灌浆期气温与源库强度对稻米品质的影响及其生理分析  

Physiological effects of air temperature and sink-source volume at milk-filling stage of rice on its grain quality.

作　　者：陶龙兴[1] 王熹[1] 廖西元[1] 沈波[2] 谈惠娟[1] 黄世文[1] 

机构地区：[1]中国水稻研究所/水稻生物学国家重点实验室,杭州310006 [2]杭州师范学院生命科学学院,杭州310012

出　　处：《应用生态学报》2006年第4期647-652,共6页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(30070505);农业部跨越计划项目(2005-01);浙江省重大科技攻关资助项目(2004C22002;2004C32016;2005C22019).

摘　　要：利用自然条件下的早、晚季种植作为温度处理,选择米质低、中、优等级的6个水稻品种(组合)作为供试材料,研究了早、晚季种植下的稻米品质、淀粉分支酶活性变化,以及温度处理间的差异.结果表明,在籽粒灌浆初期,高温环境下灌浆充实的籽粒,其稻米的垩白增加、透明度变差、整精米率下降,对出糙率及精米率没有明显影响.与早季种植的稻米相比,晚季种植稻米的胶稠度、整精米率、透明度增加.早、晚季种植对稻米直链淀粉含量、蛋白质含量等没有显著影响.剪叶限源处理显著降低稻米质量,疏粒减库处理显著提高稻米品质.This paper studied the grain quality and Q-enzyme activity of three rice varieties and their combinations as affected by air temperature and sink-source volume. The results showed that at the early stage of milk filling, the grains of fully milk filling under high temperature had a higher chalkiness, lower transparency, and lower rate of white rice. Compared with the grain of early-rice, that of late rice had higher gel consistency and transparency, and higher rate of white rice, Planting rice at early-or late season had no significant effect on the amylose and protein contents of rice grain, Leaf-cutting to limit source decreased grain quality markedly, while grain-thinning to decrease sink improved grain quality significantly.

关 键 词：水稻 高温 源库强度 Q酶活性 稻米品质 

分 类 号：S511[农业科学—作物学]