杂交稻华优3号在尼日利亚旱种源库关系的研究  

Relations of Source-Link of Huayou 3 th (Hybrid Rice Combination)under Dry Cultivation in Northern Nigeria

作　　者：叶永印 谭有斌 Abu 杜春来[4] 

机构地区：[1]毕节地区农业科学技术研究所,贵州毕节551700 [2]四川省南充市嘉陵区农业局,四川南充637005 [3]尼日利亚Kaduna州Lamda农场 [4]辽宁省辽阳市太子河区农业技术推广中心,辽宁辽阳111000

出　　处：《种子》2008年第8期25-29,共5页Seed

基　　金：中国-尼日利亚国际南南合作资助项目"中国优质;高产;高抗杂交水稻在尼日利亚的引进筛选及旱种栽培技术研究"(Tfng250004070)

摘　　要：用三因素二次回归旋转组合设计探索旱种技术对中国杂交水稻库源关系的影响。结果表明:水稻旱种的施氮量及氮肥运筹和点播密度极显著影响灌浆期群体叶面积、群体颖花量、总实粒数及产量和粒叶比。因此适宜的施氮量、合理的氮肥运筹及点播密度必将调控抽穗期群体LAI在适宜范围内并延缓灌浆群体叶面积的衰减而保证有较大的光合叶面积、显著提高颖花量而形成较高的粒/叶比,进而增加库对光合物质需求,促进同化物质从源到库转动速率的提高,而形成"库大"、"源足"、"流畅"的高产群体而实现高产。By using of three-factor, quadratic regression rotation composite design, the Relation between resource and sinks of Chinese hybrid rice under dry cultivation were studied in Nigeria. The results indicated that in filling milk period these three factors （nitrogen application, Nitrogen Fertilization Strategy, density of spot seeding） markedly influence LAI（ leaf area index ）, quantities of colony glume-flowers, quantities of truth grain, yield, and ration of grain/leaves. It may preferably control the LAI at heading period in a suitable range and delay the decreasing of LAI at filling milk period under a design which had the suitable nitrogen applied, nitrogen fertilization strategy and density of spot seeding. This design ensured enough photosynthetic leaves and increased amount of glume-flowers and ratio of grain/leaves acreage. Therefore, a high yield colony was come into being due to the more photosynthate was needed to links and the speed of assimilative matter from source to links was improved.

关 键 词：旱种 源库关系 库大 源足 流畅 

分 类 号：S511[农业科学—作物学]