摘要
通过室内模拟实验,研究了黑土添加玉米秸秆对团聚体组成、有机碳、氮及净积累有机碳、氮在不同粒径团聚体中的分布和碳、氮贮量的影响,探讨不同粒径团聚体对土壤固碳和肥力的贡献份额。研究结果表明：未添加玉米秸秆黑土,0.25~0.053 mm微团聚体含量最多,〉2 mm大团聚体最少;土壤有机碳、氮主要分布在〉2 mm和2~0.25 mm团聚体中;2~0.25 mm和0.25~0.053 mm团聚体中土壤有机碳、氮贮量最高。黑土添加玉米秸秆360 d期间,促进了土壤的团聚作用,〉2 mm大团聚体成为优势粒级;土壤有机碳和净积累有机碳主要分布在〉2 mm团聚体中,0.25~0.053 mm团聚体中分布最少;全氮和净积累氮主要分布在〉2 mm和〈0.053 mm团聚体中;土壤有机碳、氮贮量随着团聚体粒径的增大而增加。
The effects of application corn stalk on the composition of aggregates and the storages of the soil organic carbon（SOC） and total nitrogen（TN） and the distribution of SOC,N and accumulated net SOC,N in different size fraction aggregates in black soil were researched by incubation.The results showed in black soil of no-applied corn stalk the content of 0.25~0.053 mm microaggregates was most and least in 2 mm macroaggregates;SOC and N were mainly distributed in 2 mm and 2~0.25 mm aggregates;The storages of SOC and TN were highest in 2~0.25 mm and 0.25~0.053 mm aggregates.Application of corn stalk promoted agglomeration of black soil and the content of 2 mm aggregates became the most.SOC and accumulated net SOC were mainly distributed in 2 mm aggregates and least in 0.25~0.053 mm aggregates;TN and accumulated net N were primarily distributed in 2 mm and 0.053 mm aggregates;The storages of SOC and TN in different size fraction aggregates were increasing with the increase of aggregates size.
出处
《水土保持学报》
CSCD
北大核心
2010年第4期187-191,共5页
Journal of Soil and Water Conservation
基金
国家自然科学基金项目(40471076
40871107
40971141)
关键词
土壤团聚体
土壤有机碳
全氮
玉米秸秆
soil aggregates
soil organic carbon
total nitrogen
corn stalk
作者简介
关松（1969-），女，在读博士，剐教授，主要从事土壤环境与生物化学研究。E—mail：guansong8888@163．com
通讯作者：窦森（1959-），男，博士生导师，教授，主要从事土壤环境与生物化学研究。E-mail：dousen@public．cc．jl．cn
