综合降镉（VIP）技术对降低糙米镉含量的影响研究

以镉低积累型水稻品种湘晚籼12号为试验材料，采用随机区组设计，于2013年在长沙、衡南、湘潭和湘阴的12个试验点，比较了以VIP技术（V，Variety，选用低镉型水稻品种；I，Irrigation，优化水分管理；P，土壤pH值，施用石灰以提高土壤pH值）为主的5种控制技术在不同成土母质和土壤污染程度下的应用效果。结果表明，5种控制技术在各试验点的总效应中，以“VIP+Se”和“VIP+Se+Bi”的处理效果最为明显，其糙米镉含量均为0.15 mg/kg，与对照相比降镉效果显著。

Effects of VIP Technology on Reducing Cadmium Content in Rice

The cadmium pollution of rice become increasingly serious, which caused enormous threats to human health and agricultur-al production. In order to find an effective way to control the cadmium content in rice, to meet the national safety levels and to provide a theoretical basis for the subsequent test, this study took the low-cadmium accumulation rice Xiangwanxian 12 as the experimental material by applying the randomized blocks design to explore and compare with five control technologies including VIP low cadmium species(variety)+reasonable irrigation(irrigation)+adjust the acidity(pH)] and 12 test points that have different soil parent materi-als and extent of soil contamination. The result showed that the effect of“VIP + Se” and“VIP + Se + Bi” treatment were better than other treatments, and the effects of cadmium reduction were significant compared with the control.