%0 Journal Article
%T Effects of irrigation and nitrogen application on ammonia volatilization in solar greenhouse soils in winter-spring cucumber cultivation<br>不同水氮条件对日光温室冬春茬黄瓜栽培氨挥发的影响
%A LI Yin-Kun
%A MEI Xu-Rong
%A WU Xue-Ping
%A HAO Wei-Ping
%A CHEN Min-Peng
%A XIA Xu
%A LI Hao-Ru
%A <br>李银坤
%A 梅旭荣
%A 武雪萍
%A 郝卫平
%A 陈敏鹏
%A 夏 旭
%A 李昊儒
%J 中国生态农业学报
%D 2012
%I 
%X Ammonia volatilization characteristics in fertilized and non-fertilized belts of greenhouse soils were investigated under different irrigation and nitrogen application treatments during winter-spring cucumber cultivation via the venting method. Also differences in ammonia volatilization among water-saving irrigation, reduced nitrogen treatment and traditional water/nitrogen treatments were analyzed and discussed. From the study, peak ammonia volatilization rate was on 7 days after basal fertilization in the solar greenhouse soil. Compared with traditional nitrogen treatment, the peak value for 25%-reduction in nitrogen fertilization dropped by 18.2%~34.3%. While peak ammonia volatilization rate was on the first day in the fertilization belt, it was on the fifth day in the non-fertilization belt after topdressing. Also compared with traditional treatments, the peak value for 25%-reduction in nitrogen fertilization also dropped by 12.3%~37.2% and that for water-saving irrigation treatment increased by 3.9%~47.0%. Ammonia volatilization and loss in the fertilization belt of greenhouse soils mainly occurred during cucumber blooming and initial fruiting periods, which were respectively 1.07~1.50 and 1.06~1.27 times those of the non-fertilization belt. No significant differences in ammonia volatilization and loss existed between fertilization and non-fertilization belts of greenhouse soils during cucumber full-fruit period and end-fruit periods. Ammonia volatilization rate increased with (0~10 cm) soil ammonium nitrogen content and improvement in (5 cm) soil temperature. However, a negative correlation existed between (0~10 cm) soil water content and ammonia volatilization rate. Cumulative ammonia volatilization was 11.4~26.6 kg·hm-2 during the entire cucumber growth season. Compared with traditional nitrogen and irrigation treatments, cumulative ammonia volatilization in the 25%-reduction in nitrogen fertilization dropped by 20.8%~22.2%. Also water-saving irrigation treatments concurrently improved cumulative ammonia volatilization by 0~4.51%. The analysis showed that appropriate reductions in nitrogen fertilization significantly limited ammonia volatilization and enhanced irrigation/nitrogen fertilizer efficiency in solar greenhouse soils in Hebei Province. While water-saving also significantly improved irrigation/nitrogen fertilizer efficiency, it failed to significantly reduce ammonia volatilization. Irrigation water-use efficiency of the 25%-reduction in nitrogen fertilization improved by 2.6%~5.9% over traditional nitrogen treatment. Compared with traditional irrigation, agronomic efficiency of nitrogen in water-saving irrigation increased by 13.9%~75.0%.
%K Solar greenhouse
%K Winter-spring cucumber
%K Irrigation
%K Nitrogen fertilization
%K Ammonia volatilization<br>日光温室
%K 冬春季黄瓜
%K 灌溉
%K 氮肥
%K 氨挥发
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=CE7C7243D601030272145DE4F8DA499B&yid=99E9153A83D4CB11&vid=A04140E723CB732E&iid=708DD6B15D2464E8&sid=E645E14F118D0796&eid=8EA44A8F6C7F424F&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=0&reference_num=0