摘要
菜地是大气温室气体的主要排放来源之一。为探究地膜覆盖(NF:不覆膜,F:覆膜)和生物炭施加量(B0:0 t/hm^(2);B20:20 t/hm^(2);B40:40 t/hm^(2))对菜地土壤剖面温室气体的影响,以西南大学试验农田为研究对象,采用扩散箱法原位观测了2020年辣椒—萝卜轮作菜地10、20、30 cm土层的CO_(2)、CH_(4)、N_(2)O体积分数。试验共设6个处理,分别为NFB0、NFB20、NFB40、FB0、FB20、FB40。结果表明:在整个观测期间,菜地土壤剖面的CO_(2)、CH_(4)、N_(2)O体积分数分别为653.55~13059.21、1.10~2.59、0.20~4.76 mL/m^(3)。CO_(2)体积分数随着土壤深度的增加而增加,CH_(4)体积分数随土壤深度的增加而降低,而N_(2)O随土壤深度变化不大。与NF相比,F使萝卜季土壤剖面的CO_(2)和N_(2)O体积分数分别提高了60.62%和47.76%(p<0.01),却使辣椒季和萝卜季土壤剖面的CH_(4)体积分数分别降低了7.84%(p<0.05)和13.74%(p<0.01)。与B0相比,B20处理下的CO_(2)、CH_(4)和N_(2)O体积分数在辣椒季分别提高了21.08%(p<0.01)、9.24%(p<0.05)和37.88%(p<0.05),在萝卜季分别提高了80.42%、17.13%和77.19%(p<0.01);B40处理下的CO_(2)、CH_(4)和N_(2)O体积分数在辣椒季分别提高了64.60%(p<0.01)、10.87%(p<0.05)和75.76%(p<0.05),在萝卜季分别提高了103.63%、8.84%和61.40%(p<0.01)。
Vegetable fields are one of the main sources of greenhouse gas emissions to atmosphere.In order to investigate the impact of plastic film mulching(NF:no film mulching,F:film mulching)and biochar application(B0:0 t·hm^(2),B20:20 t·hm^(2),B40:40 t·hm^(2))on greenhouse gas concentrations in soil profiles of vegetable field,the experimental farmland at Southwest University was used as a research site,and the greenhouse gas concentrations in the 10,20 and 30 cm soil layers of the pepper-radish rotation vegetable field were observed in situ by the diffusion box method in 2020.In this experiment,a total of six treatments were set up,namely NFB0,NFB20,NFB40,FB0,FB20,FB40.The results showed that during the entire observation period,concentrations of soil profile CO_(2),CH_(4),N_(2)O in the vegetable field ranged from 653.55 to 13059.21 mL·m^(3),1.10 to 2.59 mL·m^(3),and 0.20 to 4.76 mL·m^(3),respectively.CO_(2) concentrations increased with soil depth,CH_(4) concentrations decreased with soil depth,and N_(2)O concentrations did not vary much with soil depth.Compared with NF,F increased CO_(2) and N_(2)O concentrations in the radish season by 60.62%and 47.76%(p<0.01),respectively,and decreased CH_(4) concentrations in both pepper and radish seasons by 7.84%(p<0.05)and 13.74%(p<0.01),respectively.Additionally,compared to B0,B20 increased CO_(2),CH_(4) and N_(2)O concentrations in the pepper season by 21.08%(p<0.01),9.24%(p<0.05)and 37.88%(p<0.05),respectively,and in the radish season by 80.42%,17.13% and 77.19%(p<0.01),respectively,while B40 increased the CO_(2),CH_(4) and N_(2)O concentrations in the pepper season by 64.60%(p<0.01),10.87%(p<0.05)and 75.76%(p<0.05),respectively,and in the radish season by 103.63%,8.84%,and 61.40%(p<0.01),respectively.
作者
贺阳剑
江长胜
张文晓
徐诗文
李廷勋
郝庆菊
HE Yangjian;JIANG Changsheng;ZHANG Wenxiao;XU Shiwen;LI Tingxun;HAO Qingju(College of Resources and Environment,Southwest University,Chongqing 400715,China)
出处
《西南大学学报(自然科学版)》
北大核心
2025年第5期141-153,共13页
Journal of Southwest University(Natural Science Edition)
基金
国家自然科学基金项目(41275160,41977186)。
关键词
地膜覆盖
生物炭
菜地
温室气体
土壤剖面
plastic film mulching
biochar
vegetable field
greenhouse gas
soil profile
作者简介
贺阳剑,硕士研究生,主要从事农田生态系统碳氮循环研究;通信作者:郝庆菊,副教授,硕士研究生导师。
