摘要
通过大田和盆栽试验研究了低硒土壤中主栽大豆品种积累硒的品种差异并对其机理进行了初步探讨。结果表明 ,无论施硒与不施硒 ,不同大豆品种子粒对硒的积累均存在显著的差异。供试品种中 ,通矮 4 0 5积累土壤硒的能力较强 ,启东绿皮黄豆硒肥的肥效较高。盆栽试验结果表明 ,两品种子粒积累硒的差异是由于植株对土壤有效硒利用率的不同造成的。在硒酸钠依时间和浓度的吸收动态试验中 ,通矮 4 0 5幼苗含硒量均高于启东绿皮黄豆 ,但硒从根部向地上部的运输则无差异。说明通矮 4 0 5植株对土壤溶液中Se6 +较强的吸收能力导致了其对低硒土壤中有效硒有较高的利用率 ,是其子粒积累硒能力较强的根本原因。
Selenium uptake and accumulation by different soybean cultivars in low-Se soils were studied with both field and pot experiments. The results showed that significant difference of seed Se accumulation existed among soybean cultivars supplied with or without selenite. Tong-ai 405 cultivar has higher Se sensitivity and can accumulate 4 times higher Se in seeds than Qidong green-skin cultivar, however, the latter has higher capability of utilizing fertilizer Se. Yet, the findings with pot experiments support with field study results.Higher Se uptake by Tong-ai 405 roots of soil indigineous Se is responsible for its higher Se concentration in seeds. The further experiments with selenite uptake kinetics showed that the difference of Se uptake by roots of the two cultivars in low-Se soils was mainly due to the difference of their ability of selenate uptake.
出处
《大豆科学》
CAS
CSCD
北大核心
2002年第4期263-266,共4页
Soybean Science
基金
科技部 973项目 (G19990 1180 8-3 )
国家教委博士点基金项目 (2 0 0 0 0 3 0 713 )
江苏省科委项目 (BE -993 15 )
