抛秧水稻生长发育与产量形成的生态生理机制 Ⅱ.秧苗田间垂直分布格局及其生态生理效应  

The Eco-physiological Mechanism of Growth, Development and Yield Formation of Broadcasted Rice Seedlings Ⅱ. The Characteristics of Spatial Distribution of Plant on Perpendicular and Its Eco-physiological Effect

作　　者：戴其根[1] 霍中洋[1] 张洪程[1] 苏宝林[2] 许轲[1] 邱枫[1] 

机构地区：[1]扬州大学农学院,江苏扬州225009 [2]中国农业大学,北京100094

出　　处：《作物学报》2001年第5期600-611,共12页Acta Agronomica Sinica

基　　金：江苏省"九五"应用攻关项目 (BE96 318) ;国家自然科学基金资助 (30 0 70 436 )

摘　　要：抛秧稻秧苗在田间垂直方向上浅栽而变异大的特点 (- 0 .5～ 2 .5 cm)使分蘖节入土状况不同 ,秧姿各异。同时 ,浅栽后 ,分蘖节及土中茎鞘周际环境发生深刻变化 ,总体上温、肥、气、压 (受土壤压力 )等生态因素改善 ,但因分蘖节处于土 -水 -气的交界层面上 ,这些生态因素在这个层面上变化大 ,使水稻生长受这些因素胁迫机率大。分蘖节入土状况在活棵立苗及叶、蘖、根等器官生长上产生了一系列显著的效应 ,影响着群体的发展、整齐度、抗倒性及最终产量。分蘖入土最适宜深度 1.5 cm左右 ,过浅过深不利于个。Spatial distribution of plant positions in the perpendicular is one of primordial foundational characteristics in the broadcasting seedling of rice. Planting depth is characterised with shallow and various(-0.5～2.5cm). So crown(tiller nodes) inserted into the soil shallowly and variously in depth and the seedling postures are diversified after transplanting. The environment around crown or stem in soil are changed remarkablily. In general, some ecological factors around crown included temperature, nutrient, air, bind force of soil and so on are improved. But these factors fluctuate notably because the crown lies on soil water air boundary layer. So stress chances of rice growth may be underwent increasely from these factors. The depths of crown in soil strongly influence the growing of organ included leaf, tiller and root and the developing of population included uniformity, lodging and yield. The optimal depth of crown is about 1. 5 cm.

关 键 词：抛秧稻 分蘖节 垂直分布格局 生长发育 产量形成 生理效应 生态效应 

分 类 号：S511[农业科学—作物学]