摘要
为了有效利用燃煤烟气脱硫废弃物(简称脱硫废弃物),探究沙枣作为改良盐碱地先锋树种的可行性。采用大田试验的方法,从土壤pH、全盐含量、碱化度(ESP)和常见离子相对含量的变化等方面,研究了脱硫废弃物改良后龟裂碱土种植沙枣的效果。结果表明:随着林木生长时间的延长,脱硫废弃物改良后的土壤pH、可溶性盐和碱化度(ESP)均有不同程度降低,pH、可溶性盐和碱化度(ESP)分别由初始的9.50、46g/kg和5.3%下降到8.31、11.4g/kg和3.1%;脱硫废弃物改良土壤种植沙枣,且达到3年,土壤的改良效果最为明显。以上结果表明,脱硫废弃物可有效降低土壤中交换性钠、交换性镁的相对含量,降低其对植物的毒害作用,改善土壤化学性质,从而有利于林木的生长和发育。
In order to effectively use the by-product of flue gas desulphurization（BFGD） and probe into the feasibility of plant Elaeagnus angustifolia L.as amelioration of saline-sodic soil pioneer species,the author used field experiment to study the effect of amelioration of saline-sodic soil with the by-product of flue gas desulphurization（BFGD） to plant Elaeagnus angustifolia L.The soil pH value,total salt content,degree of alkalization and the change of ion relative content were measured to study the effect of amelioration of saline-sodic soil with the by-product of flue gas desulphurization（BFGD） to plant Elaeagnus angustifolia L.The results showed that：with the growth time of grove and grass extending,the soil pH value,total salt content,degree of alkalization and the change of ion relative content of the amelioration of saline-sodic soil with the by-product of flue gas desulphurization（BFGD） had declined in some extent.The soil pH value,total salt content and degree of alkalization（ESP） respectively decreased from 9.50,46 g/kg and 5.3% to 8.31,11.4 g/kg and 3.1% ;In the third year,the by-product of flue gas desulphurization（BFGD） effectively reduced the exchangeable sodium.These results suggested that the by-product of flue gas desulphurization（BFGD） could reduce exchangeable relative magnesium content in soil,and its toxic effects on plant,furthermore improve soil chemical property,which was conducive to forest growth and development.
出处
《中国农学通报》
CSCD
北大核心
2011年第28期98-102,共5页
Chinese Agricultural Science Bulletin
基金
国家林业公益性行业专项"河套灌区宜林荒地植被快速恢复关键技术研究"(200804012)
国家科技支撑项目"黄河河套地区盐碱地改良及脱硫废弃物资源化利用关键技术研究与示范研究"(2007BAQ00021)
国家林业局"948"项目"利用燃煤脱硫废弃物改良盐碱地及造林技术引进"(2007-4-16)
关键词
燃煤烟气脱硫废弃物
改良
盐碱土
沙枣
效果
by-product of flue gas desulphurization（BFGD）
amelioration
saline and alkaline soil
Elaeagnus angustifolia L.
effect
