摘要
针对滨海盐渍土盐分含量高和土壤导水性能差的问题,采用禾康盐碱土改良剂、康地宝盐碱土改良剂、金满田生物菌剂、腐殖酸和石膏5种土壤改良剂,通过田间小区试验,分析测定了土壤含水量、土壤盐分含量、pH值、容重和饱和导水率等指标,并测定了作物收获产量,筛选适宜于改良研究区滨海盐渍土水盐特性的改良剂。试验结果表明:(1)土壤水分含量变化极大地影响着土壤的含盐量,土壤含水量与土壤含盐量呈极显著线性负相关关系。(2)腐殖酸在抑制滨海盐渍土盐分和降低土壤容重方面效果最佳,经腐殖酸(300kg/hm2)处理后,0—5,5—20和20—40cm土层盐分含量较CK分别减少了29.2%,32.6%和25.9%,土壤容重较CK减少了10.2%,土壤孔隙度和饱和导水率较CK也相对提高。(3)5种改良剂不同程度提高了作物的产量,以腐殖酸处理作物增产效果最为明显,玉米和油菜产量较CK分别增加了104.8%和41.6%。
The effects of five soil amendments were studied in view of the high salt content and poor hydraulic conductivity in coastal saline soils. Soil moisture, soil salt content, soil pH value, soil bulk density and soil saturated hydraulic conductivity were analyzed by a field plot experiment in order to select the most suitable amendment to improve the water and salt characteristics in coastal saline soil area. Results are as follows： （1） The change of the soil salt content was greatly influenced by the soil moisture. There was a very remark- ably negative linear relationship between the soil salt content and soil moisture. （2） Compared with CK, the soil salt content was decreased by 29.2%, 32.6% and 25.9% at the soil depths of 0-5, 5-20 and 20-40 cm, respectively, after the treatment of humic acid（300 kg/hm2）, and the soil bulk density was decreased by 10.2G, while the soil porosity and soil saturated hydraulic conductivity increased. （3） The five soil amend- ments increased crop yield differently, and the effect of humic acid was the best. Corn and rape yields after the treatment of humic acid was increased by 104.8% and 41.6%, respectively, as compared with CK.
出处
《水土保持通报》
CSCD
北大核心
2013年第1期261-264,共4页
Bulletin of Soil and Water Conservation
基金
公益性行业(农业)科研项目"盐碱地农业高效利用配套技术模式研究与示范"(200903001)
江苏高校优势学科建设工程资助项目
关键词
滨海盐渍土
盐碱土改良剂
土壤容重
盐分含量
饱和导水率
coastal saline soil
saline-alkali soil amendment
soil bulk density
salt content
saturated hydraulicconductivity
