地膜覆盖与施肥对秸秆碳氮在土壤中固存的影响

王淑颖(

),李小红,程娜,付时丰,李双异,孙良杰,安婷婷(

),汪景宽

Effects of Plastic Film Mulching and Fertilization on the Sequestration of Carbon and Nitrogen from Straw in Soil

WANG ShuYing(

),LI XiaoHong,CHENG Na,FU ShiFeng,LI ShuangYi,SUN LiangJie,AN TingTing(

),WANG JingKuan

图1. 不同覆膜和施肥处理土壤添加¹³C¹⁵N双标记秸秆土壤有机碳δ¹³C值（a）和全氮δ¹⁵N值（b）
CK、N₄和M₂N₂分别代表不施肥、单施氮肥和有机肥配施氮肥;不同大写字母表示培养第30天不同处理之间的差异显著（P<0.05）;不同小写字母表示培养第150天不同处理之间的差异显著（P<0.05）;*表示相同处理不同培养时间之间的差异显著（P<0.05）。下同

Fig. 1. δ¹³C value of total organic carbon (a) and δ¹⁵N value of total nitrogen (b) in soil added with ¹³C¹⁵N-labeled straw under different mulching and fertilization treatments
CK, N₄and M₂N₂ denote no fertilizer, chemical nitrogen fertilizer, and organic manure combined with chemical nitrogen fertilizer, respectively. Different capital letters show significant differences (P<0.05) among different treatments on the 30^thday of incubation; Different lowercase letters show significant differences (P<0.05) among different treatments on the 150^thday of incubation; *Show the significant differences (P<0.05) between different incubation time in the same treatment. The same as below