The pot experiment was carried out to study effects of nitrogen fertilizer on winter wheat yield and its component under different status of soil moisture.

通过盆栽试验研究了不同水分状况下追施氮肥对冬小麦产量及其构成因素的影响。

In conclusion, it was more efficient that combined application of pretreated straw with inorganic fertilizer could improve soil N supply modes and increase wheat yield and nitrogen use rate.

可见处理秸秆配施尿素能够显著改善土壤的供氮状况，促进小麦对氮素的吸收，增加小麦产量，提高化学肥料氮的利用率。

With CO2 effects, wheat yield has extensive increase.

如果考虑CO2，增产效果更加明显。

The most important limiting factor for wheat yield in this cropping system is late planting.

该种植方式中最重要的小麦限产因素是迟播.

Results showed that rational use of chemical fertilizer not only increased wheat yield, but also increased N, P and K content in wheat to some extent.

结果表明，合理施用化肥不但增产幅度大，还在一定程度上增加了小麦N、P、K养分浓度。