中考资讯Ammonia Volatilization Loss from Surface-Broadcast Urea: Comparison of Vented- and Clod-Chamber Methods and Loss in Winter Wheat–
superme怎么读>job1Summer Maize Rotation in North China Plain
eastboys期刊名称： Communications in Soil Science & Plant Analysis
职称英语成绩查询2015作者： Wang, Zhao-Hui,Liu, Xue-Jun,Ju, Xiao-Tang,Zhang, Fu-Suo,Malhi, S. S.
英语词典软件
艾薇儿结婚背景音乐年份： 2004年
期号： 第19-20期
关键词： ammonia;application rates;broadcasting;calcareous soils;loss from
soil;maize;methodology;rotations;soil types;top
dressings;urea;volatilization;wheat;winter wheat
tuns
metaver摘要：Ammonia (NH3) volatilization is an important pathway for fertilizer nitrogen (N) loss from soil and is also a major source of air and environmental pollution. On calcareous soils in North China Plain, application of N fertilizer in the form of urea under intensive cropping with winter wheat (Triticum aestvum L.) and summer maize (Zea mays L.) rotation can lead to rious NH3 loss. The objective of this study was to compare a modified vented-chamber method with the traditional clod-chamber method to measure NH3 volatilization loss under laboratory and field conditions and to determine in situ NH3 volatilization in the field from surface broadcast urea at 0, 120, 240, and 360kgNha1 rates to each crop (for winter wheat, one-half at sowing and the other half at the elongation growth stage; for summer maize, one-half at the 3-leaf
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