浙江农业学报 ›› 2022, Vol. 34 ›› Issue (12): 2689-2699.DOI: 10.3969/j.issn.1004-1524.2022.12.12

• 环境科学 • 上一篇    下一篇

秸秆直接还田与炭化还田对热带土壤-水稻系统氨挥发的影响

林智文1,2(), 张鹏1,2, 吴天昊2,3, 单颖2, 邹刚华2, 赵凤亮2,*(), 郑桂萍1,*()   

  1. 1.黑龙江八一农垦大学 农学院,黑龙江 大庆 163319
    2.中国热带农业科学院 环境与植物保护研究所,海南 海口 571101
    3.贵州大学 精细化工研究开发中心,贵州 贵阳 550025
  • 收稿日期:2022-01-12 出版日期:2022-12-25 发布日期:2022-12-26
  • 通讯作者: 赵凤亮,郑桂萍
  • 作者简介:郑桂萍,E-mail: byndzgp@163.com
    *赵凤亮,E-mail: zfl7409@163.com;
    林智文(1995—),男,四川成都人,硕士研究生,主要从事土壤氮素循环研究。E-mail:1129042477@qq.com
  • 基金资助:
    海南省自然科学基金(321RC625)

Effects of straw and straw-derived biochar returning on ammonia volatilization in tropical soil-rice system

LIN Zhiwen1,2(), ZHANG Peng1,2, WU Tianhao2,3, SHAN Ying2, ZOU Ganghua2, ZHAO Fengliang2,*(), ZHENG Guiping1,*()   

  1. 1. College of Agriculture,Heilongjiang Bayi Agricultural University,Daqing 163319, Heilongjiang, China
    2. Institute of Environmental and Plant Protection, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
    3. Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang 550025, China
  • Received:2022-01-12 Online:2022-12-25 Published:2022-12-26
  • Contact: ZHAO Fengliang,ZHENG Guiping

摘要:

氨挥发是稻田氮损失的主要形式之一。本研究采用温室土柱试验方法,设置不施氮肥(0N)、秸秆还田 (ST)、生物炭(秸秆炭化)还田(BI)、常规施肥(CF)、秸秆还田配施氮肥(NST)、生物炭还田配施氮肥(NBI)6个处理,研究等量氮素投入条件下秸秆还田及其炭化还田对热带土壤-水稻系统氨挥发排放的影响。结果表明,与CF处理相比,NST处理在分蘖期显著(P<0.05)降低了田面水的pH值,提高了田面水的NH4+-N含量;NBI处理显著(P<0.05)提高了水稻成熟期的土壤pH值和土壤NH4+-N含量,降低了土壤NO3--N含量。总的来看,NBI处理在试验条件下对土壤氨挥发具有较好的抑制作用,氨累积挥发量较CF处理显著(P<0.05)降低28.9%。

关键词: 热带土壤, 氨挥发, 水稻秸秆, 生物炭

Abstract:

Ammonia volatilization is one of the main forms of nitrogen loss in paddy fields. In the present study, soil column experiment was adopted with 6 treatments, namely, no nitrogen fertilizer (0N), straw returning (ST), straw-derived biochar returning (BI), conventional fertilization (CF), straw returning with nitrogen fertilizer (NST), straw-derived biochar returning with nitrogen fertilizer (NBI), to evaluate the effects of straw and straw-derived biochar returning on ammonia volatilization in the tropical soil-rice system. The results showed that, compared with the CK treatment, NST treatment significantly (P<0.05) reduced the pH, yet increased the NH4+-N content of surface water at the tillering stage. NBI treatment significantly (P<0.05) elevated the pH and NH4+-N content of soil, yet decreased soil NO3--N content as compared with the CF treatment. Overall, NBI treatment could inhibit ammonia volatilization under the experiment conditions, as its cumulative ammonia volatilization was significantly (P<0.05) decreased by 28.9% than that of CF treatment.

Key words: tropical soil, ammonia volatilization, rice straw, biochar

中图分类号: