秸秆还田和氮肥用量对冬小麦产量和氮素利用的影响

王新媛,赵思达,郑险峰,王朝辉,何刚

Effects of Straw Returning and Nitrogen Application Rate on Grain Yield and Nitrogen Utilization of Winter Wheat

WANG XinYuan,ZHAO SiDa,ZHENG XianFeng,WANG ZhaoHui,HE Gang

图4 不同氮肥用量条件下秸秆还田对0—200 cm土层土壤硝态氮剖面分布的影响 误差棒表示LSD值,若秸秆还田与不还田处理间的差异显著,相应土层则有误差棒,否则无误差棒

Fig. 4 The effect of straw returning on the distribution of soil NO3--N residue in 0-200 cm soil layer under different N application rates Error bars denote the LSD at P≤0.05. If there is an error bar in a certain soil layer, the difference between straw returning and control is significant