YUANLi-wei,LIUGui-lan,YANGZhi-chen,et al.EffectsofSeveralTillageModelsonActiveOrganicCarbonofFluvo-aquicSoil[J].Northern Horticulture,2013,37(16):195-198.
几种耕作措施对华北潮土活性有机碳的影响
- Title:
- EffectsofSeveralTillageModelsonActiveOrganicCarbonofFluvo-aquicSoil
- 文章编号:
- 1001-0009(2013)16-0195-04
- Keywords:
- activesoilorganiccarbon; tillage; soilqualitativewatercontent; soiltemperature; decompositionvelocityofstraw; CO2 emissionflux
- 分类号:
- S153.6+1
- 文献标志码:
- A
- 摘要:
- 以河北省栾城长期耕作定位试验田为研究对象，研究了翻耕秸秆不还田（F1）、翻耕秸秆还田（F2）、旋耕（X）和免耕（M）4种耕作处理对土壤活性有机碳含量、土壤含水量、土壤温度、秸秆分解速率及CO2排放通量的影响。结果表明：土壤活性有机碳含量随季节呈动态变化，6~7月份的土壤活性有机碳含量显著低于4~5月和8~9月，土壤活性有机碳含量在不同耕作措施情况下表现为：X>M>F2>F1，旋耕处理的活性有机碳含量高于其它处理11.27%~91.46%。土壤活性有机碳分别与土壤质量含水量、土壤温度和CO2排放通量呈显著负相关，与秸秆分解速率呈显著正相关。4种耕作处理中旋耕处理的土壤活性有机碳含量最高，而免耕处理的土壤活性有机碳含量低于旋耕是由秸秆还田深度决定的。
- Abstract:
- Takelong-termpositioningtillageplotsinLuanchengofHebeiasstudyobject，theeffectoffourtillagemodelsincludingtraditionalmoldboardtillage(F1)，traditionalmoldboardtillagewithstrawreturning(F2)，rotarytillage(X)andnotillage(M)onactivesoilorganiccarbon(SOC)content，soilwatercontent，soiltemperature，decompositionvelocityofstrawandCO2emissionfluxwerestudied.TheresultsshowedthattherewasvarianceofactiveSOCindifferentseasons.ActiveSOCcontentinJunetoJulywassignificantlylowerthanApriltoMayandAugusttoSeptember；activeSOCcontentatdifferenttillagemodelsshowedX>M>F2>F1，activeSOCcontentofXwas11.27%~91.46%significantlyhigherthanothertillagemodels.ActiveSOCcontenthadasignificantnegativerelationshipwithsoilqualitativewatercontent，soiltemperatureandCO2 emissionflux，andithadasignificantpositiverelationshipwithdecompositionvelocityofstraw.ActiveSOCcontentofXwasthehighestinfourtillagemodels，whileactiveSOCcontentofMwaslowerthanXdependedonthedepthofstrawreturning.
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备注/Memo
第一作者简介：袁丽伟（1983-），女，本科，讲师，现主要从事园林学的教学与保护性耕作对土壤有机碳特性等研究工作。E-mail：yuanliwei@163.com.
责任作者：杨志臣（1975-），男，博士，现主要从事农田土壤碳循环及土壤质量方面的研究工作。E-mail：cauyzc@gmail.com.
基金项目：国家“十二五”科技支撑计划资助项目(2012BAD14B01-1)。
收稿日期：2013-04-20