研究报告
陆扣萍,郭茜,胡国涛,杨兴,车磊,刘兴元,王海龙.竹炭和猪炭对空心菜-小青菜轮作土壤N2O和CO2排放的影响[J].环境科学学报,2017,37(4):1547-1554
竹炭和猪炭对空心菜-小青菜轮作土壤N2O和CO2排放的影响
- Effects of bamboo and pig biochars on soil N2O and CO2 emissions in Lpomoea aquatica Forsk-Brassica chinensis rotation system
- 基金项目：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）
- 作者
- 单位
- 陆扣萍
- 1. 浙江省土壤污染生物修复重点实验室, 临安 311300;2. 浙江农林大学环境与资源学院, 临安 311300
- 郭茜
- 1. 浙江省土壤污染生物修复重点实验室, 临安 311300;2. 浙江农林大学环境与资源学院, 临安 311300
- 胡国涛
- 1. 浙江省土壤污染生物修复重点实验室, 临安 311300;2. 浙江农林大学环境与资源学院, 临安 311300
- 杨兴
- 浙江省土壤污染生物修复重点实验室, 临安 311300
- 车磊
- 湖州师范学院工学院, 湖州 313000
- 刘兴元
- 广东大众农业科技股份有限公司, 东莞 523169
- 王海龙
- 1. 浙江省土壤污染生物修复重点实验室, 临安 311300;2. 浙江农林大学环境与资源学院, 临安 311300;4. 广东大众农业科技股份有限公司, 东莞 523169
- 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N2O和CO2排放的影响，结果表明：空心菜季土壤N2O和CO2排放显著高于小青菜季，土壤N2O和CO2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N2O累积排放量减少16.9%~39.9%，同时CO2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N2O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CO2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N2O和CO2排放上效果更佳.
- Abstract：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 Ipomoea 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 N2O 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.
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