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| 1 | 土壤-作物系统中铅的研究进展显示文摘重金属铅不是作物生长的必需元素 ,而是一种对作物有积累性危害的污染物质。铅一旦污染土壤 ,很难降解、去除。铅对土壤污染后 ,可导致农产品产生残毒 ,并可通过土壤 作物系统进入食物链 ,危害人体健康。本文就农田土壤 作物系统中铅的来源、积累与迁移等研究进行综述 ,旨在提醒人们关注铅的危害 。 | 李丽光 何兴元 曹志强 陈玮 | 2004 | 生态学杂志2004，23，1： | 22 |
| 2 | Interaction Between Charge Characteristics and Cu^(2+) Adsorption-Desorption of Soils with Variable or Permanent Charge显示文摘Charge characteristics and Cu2+ adsorption-desorption of soils with variable charge (latosol) and per-manent charge (brown soil) and the relationship between them were studied by means of back-titration andadsorption equilibrium respectively. The amount of variable negative charge was much less in variable-chargesoil than in permanent-charge soil and increased with the pH in the system, but the opposite trend occurredin the points of zero charge (PZCs). The amount of Cu2+ ions sorbed by permanent-charge soil was morethan that by variable-charge soil and increased with the increase of Cu2+ concentration within a certainrange in the equilibrium solution. The amount of Cu2+ ions desorbed with KCl from permanent-chargesoil was more than that from variable-charge soil, but the amount of Cu2+ ions desorbed with de-ionizedwater from permanent-charge soil was extremely low whereas there was still a certain amount of desorptionfrom variable-charge soil. The increase of PZC of soils with variable or permanent charge varied with theincrement of Cu2+ ions added. When the same amount of Cu2+ ions was added, the increments of PZC andvariable negative surface charge of permanent-charge soil were different from those of variable-charge soil. | LI XUEYUAN, LING WANTING and HE JIZHENGKey Laboratory of Subtropical Soil Resources and Environment, Chinese Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070 (China) | 2002 | Pedosphere2002，12，4： | 12 |
| 3 | 化学改良剂对红壤中铜、镉吸附行为的影响显示文摘选取壳聚糖和二氧化钛为化学改良剂,分析其对土壤中铜、镉吸附解析行为的影响,以期探明改良剂对污染土壤的修复效果。结果表明,增施壳聚糖可提高土壤中铜、镉活性,二氧化钛则钝化了土壤中重金属的活性,其中纳米二氧化钛和试剂型二氧化钛的钝化效果差别不大。综合考虑经济效益和处理效果,壳聚糖和二氧化钛的合理用量为土重的1%。当培养时间超过20d,各改良剂与土壤重金属作用趋于稳定。土壤酶的种类不同,对土壤重金属的指示作用各异,相比过氧化物酶,脲酶能较好地指示土壤铜、镉污染。 | 丁园 刘燕红 郝双龙 刘崇波 | 2010 | 江西农业大学学报2010，32，4： | 7 |
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