旱种技术对水稻抽穗前群体干物质积累的影响  

Influencing of cultivation skills of growing rice on upland on the dry matter accumulation before heading period

作　　者：叶永印 谭友斌[2] 范辉[3] ABU 

机构地区：[1]贵州省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]贵州省遵义市农业局农推站,贵州遵义563000 [4]尼日利亚卡登纳州Lamda农场

出　　处：《山地农业生物学报》2008年第2期95-100,共6页Journal of Mountain Agriculture and Biology

基　　金：中国-尼日利亚国际南南合作资助项目(Tfng250004070)

摘　　要：采用三因子二次回归旋转组合设计研究水稻旱种施肥量、基肥施氮比例、播种密度对抽穗前群体干物质积累与分配的影响。结果表明,施氮量、基肥施氮比例及点播密度极显著影响抽穗前群体合成的光合物质量及其在茎、叶之间的分配。因此,适宜的施氮量、合理的肥料运筹及点播密度必将促进抽穗前群体合成适量的干物质,进而促进其由叶流向茎形成壮蘖、大穗并调控叶的生长,形成灌浆期高产群体结构以实现高产。最高产量为10.13kg/9.6m2(10.55 t/hm2)的各因子组合是:施氮量为1.6818(175.23kg/hm2)、基肥施氮比例为1.0000(80.00%)、点播密度为0.0000(25.50万窝.hm-2)。By use of three-factor, curvilinar regression of second degree and rotation combination design, the amount of nitrogen applied, the ratio of nitrogen applied in basic manure, and the sowing density influencing dry matter accumulation were studied. The results show that these three factors influence the amount of dry matter accumulated between stalks and leaves significantly before heading preiod. Thus, appropriate fertilizing method combining with a reasonable hole sowing density would promote a fight amount of dry matter accumulation before heading period, and furthermore, would impetus dry matter flows from leaves to stalks to form the stronger stalks and larger ears, and would regulate leaf grow to construct a reasonable high-yield population to realize high yield. The highest yield 10. 13kg/9.6m^2 （ 10.55 t/hm^2 ） with the different factors combination is： amount of nitrogen applied 1.6818 （ 175.23 kg/hm^2 ）, the ratio of nitrogen applied in basic manure 1. 000 0（80.00% ）, and hole sowing density 0.000 0（255 000 holes/hm^2）.

关 键 词：旱种技术 水稻 抽穗前 群体 干物质积累 二次回归旋转组合 

分 类 号：S511.01[农业科学—作物学] S511.048