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Population Characteristics of High-Yielding Rice under Different Densities

文献类型： 外文期刊

作者： Li, Ganghua 1 ; Zhang, Jun 2 ; Yang, Congdang 1 ; Liu, Zhenghui 1 ; Wang, Shaohua 1 ; Ding, Yanfeng 1 ;

作者机构： 1.Nanjing Agr Univ, Key Lab Crop Physiol & Ecol Southern China, Jiangsu Collaborat Innovat Ctr Modern Crop Prod, Natl Engn & Technol Ctr Informat Agr, Nanjing, Jiangsu, Peoples R China

2.Chinese Acad Agr Sci, Inst Crop Sci, Zhongguancun South St 12, Beijing 100081, Peoples R China

3.Yunnan A

期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）

ISSN： 0002-1962

年卷期： 2016 年 108 卷 4 期

页码：

收录情况： SCI

摘要： To explore the common characteristics of high-yield rice (Oryza sativa L.) production and the influence of transplanting density on yield, field experiments were conducted in eight ecological zones with local popular high-yield rice varieties in China in 2009. This study revealed that different ecological types of rice exhibit robust differences in growth stage, yield composition, source, sink, grain/leaf ratio, plant type traits, and dry matter (DM) accumulation and partitioning. The different ecological types of rice displayed the following common features: (i) grain yield was correlated with sink such that larger sink was always associated with larger yield; (ii) DM accumulation before and after the heading stage showed large variation in contribution to yield regardless of DM accumulation enhancement, especially for postheading accumulation, which was beneficial for increasing yield; and (iii) under the suitable seedling population (36 seedlings m(-2) or 25 seedlings m(-2)), wide rows with narrow within-row plant spacing was conducive for building high-yield populations. Overall, transplanting density and ecological site both have significant effects on rice yield, source-sink relationship, and DM accumulation.

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