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作者	单位
褚军杰, 郑佩君, 陶娟花, 张金萍, 邹平, 刘迎夏, 马进川	(1.农产品质量和安全生物和化学威胁管理国家重点实验室, 环境资源与土壤肥料研究所, 浙江省农业科学院,浙江杭州 310021 2.余姚市农业农村局, 浙江余姚 315040 3.浙江省绍兴市柯桥区农业水产技术推广站，浙江柯桥 312030 4.浙江农林大学环境与资源学院,浙江杭州 311300)

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中文摘要:

为筛选出适宜于稻麦轮作区镉（Cd）轻度污染农田小麦安全生产的土壤调理剂，对比了石灰、腐殖酸型土壤调理剂、高钙型土壤调理剂、钾镁型土壤调理剂和壳寡糖型土壤调理剂对小麦产量、土壤Cd有效性和小麦Cd吸收的影响。结果表明，与不施调理剂处理（CK）相比，土壤调理剂处理下小麦产量和土壤pH值均显著提高，增幅分别为5.05%~12.78%和6.44%~15.58%，以钾镁型土壤调理剂的效果最佳；土壤调理剂处理均可显著降低土壤有效态Cd含量，降幅为10.94%~24.13%。钾镁型土壤调理剂和腐殖酸型土壤调理剂处理下小麦植株各部位中的Cd含量均显著降低，其中籽粒Cd含量的降低与Cd从根系到茎秆、叶片到颖壳的转移系数降低紧密相关。这说明土壤调理剂对土壤酸碱平衡、Cd形态有一定的调节作用，有利于减少小麦植株对土壤Cd的吸收和累积，可增加籽粒产量。

英文摘要:

To screen the soil conditioner suitable for safe utilization of low-cadmium (Cd) contaminated farmland in rice-wheat rotation regions, this study compared the effects of lime, humic acid soil conditioner, high calcium soil conditioner, potassium-magnesium soil conditioner, and chito-oligosaccharide soil conditioner on wheat yield, soil Cd availability and wheat Cd uptake. The results showed that compared with the control with out soil conditioner(CK), soil pH and wheat yield of soil conditioner treatments were significantly increased by 5.05%-12.78% and 6.44%-15.58%, respectively, especially for the potassium-magnesium soil conditioner; all the soil conditioner treatments could significantly reduce the concentration of soil available Cd by 10.94%-24.13%. Both the potassium-magnesium and humic acid soil conditioner significantly reduced the Cd accumulation in wheat root, steam, leaves, glume and grain, and reduced grain Cd accumulation by decreasing the translocation factor between root and steam, leaves and glume. This study can provide a technical support for the safe production of wheat in low-cadmium (Cd) contaminated farmland of rice-wheat rotation regions.

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