HUANG Zhe,QU Shihua,BAI Lan,et al.Effects of Different Straw Mixing Biochar on Nutrient and Enzyme Activity of Saline Soil[J].Research of Soil and Water Conservation,2017,24(04):290-295.
不同秸秆混合生物炭对盐碱土壤养分及酶活性的影响
- Title:
- Effects of Different Straw Mixing Biochar on Nutrient and Enzyme Activity of Saline Soil
- Keywords:
- mixing biochar; saline soil; nutrient; enzyme activit
- 分类号:
- S156
- 摘要:
- 研究不同秸秆混合生物炭对盐碱土壤养分含量和酶活性的影响差异，为盐碱土壤改良和资源的合理利用提供理论参考。以玉米秸秆、玉米芯、芦苇分别和剩余活性污泥混合在450℃裂解得到的混合生物炭为添加材料，以内蒙古盐碱土壤为供试土壤，研究不同混合生物炭添加对盐碱土壤pH值、阳离子交换能力、养分含量及土壤脲酶活性、蔗糖酶活性、过氧化氢酶活性的影响。结果表明：不同混合生物炭表面化学官能团种类一致，含量有差异；混合生物炭的添加能够小幅度降低土壤pH值；三种混合生物炭的加入大幅度提高了土壤阳离子交换能力，且随着混合生物炭添加量的增加而增强；混合生物炭的添加显著提高了盐碱土壤的养分含量，由玉米秸秆和污泥制备的混合生物炭主要增加总磷和速效磷含量，而添加芦苇和污泥制备的混合生物炭显著提高了土壤速效钾水平；添加混合生物炭对土壤蔗糖酶和脲酶活性有显著的促进作用，尤其是高添加量（25 g/kg）对2种酶的促进作用显著高于低添加量（10 g/kg，20 g/kg）；混合生物炭对土壤过氧化氢酶活性的影响表现为中、低添加量（20 g/kg，10 g/kg）的生物炭对过氧化氢酶的促进作用显著高于高添加量（25 g/kg）。
- Abstract:
- The various effects of different straw biochar on nutrient contents and enzyme activities were studied in order to provide information for saline soil and proper management of residue. The saline soil that originated from the Inner Mongolia was used as the sample. The influences of corn stover, corn cob, reed and manicipal sludge mixing biochar that pyrolyzed that 450℃ on soil pH, CEC, nutrient contents and enzyme activities were investigated. The results showed that kinds of mixing biochar surface chemical functional groups were consistent and there were differences in contents; pH value was slightly lowered due to the increasing amount of mixing biochar, CEC in the saline soil was significantly improved. The three mixing biochar could ameliorate the nutrient contenst of saline soil. The application of biochar prepared by corn stover and sludge mainly promoted the level of available K while the biochar prepared by reed and sludge improved the contents of total P and available P. Adding mixing biochar had the significant promotive effects on the activities of sucrase and urease in the soil，and the promotive effects of adding high dose of biochar were significantly greater than those of adding middle dose or low dose of biochar.The impact of adding biochar on the activity of catalase in the saline soil presented that adding middle dose or low dose of biochar had significantly greater promotive effect on catalase activity than adding high dose of biochar.
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备注/Memo
收稿日期:2016-07-14;改回日期:2016-08-04。
基金项目:内蒙古自然科学基金面上项目“油料作物生物炭对包头铁矿区农田土壤中铅的稳定化研究”（2016MS0221）
通讯作者:尚少鹏(1963-),男,山东临沂人,学士,副教授,主要研究方向为水土环境修复。E-mail:620710532@qq.com