3种有机物料对宅基地复垦土壤易变有机碳的影响  

Effects of 3 Kinds of Organic Materials on Labile Organic Carbon of Homestead Reclaimed Soil

作　　者：闫锐[1,2] 李彦霖[1,2] 邓良基[1,2] 邓欧平[1,2] 谢尚春[3] 张世熔[4] 高雪松[1,2] 赖阳丹 

机构地区：[1]四川农业大学资源学院,成都611130 [2]四川农业大学资源与地理信息技术研究所,成都611130 [3]成都农业科技职业学院,成都611130 [4]四川农业大学环境学院,成都611130

出　　处：《水土保持学报》2016年第4期233-241,共9页Journal of Soil and Water Conservation

基　　金：四川省科技厅科技支撑计划项目(2013NZ0027)

摘　　要：在成都平原宅基地复垦土壤上,以秸秆、菌渣和猪粪3种物料为有机肥料,配施化肥来平衡氮磷钾总用量,分小麦（春）和玉米（夏）两季开展田间试验,研究有机物料对土壤有机碳及易变有机碳的影响。结果表明：（1）3种物料配施化肥处理对复垦土壤TOC含量有提升效果,随土层的加深效果减弱,麦玉两季0—20cm和20—40cm土层提幅分别为0.15-0.26,0.08-0.20g/kg,提升效果为菌渣〉猪粪〉秸秆。（2）3种物料配施化肥处理对复垦土壤微生物碳（MBC）含量提升效果最好,并随土层的加深效果增强,麦玉两季0—20cm和20—40cm土层提幅分别为21.42%-54.59%,116.59%-150.12%,提升效果为菌渣〉猪粪〉秸秆。（3）3种物料配施化肥处理对土壤易氧化有机碳（POXC）的提升效果居中,并随土层的加深效果减弱,麦玉两季0—20cm和20—40cm土层提幅分别为41.51%-51.90%,18.77%-29.68%,提升效果为菌渣=秸秆〉猪粪。（4）3种物料配施化肥处理对土壤可溶性有机碳（DOC）的提升效果最差,并随土层的加深效果增强,麦玉两季0—20cm和20—40cm土层提幅分别为-1.89%-3.61%,6.77%-17.31%,提升效果为菌渣〉猪粪〉秸秆。（5）5种处理在麦—玉轮作下均能增加宅基地复垦土壤TOC、POXC、MBC及DOC的含量,且3种有机物料处理更加显著,单施化肥（CF）和不施肥（CK）对土壤TOC及易变有机碳组分含量有一定的提升效果。（6）宅基地复垦土壤的POXC、DOC和MBC与TOC均呈显著相关（P〈0.05）;POXC、DOC和MBC与土壤养分在0—20cm比20—40cm土层相关性强。据此,在麦—玉轮作下＂菌渣堆肥还田＂处理对于改良宅基地复垦土壤、提高土壤肥力具有较好的效果。A field plot experiment was conducted to study the effect of organic material on soil organic carbon and labile organic carbon in wheat-maize rotation system under different fertilization treatments, including straw with chemical fertilizer for balance of N, P and K total amount （SCF）, fungi residue with chemical fertilizer （FCF）, and pig manure with chemical fertilizer （MCF）, in homestead reclamation soil of Chengdu plain. The main conclusions were as follows. （1） 3 treatments increased TOC content of reclamation soil by 0.15 to 0.26 g/kg （in 0--20 cm soil layer） and 0.08 to 0.20 g/kg （in 20 40 cm soil layer）, respectively. The increase extent gradually decreased with the increasing soil depth. The improvement effects of 3 types of fertilizers on TOC content listed in the order of FCF〉MCF〉SCF. （2） All of the 3 treatments significantly enhanced MBC content by 21.42% to 54.59% and 116.59% to 150. 12% in 0--20 cm and 20--40 cm soil layer, respectively, and the increase extent gradually increased with the increasing soil depth. The improvement effects of 3 types of fertilizers on MBC listed as follows： FCF〉MCF〉SCF. （3） The improvement effects of the 3 types of fertilizers on POXC content were moderate. The 3 organic material treatments improved POXC content of reclamation soil by 41.51% to 51.90% in 0--20 cm soil layer and by 18.77% to 29.68% in 20-40 cm soil layer. The improvement effect gradually decreased with the increasing soil depth. The improvement effects of 3 types of fertilizers on POXC listed as follows. FCF=MCF）SCF. （4） The improvement effects of the 3 fertilizers on DOC content were less significant than those on MBC and POXC content, which increased with the increasing soil depth. The 3 fertilizer treatments increased DOC content by --1.89% to 3.61% in 0--20 cm soil layer and by 6.77% to 17.31% in 20--40 cm soil layer. The improvement effects of 3 types of fertilizers on DOC listed as follows. FCF〉MCF〉SCF. （5） In wheat-maize rotation system, all o

关 键 词：宅基地复垦 土壤有机碳 易氧化有机碳 微生物量碳 

分 类 号：S158.5[农业科学—土壤学]