摘要
以泥质滨海重盐土低成本、快速脱盐为目标,通过室内土柱法,探讨了模拟滴灌条件下,滴灌量和不同土壤改良剂配比对滨海重盐土耕作层的脱盐效果,采用L16(45)正交试验设计分析不同土壤改良剂对土壤脱盐效果的影响,优选泥质滨海重盐土脱盐改良剂。结果表明:通过滴灌量与土壤改良剂配比双重作用对滨海重盐土全盐含量和pH值的影响,确定了以0.26m3/m2滴灌量进行滴灌,脱盐率达78.73%,可以达到快速脱盐的目的。根据正交设计极差分析,5种改良剂对土壤全盐含量的影响顺序依次为磷石膏>腐植酸>有机肥>ZnSO4>秸秆,对土壤pH值的影响顺序为磷石膏>腐植酸>ZnSO4>秸秆>有机肥,最终选出滨海重盐土脱盐改良剂最优配比为A1B1 C2 D2 E4,即秸秆0.05m3/m2+磷石膏3kg/m2+有机肥0.1m3/m2+腐植酸0.06kg/m2+ZnSO40.12kg/m2。
The desalting effect of drip irrigation amount and soil amendments ratio on the coastal saline soil were discussed under the condition of simulating drip irrigation through soil column for the purpose of quick desalination of coastal heavy solonchack with low cost.The influence of soil amendments on soil infiltration and desalting effect were analyzed by orthogonal experiments design,and desalination modifier of muddy coastal heavy solonchak was screened.The results suggest that the irrigation amount of 0.26m^3/m^2 is the best drip irrigation schedule,the desalination rate is over 78.73%,which can achieve rapid desalting.According to the analysis of orthogonal design,the sequence of the influences of 5kinds of modifiers on soil total salt is phosphogypsum〉humic acid〉organic matter〉ZnSO4〉straw,sequence of influence on soil pH value is phosphogypsum〉humic acid〉ZnSO4 〉straw〉organic matter.Finally,the best proportion of soil amendments of muddy coastal heavy solonchack is A1 B1 C2 D2 E4,which is 0.05 m^3/m^2 straw,3kg/m^2 phosphogypsum,0.05m^3/m^2 organic fertilizer,0.03kg/m^2 humic acid ＋ 0.03kg/m^2ZnSO4.
出处
《水土保持研究》
CSCD
北大核心
2015年第1期168-171,共4页
Research of Soil and Water Conservation
基金
河北省国土资源厅项目"河北滨海中重度盐碱地土地整治潜力与关键技术研究"(2014055616)
关键词
滨海重盐土
脱盐技术
土柱
滴灌
改良剂
coastal heavy solonchack
desalination technology
soil column
drip irrigation
amendment
