膜下滴灌水稻基因型耐缺铁性评价

发布时间：2018-06-22 08:34

本文选题：水稻 + 膜下滴灌　；参考：《植物营养与肥料学报》2017年03期

【摘要】：【目的】新疆生产建设兵团采用膜下滴灌技术后,水稻缺铁黄化现象较为严重,研究该条件下水稻对缺铁反应的基因型差异,可为耐缺铁性水稻基因型的筛选和分类提供可靠的理论依据。【方法】以六个水稻基因型为研究材料,采用膜下滴灌技术管理。在水稻幼苗期、分蘖期和成熟期随机采样,测定不同基因型水稻的分蘖数、生物量、产量以及铁含量,利用隶属函数分析和聚类分析研究了水稻在全生育期对缺铁胁迫反应的基因型差异。【结果】水稻在幼苗期、分蘖期和成熟期对缺铁的反应存在基因型差异。在幼苗期水稻基因型T-04和T-05的叶片活性铁含量显著低于其他基因型;T-201在幼苗期叶片活性铁、地上部铁的分配,分蘖期叶片铁含量和地上部干物质均较高;在分蘖期T-04铁的转移能力最小,但是T-04的分蘖数较高;在成熟期T-04的有效分蘖与其他基因型差异不显著,T-04的产量处于中等水平,但是其籽粒铁的收获指数低于其他基因型水稻。聚类分析显示耐缺铁水稻基因型T-43的各指标高于其他基因型。【结论】在水稻的幼苗期和分蘖期叶片铁的有效利用和自身铁的转移保证了水稻的生长和较高有效穗数,根据全生育期水稻铁营养效率和产量的基因型差异初步确定T-43耐缺铁能力较强,T-04为对缺铁敏感的水稻基因型。
[Abstract]:[objective] to study the genotypic difference of rice response to iron deficiency in Xinjiang production and Construction Corps after adopting drip irrigation under film, the phenomenon of iron deficiency in rice was more serious. [methods] six rice genotypes were used as research materials, and drip irrigation under film was used to manage them. The tiller number, biomass, yield and iron content of different genotypes of rice were measured by random sampling at seedling stage, tillering stage and mature stage. Using membership function analysis and cluster analysis, the genotypic differences of iron deficiency responses in rice at the whole growth stage were studied. [results] there were genotypic differences in rice responses to iron deficiency at seedling stage, tillering stage and mature stage. The active iron contents in leaves of rice genotypes T-04 and T-05 at seedling stage were significantly lower than those of other genotypes, such as leaf active iron, aboveground iron distribution, leaf iron content and aboveground dry matter at tillering stage. At tillering stage, the transfer ability of T-04 iron was the least, but the tiller number of T-04 was higher, and the yield of T-04 was not significantly different from that of other genotypes at mature stage, but the yield of T-04 was lower than that of other genotypes. Cluster analysis showed that the indexes of T-43 genotype were higher than those of other genotypes. [conclusion] the effective utilization of iron in leaves and the transfer of iron in leaves at seedling and tillering stages of rice ensured the growth of rice and the number of effective panicles. Based on the genotypic differences of iron nutrient efficiency and yield in rice at the whole growth stage, it was preliminarily determined that T-43 had stronger iron tolerance than T-04, and that T-04 was a rice genotype sensitive to iron deficiency.
【作者单位】：石河子大学农学院;
【基金】：国家863计划资助项目(2011AA100508) 国家自然科学基金资助项目(31471947)资助
【分类号】：S511

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