摘要
以前期田间试验筛选出的富硒能力较强的水稻品种捷丰优629和谷丰优8312为材料,采集硒含量不同的稻田土壤,通过盆栽试验进一步研究了两个水稻品种对土壤硒的吸收、分配及其糙米和精米中无机硒与有机硒含量的组成特点。结果表明:两个水稻品种植株的硒累积量、糙米和精米的硒含量与有机硒含量都是高硒土壤极显著高于低硒土壤,表明高硒土壤有利于稻米硒的累积与有机硒的合成,因此生产优质富硒大米最好选择硒含量较高的稻田土壤。无论在高硒土壤还是低硒土壤上,捷丰优629植株中硒累积量和籽粒中硒累积量与谷丰优8312的差异都不显著,但捷丰优629的糙米和精米中硒含量以及有机硒含量都极显著高于谷丰优8312,表明捷丰优629吸收的硒易分配到可食用部位(糙米和精米),而且其无机硒向有机硒的转化能力较强,因此综合比较来看捷丰优629富硒特性优于谷丰优8312。
Pot experiment was conducted in paddy soils with high and low selenium（Se） contents to study Se uptake and distribution and composition of inorganic and organic Se contents of brown and milled rice of two rice cultivars （Jiefengyou629 and Gufengyou8312） that had been selected from field experiment previously. The results showed that the accumulation amounts in rice plant and Se contents and organic ones in brown and milled rice of two rice cultivars were more in high Se content soils than in low ones, which indicated that high Se content paddy soils was contributed to Se accumulation and composition of organic Se. Therefore Se-enriched rice cultivars had better plant in high Se content paddy soils to obtain high quality Se-enriched rice. Whether in high or low Se content soil, the difference of Se accumulation amounts in plant or grain between two rice cultivars was not significant. But Se content and organic Se content in brown and milled rice of Jiefengyou629 were higher than those of Gufengyou8312, which suggested that Se absorbed by Jiefengyou629 was easily distributed to edible parts （brown and milled rice） and inorganic Se of brown and milled rice was also easily changed into organic one. Therefore, the characteristics of Se uptake and distribution of Jiefengyou629 was better than those of Gufengyou8312.
出处
《土壤》
CAS
CSCD
北大核心
2014年第1期66-69,共4页
Soils
基金
"211工程"热带作物遗传育种与生态保育创新人才培养基金青年教师项目(QNJS-2011-14)
海南省自然科学基金项目(808105)资助
关键词
水稻品种
土壤硒
吸收
分配
无机硒
有机硒
Rice cultivar, Se content in soil, Uptake, Distribution, Inorganic Se, Organic Se
