摘要
利用长期定位试验研究了施肥对黑土有机无机复合体组成及有机碳在土壤有机无机复合体中分配的影响,试验设不施肥(CK)、单施化肥(NPK)、有机肥与化肥配施(NPKM)和秸秆与化肥配施(NPKS)4个处理.结果表明:施肥有利于土壤有机碳及有机碳各组分含量的增加.不同的施肥处理中,施用有机物料处理对黑土有机碳在有机无机复合体中分配影响最为突出,有利于土壤粉粒级和细砂粒级复合体的形成,使土壤中这2个粒级的复合体含量增加,粘粒复合体含量减少.同时使土壤有机碳在粉粒级和细砂粒级复合体中的分配量增加,在粘粒复合体中的分配量减少.施肥使有机碳的各组分在不同的复合体中含量都趋于增加,其中HA-C增加的幅度要大些.不同施肥处理中,有机肥与化肥配合(MNPK)施用的效果最好.
A long-term field experiment to study the effect of fertilization on organo-mineral complex component and distribution character of organic carbon was carried out. The experiment included four treatments： （ 1 ） Zero fertilization （ CK）, （ 2 ） chemical fertilizers alone （ NPK）, （ 3 ） combination of organic manure and chemical fertilizers （ NPKM ） , （ 4 ） combination of straw manure and chemical fertilizers （NPKS）. The results showed that the fertilization tended to increase the contents of soil organic carbon and the component of soil organic carbon. The effect of applying organic matter on the distribution of organic carbon in phaeozem in organo-mineral complex was the most significant in the different fertilization treatments and applying organic matter improved the formation of silt-size fraction and fine sand-size fraction complex, increased their contents, therefore decreased the content of clay-size fraction complex. At the same time applying organic matter could increase the content of the distribution of organic carbon in silt-size fraction and fine sand-size fraction complex, therefore could decrease the content of distribution of organic carbon in clay-size fraction complex. In addition, the treatment of combination organic manure and chemical fertilizers （NPKM） treatment was better than other fertilizer treatment. All fertilization treatments could increase the content of the composition in different complex, especially HA - C content,and the treatment of NPKM was the best in all fertilization treatments.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2008年第3期11-15,共5页
Journal of South China Agricultural University
基金
国家自然科学基金(30370846)
国家863计划(2006AA10A309)
吉林农业大学博士后基金
关键词
黑土
施肥处理
有机碳
有机无机复合体
phaeozem
fertilization treatment
organic carbon
organo-mineral complex
