摘要
以油菜品种秦优九号为材料,通过盆栽试验研究了油菜对镉胁迫的响应及其产地环境安全临界值。结果表明:随着土壤中镉浓度的增大,植株的生物量、光合速率和产量均随着镉浓度的增加而显著下降,植株中N、P、K含量均随着镉浓度的增大而显著下降,而土壤中N、P、K含量均随着镉浓度的增大而显著升高。依据国家《食品污染物限量(GB2762─2005)》标准,进行方程拟合,得出油菜产地土壤镉的安全临界值为2.09 mg/kg,高于国家《食用农产品产地环境质量评价标准(HJ332─2006)》中规定的标准。
A pot experiment was conducted to study the response of oilseed rape(Brassica napus cv.Qinyou 9) to cadmium stress and its critical value for the environmental safety in producing area.Along with the increase of cadmium concentration in soil,the plant biomass,photosynthetic rate and yield all decreased gradually,the contents of nitrogen,phosphorus and potassium in rape plants all decreased gradually,but the contents of nitrogen,phosphorus and potassium in soil all increased significantly.According to the na...
出处
《江西农业学报》
CAS
2011年第2期24-26,共3页
Acta Agriculturae Jiangxi
关键词
油菜
镉胁迫
产量
安全临界值
Oilseed rape
Cadmium stress
Yield
Critical value for safety
