摘要
采用田间试验,研究施用生物黑炭0(CK)、8、16、32、64t.hm-25个水平对酸化茶园土壤的改良效果。结果表明,施用不同用量的生物黑炭处理与CK处理相比,0~20cm土层土壤pH值提高0.19~1.72个单位,土壤交换性酸降低0.79~3.96cmol.kg-1,土壤盐基饱和度提高20.98%~173.67%,土壤阳离子交换量增加0.80~2.46cmol.kg-1;20~40cm土层土壤pH提高0.05~0.61个单位,土壤交换性酸降低0.20~2.14cmol.kg-1,土壤盐基饱和度提高27.72%~56.51%,土壤阳离子交换量增加0.57~1.12cmol.kg-1。土壤改良效果随生物黑炭施用量的增加而增大,且对0~20cm土层土壤的改良效果大于20~40cm土层土壤。施用生物黑炭各处理春茶鲜叶产量分别为CK的106.61%、105.62%、99.89%和99.23%,各处理及与CK间差异均不显著(P>0.05)。
Ameliorating effect of biochar in varying concentrations(i.e.,0,8,16,32 and 64 t hm-2) on acidity of tea garden soils were studied in field trials.The results showed that,as compared with CK(no added biochar),the soil pH increased by 0.19-1.72,the soil exchangeable acid decreased by 0.79-3.96 cmol·kg-1,the soil base saturation increased by 20.98-173.67%,and the soil cation exchange capacity(CEC) increased by 0.80-2.46 cmol·kg-1 on the 0-20 cm layer of the soils.On the other hand,in the 20-40 cm layer of the soils,the pH of the treatment samples increased by 0.05-0.61,the soil exchangeable acid decreased by 0.20-2.14 cmol·kg-1,the soil base saturation increased by 27.72-56.51%,and the soil CEC increased by 0.57-1.12 cmol·kg-1.It appeared that the soil ameliorating effect increased with increasing biochar addition.The increase was particularly significant in the 0-20 cm than the 20-40 cm layer of the soils.The yield of the fresh tea leaves was changed 6.61%,5.62%,-0.11% and-0.77% by the addition of biochar at the rates of 8,16,32 and 64 t·hm-2,respectively.However,no significant differences(P0.05) on tea yields between the treatments and control was found.
出处
《福建农业学报》
CAS
2012年第2期167-172,共6页
Fujian Journal of Agricultural Sciences
基金
国家科技支撑计划项目(2008BAD95B08)
现代农业产业技术体系建设专项(CARS-23)
福建省科技计划项目--省属公益类科研院所基本科研专项(2010R1014-2
2011R1014-5)
关键词
生物黑炭
土壤酸化
土壤改良
茶园
biochar
soil acidification
soil
soil amelioration
tea garden