潴育型水稻土稻米镉污染VIP控制技术试验初报

2015年,在宁远县潴育型水稻土上开展稻田VIP镉污染控制技术的小区和大田示范试验,分析农艺性状,对试验区域的土壤pH值和糙米镉含量进行比较。结果表明:VIP控制技术对水稻田污染起到一定的控制作用,土壤pH值较试验前有明显提高,土壤镉含量均有一定程度的减少,采用低镉品种加施用生石灰的效果极显著优于施用生物菌肥,早稻稻米含镉量明显低于晚稻稻米含镉量,实现了镉污染农田土壤中生产的稻米镉含量降低61%,达到国家稻米安全生产的目标(镉含量0.2 mg/kg),但对生育期、产量有所影响。

A Preliminary Study on Rice VIP Cadmium Pollution Control Technology in Storage Type Paddy Soil

Plot test and field demonstration experiment of VIP cadmium pollution control technology in storage type rice paddy were conducted in Ningyuan County from 2015, by analyzing the characteristics of agronomy, and comparing the pH value of soil and the content of brown rice. The results showed that VIP control technology plays a certain role in the pollution of paddy fields. The soil pH was significantly higher than that before the test, and the soil cadmium content reduced to a certain extent. The results of low cadmium variety and calcium lime control were significantly superior to that of biological fertilizer, and the amount of Cd in early rice was significantly lower than that of late rice. It was implement the cadmium pollution in the production of rice farmland soil cadmium content by 61%, achieved the goal of national rice production safety (cadmium content < 0.2 mg/kg), but it has negative effects on fertility and yield.