本文研究两组同龄新疆杨(Populus alba L.var.pyramidalis)(一组土壤含盐量较低,树木长势良好,另一组土壤盐分高,树木长势差)对盐分离子的吸收选择性系数和从根至边材,从边材至叶的运输选择性系数,结合盐分离子在树体各部位的分布状况,...本文研究两组同龄新疆杨(Populus alba L.var.pyramidalis)(一组土壤含盐量较低,树木长势良好,另一组土壤盐分高,树木长势差)对盐分离子的吸收选择性系数和从根至边材,从边材至叶的运输选择性系数,结合盐分离子在树体各部位的分布状况,探讨新疆杨对长期盐胁迫的生理反应。主要结论为:盐胁迫下新疆杨通过选择性吸收K+,抑制过多Na+进入根系,新疆杨对盐分离子的运输选择性主要体现在根向边材的运输中,新疆杨根系对Na+具有较强的截留作用,对Cl-和SO42-也有一定截留作用。展开更多
An assembled Mg 2Al CO 3 SO 4 hydrotalcite has been prepared by ion exchanging of Mg 2Al CO 3 hydrotalcite with SO 2- 4 . The Mg 2Al CO 3 SO 4 hydrotalcite obtained has well formed crystal structure and performs highe...An assembled Mg 2Al CO 3 SO 4 hydrotalcite has been prepared by ion exchanging of Mg 2Al CO 3 hydrotalcite with SO 2- 4 . The Mg 2Al CO 3 SO 4 hydrotalcite obtained has well formed crystal structure and performs higher selective IR adsorption function than Mg 2Al CO 3 hydrotalcite.展开更多
文摘本文研究两组同龄新疆杨(Populus alba L.var.pyramidalis)(一组土壤含盐量较低,树木长势良好,另一组土壤盐分高,树木长势差)对盐分离子的吸收选择性系数和从根至边材,从边材至叶的运输选择性系数,结合盐分离子在树体各部位的分布状况,探讨新疆杨对长期盐胁迫的生理反应。主要结论为:盐胁迫下新疆杨通过选择性吸收K+,抑制过多Na+进入根系,新疆杨对盐分离子的运输选择性主要体现在根向边材的运输中,新疆杨根系对Na+具有较强的截留作用,对Cl-和SO42-也有一定截留作用。
文摘An assembled Mg 2Al CO 3 SO 4 hydrotalcite has been prepared by ion exchanging of Mg 2Al CO 3 hydrotalcite with SO 2- 4 . The Mg 2Al CO 3 SO 4 hydrotalcite obtained has well formed crystal structure and performs higher selective IR adsorption function than Mg 2Al CO 3 hydrotalcite.