超级杂交水稻的物质生产特征及其与产量表现的关系

摘要/Abstract

摘要： 【研究目的】以江苏省育成的两个重要的超级杂交水稻组合为材料，观察了在江苏省生态条件下超级杂交稻的物质生产及产量表现特征，分析了超级杂交稻组合产量潜力发挥的限制因子。【结果】结果显示，杂交稻组合不论在常规密度还是在稀植条件下均表现出较好的生产能力，其产量优势主要体现在大穗特征，但结实性未见明显改善，结实率偏低。常规高产品种在常规密度下也表现出较高产量水平，但在稀植条件下产量大幅下降。超级杂交稻的物质生产能力较汕优63有一定提高，特别是生育后期物质生产能力显著增强，明显改善了杂交稻抽穗后物质生产能力弱的劣势。无论正常密度还是稀植条件，超级杂交稻茎鞘物质运转率无明显变化，显示出明显的类型特征。【结论】从以上结果可知，超级杂交稻实现产量进一步提高的关键，在于确保较高的群体颖花量的前提下，增加结实期物质生产，实现结实率的突破。适当降低密度，可增加结实期的物质生产量，从而达到改善结实特性的效果

关键词: 引进花卉, 引进花卉, 检疫, 存在问题, 监管措施

Abstract: 【OBJECTIVE】Boss biomass production and yield formation characteristics were observed using two super hybrid rice combinations bred in Jiangsu Province, the factors limiting yield potential in super hybrid rice was studied. 【RESULTS】The results showed that, super hybrid rice had good production capacity either at common density or low density. High yield was mainly attributable to the big panicles. But the seed setting characteristics were not promoted observably and the percentage of ripened grain was lowly level yet. Conventional variety used as contrast also showed high yield at common density, but low yield at low density. The biomass production of super hybrid rice, particularly that after heading was remarkably higher than that of Shanyou 63, the weakness in biomass production of normal hybrid rice was improve obviously. The translocation rate of storage carbohydrate in stem and sheath of super hybrid rice had no significant changes compared with common and low density, the translocation type was showed significantly. 【CONCLUSION】The key points to further improve in conclusion, yield is to make a breakthrough in seed setting characteristics under the conditions of higher total spikelet number has been obtained, to improve significantly the percentage of ripened grain. Relatively condign low density may increase the biomass production after heading and improve the seed setting characteristics.

中图分类号:

谢成林,张祖建,潘美红,张菊芳. 超级杂交水稻的物质生产特征及其与产量表现的关系[J]. 中国农学通报, 2007, 23(9): 74-74.

Xie Chenglin, Zhang Zujian, Pan Meihong, Zhang Jufang. Study on the Characteristics of Biomass Production and the Relationship to Yield in Super Hybrid Rice[J]. Chinese Agricultural Science Bulletin, 2007, 23(9): 74-74.

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