摘要
[目的]探究鸡粪和炉渣添加对疏浚土的改良效果,为疏浚土资源化利用提供理论依据。[方法]以疏浚土为供试土壤,皇竹草为供试植物开展盆栽试验,设置4个处理,分别为对照(CK)、添加5%鸡粪(T_(1))、添加5%鸡粪+5%炉渣(T_(2))、添加5%鸡粪+10%炉渣(T_(3)),分析不同处理对疏浚土理化性质、皇竹草生长及养分吸收的影响。[结果]与CK相比,3种处理均显著改善了疏浚土的理化性质。其中,T_(3)处理的容重显著低于其他处理,总孔隙度和毛管持水量显著高于其他处理;且土壤有机质、全氮、全磷、全钾、碱解氮、速效磷和速效钾含量均为最高水平。鸡粪和炉渣添加显著促进皇竹草的生长及养分积累,T_(3)处理的促进效果最佳,株高、生物量及地上部和地下部的N,P,K积累量均最大,且显著高于其他处理。主成分分析方法综合评价结果显示:不同处理对疏浚土的改良效果排序为T_(3)>T_(2)>T_(1)。[结论]添加鸡粪或鸡粪+炉渣能显著改善疏浚土的理化性质,促进皇竹草生长和养分累积,且T_(3)处理对疏浚土的改良效果最佳。
[Objective]The improvement effects of chicken manure and slag addition on dredged soil were investigated in order to provide a theoretical basis for resource utilization of dredged lake soil.[Methods]A pot experiment was conducted with dredged soil as the test soil and Pennisetum hydridum as the planted species.Four treatments were established:control(CK,no additions of chicken manure and slag),addition of 5%chicken manure(T_(1)),5%chicken manure+5%slag(T_(2)),and 5%chicken manure+10%slag(T_(3)).The effects of the different treatments on the physicochemical properties of the dredged soil,and on the growth and nutrient uptake of Pennisetum hydridum were analyzed.[Results]All three treatments significantly improved the physicochemical properties of the dredged soil compared with CK.T_(3)had significantly lower bulk density and higher total porosity and capillary water holding capacity than the other treatments.Soil organic matter,total nitrogen,total phosphorus,total potassium,alkaline hydrolysis nitrogen,available phosphorus,and available potassium content were all at the highest levels with T_(3).The chicken manure and slag additions significantly increased the growth and nutrient accumulation of Pennisetum hydridum,with the T_(3) treatment showing significantly greater plant height,biomass,and accumulation of nitrogen,phosphorus,and potassium in aboveground and belowground plant tissues than observed for the other treatments.The results of the comprehensive evaluation by principal component analysis showed that the capacity of the three treatments to improve dredged soil followed the order of T_(3)>T_(2)>T_(1).[Conclusion]The addition of chicken manure or chicken manure+slag significantly improved the physicochemical properties of the dredged soil and promoted the growth and nutrient accumulation of Pennisetum hydridum,and the T_(3) treatment had the greatest capacity to improve dredged soil.
作者
冯为迅
谢姗宴
苏立城
彭维新
苏思宁
曾庆军
曾曙才
Feng Weixun;Xie Shanyan;Su Licheng;Peng Weixin;Su Sining;Zeng Qingjun;Zeng Shucai(College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou,Guangdong 510642,China;CCCC Fourth Aviation Engineering Research Institute Co.,Ltd.,Guangzhou,Guangdong 510230,China)
出处
《水土保持通报》
CSCD
北大核心
2023年第1期61-68,共8页
Bulletin of Soil and Water Conservation
基金
中交四航工程研究院项目“基于先锋植物的疏浚土生态固化技术研究”(H20532)。
关键词
疏浚土
土壤改良
鸡粪
炉渣
皇竹草
dredged soil
soil improvement
chicken manure
furnace slag
Pennisetum hydridum
