摘要
[目的]为了研究土壤镉污染对马铃薯氮、磷、钾、镉含量与积累量的影响。[方法]采用盆栽方式,以费乌瑞它马铃薯为试验材料,测定采收后的马铃薯产量、氮磷钾镉含量及积累量。[结果]轻度的镉胁迫降低了马铃薯块茎氮含量,而中度和重度镉胁迫下马铃薯块茎氮含量增加,镉污染各处理氮积累量均显著低于对照处理;随着土壤镉浓度的增加,磷含量在0.01水平显著增加,而磷积累量变化不大;土壤不同镉处理马铃薯钾含量均在0.01水平显著高于对照处理,土壤轻度镉处理马铃薯钾积累量最高,随着镉污染程度的加大,钾积累量降低;土壤不同浓度镉处理下马铃薯块茎镉含量与积累量均呈直线0.01水平显著正相关。[结论]土壤镉污染马铃薯氮肥施用量降低,磷肥施用量不变,轻度镉污染增加钾肥施用量,土壤镉重度污染不适合种植马铃薯。
[ Objective] The research aimed to study nitrogen, phosphorus, potassium and cadmium elements content and accumulation of potato under different cadmium stress in soil. ~ Method] The content nitrogen, phosphorus, potassium and cadmium elements content and accumulation of potato CV. Favorita applied with cadmium pollution in soil were studied by pot experiment. [ Result] There were the effects on elements con- tent and accumulation of potato under different cadmium concentration treatment. Nitrogen element content was reduced under soil light stress. Nitrogen element content was increased under moderate and severe stress. Nitrogen accumulation of cadmium pollution was significantly lower than the control. Phosphorus element content was significantly increased with soil cadmium levels increasing, but phosphorus accumulation showed little change. Potassium element content of different cadmium concentration treatment was significantly higher than the control. Potassium accumu-. lation of cadmium light stress was the highest. With cadmium pollution level increasing, potassium accumulation had reduced. Soil cadmium treatment with different concentrations and potato tuber cadmium content and accumulation had extremely significant positive linear correlation. E Conclusion] The nitrogenous fertilizing amount of potato was reduced under cadmium pollution in soil. The phosphatic fertilizing amount was in- variant. The potassic fertilizing amount of hght stress in soil was increased. Potato shouldn＇ t be planted in the soil polluted by cadmium severel.
出处
《安徽农业科学》
CAS
2013年第14期6238-6240,共3页
Journal of Anhui Agricultural Sciences
基金
"六盘水马铃薯安全生产关键技术研究"(5202020100102)
"贵州薯类育种及产业化研发平台建设"(黔科合院所创能[2010]4006)
关键词
马铃薯
镉
含量
积累量
Potato
Cadmium
Content
Accumulation
