规律，为合理施肥、提高氮素利用率提供依据，采用田间定位试验和氨挥发动态密闭室监测方法研究控释尿素对夏玉米田间土壤氨挥发的影响。结果表明：1）夏玉米各时期施用控释尿素各处理的土壤氨挥发通量、氨挥发累积损失量、损失率及时段氨挥发通量均显著低于施用普通尿素处理，且氨挥发累积损失量、损失率及时段氨挥发通量随总氮素施用量的降低而减少，即普通尿素＞常量控释尿素＞控释尿素减氮10％＞控释尿素减氮20％＞控释尿素减氮30％。2）夏玉米施用控释尿素处理的土壤氨挥发高峰期比施普通尿素处理推迟2～3 d，且气温、降水、灌溉、施肥方式等因...

The effect of controlled-release urea on ammonia volatilization of summer maize soil was studied by field location test and dynamic closed chamber monitoring method to know ammonia volatilization loss of the soil applied with controlled-release urea in summer maize field and provide the basis for rational application and nitrogen utilization in summer maize production.The results showed that:1 ) the soil ammonia volatilization flux, accumulation loss amount and loss ratio of ammonia volatilization and time interval ammonia volatilization flux of the soil applied with controlled-release urea we...