生物炭连续施用对农田土壤氮转化微生物及N2O排放的影响
董成,陈智勇,谢迎新,张阳阳,缑培欣,杨家蘅,马冬云,王晨阳,郭天财
Effects of Successive Biochar Addition to Soil on Nitrogen Functional Microorganisms and Nitrous Oxide Emission
DONG Cheng,CHEN ZhiYong,XIE YingXin,ZHANG YangYang,GOU PeiXin,YANG JiaHeng,MA DongYun,WANG ChenYang,GUO TianCai

图3. 不同生物炭处理土壤耕层（0—20 cm）无机氮（Nmin）含量动态变化
实线箭头所指代表施肥时期,虚线箭头所指代表灌溉或降雨时期;同一取样时期同列不同小写字母表示不同处理在P<0.05水平上差异显著。下同

Fig. 3. Dynamic changes of Nmin content of topsoil (0-20 cm) in different biochar treatments
The arrow of solid line represents fertilization, and the arrow of dotted line represents irrigation or rainfall. Different lowercase letters within a column in the same sampling date indicate significantly differences at P<0.05 among different treatments. The same as below