摘要
以动物源的猪炭和植物源的竹炭为试验材料,通过田间小区试验,研究生物质炭的种类(竹炭和猪炭)、施用方式(一次施用和分批施用)对空心菜-小青菜轮作土壤N_2O和CO_2排放的影响,结果表明:空心菜季土壤N_2O和CO_2排放显著高于小青菜季,土壤N_2O和CO_2排放与土壤pH、温度呈显著相关(p<0.01).与不施炭对照相比,竹炭处理可使两季空心菜和小青菜土壤N_2O累积排放量减少16.9%~39.9%,同时CO_2排放量减少9.2%~15.7%,且一次施用处理优于分批施用.猪炭处理在土壤N_2O减排效果上没有竹炭显著,且一次性施用猪炭处理明显增加了两茬空心菜土壤CO_2排放量,与对照相比,分别增加了13.3%和12.9%.与猪炭相比,一次性施用20 t·hm^(-2)竹炭处理在抑制土壤N_2O和CO_2排放上效果更佳.
A field experiment was conducted to evaluate the effects of pig-derived biochar （PB） and bamboo-derived biochar （BB） on soil N2O and CO2 emissions in an Ipomoea aquatica Forsk and Brassica chinensis rotation system in greenhouse vegetable in South China. The treatments included control （ no biochar） and one-off application of 20 t ·hm-2 of two biochars （ 20-0-PB and 20-0-BB） prior to the first Ipomoea aquatica Forsk crop. The results showed that the soil N2O and CO2 emissions in the lpomoea aquatica Forsk crop season were higher than Brassica chinensis crop season, and the emission flux was significantly （p 〈 0.01 ） correlated with soil pH or temperatures. Compared with the control, the bamboo biochar treatments decreased the soil N2O emission flux by 16.9% - 39.9% in the whole rotation system, and also decreased the soil CO2 emission flux by 9.2% -15.7%. In addition, the 20-0-BB treatment was more effective than the 10-10-BB treatment. Pig biochar treatments were not so effective in decreasing soil N20 emission than bamboo biochar. Compared with the control, the 20-0-PB treatment significantly （p〈0.05） increased soil CO2 emissions flux in two harvest lpomoea aquatica Forsk crop season by 13.3% and 12.9%, respectively. In conclusion, one-off application of the bamboo biochar at 20 t· hm-2 was more effective than PB treatments in decreasing soil N2O and CO2 emissions.
出处
《环境科学学报》
CAS
CSCD
北大核心
2017年第4期1547-1554,共8页
Acta Scientiae Circumstantiae
基金
国家自然科学基金(No.41401338
21577131)
东莞市引进创新科研团队项目(No.2014607101003)~~
关键词
猪炭
竹炭
设施菜地
温室气体
pig biochar
bamboo biochar
greenhouse vegetable
greenhouse gas
