The results showed: The soil organic matter and total nitrogen contents in no fertilizer application treatment was the lowest among all treatments;
结果表明，长期无肥处理土壤有机质含量、全氮含量最低；长期施用氮肥、氮磷肥、有机肥处理土壤有机质含量、全氮含量居中；
The key techniques were to make sure the proper basic seedling no. , to utilize tillers reasonably and to improve fertilizer application.
指出优化小麦群体质量的关键技术途径是科学确定适宜基本苗数、合理利用分蘖和改进肥料运筹。
Effect of different basal-dressing application methods and different amounts of fertilizer on NO emission from the soil grown with winter wheat was studied with the technique of static chamber.
用静态箱法对冬小麦不同基肥施用方式(表施、深施)和不同施用量下的土壤NO排放通量进行了研究，结果表明：肥料在土壤中的位置对NO排放通量的影响非常显著。
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