周年秸秆还田对农田土壤固碳及冬小麦-夏玉米产量的影响

李昊昱,孟兆良,庞党伟,陈金,侯永坤,崔海兴,金敏,王振林,李勇

Effect of annual straw return model on soil carbon sequestration and crop yields in winter wheat-summer maize rotation farmland

Hao-Yu LI,Zhao-Liang MENG,Dang-Wei PANG,Jin CHEN,Yong-Kun HOU,Hai-Xing CUI,Min JIN,Zhen-Lin WANG,Yong LI

表1 试验设计

Table 1 Experiment design

代码 Code 处理 Treatment 田间操作 Field operation NS 秸秆双季不还田 No straw incorporation 玉米、小麦秸秆全量移除。 All maize and wheat straws are removed. SS 夏玉米季秸秆还田 Summer maize-season straw incorporation 玉米秸秆全量移除; 小麦秸秆经灭茬机粉碎后(约5~10 cm), 免耕覆盖还田。 Maize straws are removed fully. wheat straws are smashed (5-10 cm) and returned with no-tillage. WS 冬小麦季秸秆还田 Winter wheat-season straw incorporation 玉米秸秆经灭茬机粉碎后(约5~10 cm), 旋耕还田; 小麦秸秆全量移除。 Maize straws are smashed (5-10 cm) and returned with rotary tillage. All wheat straws are removed. DS 秸秆双季还田 Double-season straw incorporation 秸秆经灭茬机粉碎后(约5~10 cm), 玉米秸秆旋耕还田, 小麦秸秆免耕覆盖还田 All straws are smashed (5-10 cm); Maize straw was returned with rotary tillage and wheat straw with no-tillage.