摘要
在大田条件下研究不同种类有机物料与有机肥配施对新建蔬菜大棚土壤的不同形态有机碳含量及碳库管理指数（CPMI）的影响。试验设计6个处理：不施肥（CK）、常规施肥（CM）、施玉米秸秆＋鸡粪（SM）、施草炭＋鸡粪（PM）、施蘑菇渣＋鸡粪（MM）和施高量鸡粪（HM）。研究结果表明：施肥的种类和数量均对土壤总有机碳（TOC）、易氧化有机碳（LOC）、微生物量碳（MBC）、水溶性有机碳（DOC）、碳库管理指数（CPMI）有显著的影响，高碳素投入量及有机肥与有机物料配施均有助于提高土壤不同形态活性有机碳含量，相应地也就提高了土壤CPMI。其中MM处理对土壤TOC，LOC，MBC，DOC的提高效果最显著，与空白处理相比，增幅在36％～182％；其碳库管理指数较等碳量的SM，PM，HM处理提高28％以上。土壤LOC，MBC，DOC，CP—MI与TOC之间呈极显著相关关系，其中以DOC与有机碳库其他组分间相关性最好。不同形态有机碳及碳库管理指数对不同有机肥及其配施响应的变化特征表明，在有机农业生产中重视有机肥的选择和配合施用，将使土壤碳库处于良性状态，达到更好的培肥效果。
A field experiment was conducted to determine effects of 6 treatments including no fertilization （CK）, con- ventional fertilization （ CM ） , corn straw plus chicken manure （ SM ） , peat plus chicken manure （ PM ） , mushroom residue plus chicken manure （MM） and high level of chicken manure （HM） on different soil active organic carbon and carbon pool management index （CPMI）. The results showed that soil total organic carbon （TOC） , easily oxi- dized organic carbon （ LOC ）, microbial biomass carbon （ MBC）, water soluble organic carbon （DOE） were signifi- cantly influenced by the amount and type of organic fertilizers. Both improved carbon input and combined application of different organic fertilizers＂ greatly increased different forms of organic carbon content, and thereafter improved soil CPMI. The MM treatment has the most significant increase effect on the contents of SOC, LOC, MBC, DOC. The MM treatment increased these forms of carbon contents by 36%-182% compared with CK treatment and carbon pool management index by 28% compared with SM, PM, and HM treatments. Significant relationships were found among soil LOC, MBC, DOC, CPMI and TOC. Therefore, the results demonstrated that the selection of organic fertilizers and its combined application would make the soil carbon pool in a benign state and achieve better fertilizing effect in organic agricultural production.
出处
《浙江农业学报》
CSCD
北大核心
2013年第5期1079-1085,共7页
Acta Agriculturae Zhejiangensis
基金
北京市自然科学基金项目(6122014)
行业科研专项(2012030450301)
北京市农林科学院青年科研基金项目(QNJJ201016)
关键词
有机肥
有机碳
碳库管理指数
大棚蔬地
organic fertilizer
organic carbon
carbon pool management index
greenhouse vegetable land
