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绿洲农田土壤团聚体组成及有机碳和全氮分布对秸秆还田方式的响应
引用本文:殷文,郭瑶,陈桂平,冯福学,赵财,于爱忠,樊志龙,胡发龙,柴强.绿洲农田土壤团聚体组成及有机碳和全氮分布对秸秆还田方式的响应[J].干旱地区农业研究,2019,37(3):139-148.
作者姓名:殷文  郭瑶  陈桂平  冯福学  赵财  于爱忠  樊志龙  胡发龙  柴强
作者单位:甘肃省干旱生境作物学重点实验室/甘肃农业大学农学院,甘肃 兰州,730070;甘肃农业大学水利水电工程学院,甘肃 兰州,730070
基金项目:国家公益性行业(农业)科研项目(201503125-3);甘肃农业大学人才专项经费(2017RCZX-02);国家科技支撑计划项目(2015BAD22B04)
摘    要:通过田间定位试验,在甘肃干旱灌区,研究了不同小麦秸秆还田方式(NTSS: 25~30 cm 高茬收割立茬免耕; NTS: 25~30 cm高茬秸秆覆盖免耕; TIS: 25~30 cm 高茬秸秆深翻耕; CT: 传统不留茬深翻耕—对照) 对农田土壤团聚体及有机碳和全氮分布特征的影响,以期为优化试区种植模式与提高农业可持续发展提供依据。结果表明:免耕秸秆还田处理(NTSS、NTS)≥0.25 mm团聚体含量较高,与CT相比,在0~10、10~20、20~30 cm土层分别提高5.4%与12.5%、13.3%与14.1%、11.1%与19.2%,以NTS提高幅度较大。NTSS、NTS提高了0~10、20~30 cm土壤团聚体的平均重量直径,较CT处理分别提高6.7%与11.6%、7.6%与8.1%,以NTS提高效果最明显。NTSS、NTS处理土壤有机碳和全氮含量均高于 CT 处理,在0~10、10~20、20~30 cm土层,有机碳含量分别增大8.1%与13.3%、7.4%与11.4%、7.8%与12.8%;全氮含量分别提高14.6%与17.9%、14.5%与17.9%、16.2%与20.5%,同样,以NTS提高土壤有机碳及全氮程度较大。各级别团聚体中有机碳和全氮含量均随土层深度增加而减小,团聚体中有机碳和全氮含量随团聚体直径减小而增加,NTS处理在各土层各级别团聚体均保持较高的土壤有机碳及全氮含量。因此,前茬小麦25~30 cm秸秆覆盖免耕还田是干旱灌区增强土壤团聚体形成、提高土壤有机碳及全氮含量的适宜栽培措施。

关 键 词:免耕  秸秆还田  团聚体  有机碳  全氮  绿洲农田

Response of composition of soil aggregates and distribution of organic carbon and total nitrogen to straw returning in an oasis area
YIN Wen,GUO Yao,CHEN Gui-ping,FENG Fu-xue,ZHAO Cai,YU Ai-zhong,FAN Zhi-long,HU Fa-long,CHAI Qiang.Response of composition of soil aggregates and distribution of organic carbon and total nitrogen to straw returning in an oasis area[J].Agricultural Research in the Arid Areas,2019,37(3):139-148.
Authors:YIN Wen  GUO Yao  CHEN Gui-ping  FENG Fu-xue  ZHAO Cai  YU Ai-zhong  FAN Zhi-long  HU Fa-long  CHAI Qiang
Institution:Gansu Provincial Key Laboratory of Arid Land Crop Science / College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China,Gansu Provincial Key Laboratory of Arid Land Crop Science / College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China,Gansu Provincial Key Laboratory of Arid Land Crop Science / College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China,College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou Gansu, 730070, China,Gansu Provincial Key Laboratory of Arid Land Crop Science / College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China,Gansu Provincial Key Laboratory of Arid Land Crop Science / College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China,Gansu Provincial Key Laboratory of Arid Land Crop Science / College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China,Gansu Provincial Key Laboratory of Arid Land Crop Science / College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China and Gansu Provincial Key Laboratory of Arid Land Crop Science / College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China
Abstract:
Keywords:no-tillage  straw returning  soil aggregates  organic carbon  total nitrogen  oasis farmland
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