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应用生态学报 ›› 2010, Vol. 21 ›› Issue (2): 373-378.

• 研究报告 • 上一篇    下一篇

不同耕作方式和秸秆还田对麦田土壤有机碳含量的影响

田慎重;宁堂原;王瑜;李洪杰;仲惟磊;李增嘉**   

  1. 山东农业大学农学院作物生物学国家重点实验室, 山东泰安 271018
  • 出版日期:2010-02-20 发布日期:2010-02-20

Effects of different tillage methods and straw-returning on soil organic carbon content in a winter wheat field.

TIAN Shen-zhong;NING Tang-yuan;WANG Yu;LI Hong-jie;ZHONG Wei-lei;LI Zeng-jia   

  1. State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Tai’an 271018, Shandong, China
  • Online:2010-02-20 Published:2010-02-20

摘要: 通过两个生长季试验,研究了不同耕作方式和秸秆还田及其交互效应对小麦全生育期0~20 cm土壤有机碳含量的影响.结果表明:小麦不同生育时期0~20 cm土层有机碳含量呈明显的动态变化;秸秆还田各处理的有机碳含量都高于无秸秆还田处理;保护性耕作措施土壤有机碳增加量显著高于传统翻耕.除传统翻耕处理外,各处理0~10 cm土层的有机碳含量都高于10~20 cm土层,秸秆还田各处理0~10 cm土层有机碳含量表现为深松(PS)>旋耕(PR)>免耕(PZ)>耙耕(PH)>传统翻耕(PC),而10~20 cm土层表现为传统翻耕(PC)>深松(PS)>旋耕(PR)>耙耕(PH)>免耕(PZ),说明保护性耕作措施能提高0~10 cm土层的有机碳含量.多因素方差分析表明:耕作因素、秸秆因素和两者交互效应在不同生育期对0~20 cm土层的有机碳含量都有显著影响.

关键词: 保护性耕作, 秸秆还田, 土壤有机碳, 冬小麦, 土壤胶体磷, 赋存, 迁移, 分析技术

Abstract: A two growth seasons experiment was conducted to study the effects of different tillage methods, straw-returning, and their interaction on the dynamic change of organic carbon content in 0-20 cm soil layer during the whole growth period of winter wheat. An obvious change was observed in the soil organic carbon content. Treatments with straw-returning had higher soil organic carbon content than treatments with no straw-returning, and conservation tillage induced higher soil organic carbon content than conventional tillage. In all treatments except conventional tillage, the organic carbon content in 0-10 cm soil layer was higher than that in 10-20 cm soil layer. In treatments with straw-returning, the organic carbon content in 0-10 cm soil layer decreased in  order of deep soiling (PS)>rotary tillage (PR)>no tillage (PZ)>normal ploughing (PH)>conventional tillage (PC), while that in 10-20 cm soil layer was PC>PS>PR>PH>PZ, suggesting that conservation tillage could improve the organic carbon content in 0-10 cm soil layer. Multi factor variance analysis showed that tillage method, straw-returning, and their interaction had significant effects on the organic carbon content in 0-20 cm soil layer at various growth stages of winter wheat.

Key words: conservation tillage, straw-returning, soil organic carbon, winter wheat, soil colloidal phosphorus, speciation, transference, analysis technology.