摘要
作物生产的最主要的过程就是光合产物的积累、分配、转移及最终经济产量的形成。为研究环境条件和栽培管理对这一过程的动态影响 ,1998至 1999年 2年共进行了 19个处理的田间试验 ,系统地测定了不同播期、不同密度、不同施肥、灌溉水平以及不同含盐量的灌溉水质下 ,包括地下部分的夏玉米各器官干物质动态。本文以有效积温表示的相对发育期为时间变量 ,分析了各处理下干物质积累、分配和转移的动态变化 ,并比较了最终产量水平及收获指数。
Accumulation, partitioning and translocation of assimilates among plant organs are key processes that condition maize yield. Consequently, these processes are of great interest to agronomists and modelers of crop growth. Field experiments including 19 treatments of summer maize with different sowing dates, planting density, fertilizer use, irrigation scheduling and even different irrigation water quality (salinity) were conducted during the 1998～1999 maize seasons. Plant dry matter, separated into roots, stems and storage organs was collected in partial harvests at about 10 days intervals during the growing seasons. Actual yield, yield components and harvest index (HI) were recorded and compared among the treatments. A growing degree day (GDD) based relative development stage (RDS) was introduced to describe development dynamics and maintenance respiration costs of live plant organs; RDS was also used in calculations of assimilate partitioning and translocation coefficients.
出处
《作物学报》
CAS
CSCD
北大核心
2002年第1期104-109,共6页
Acta Agronomica Sinica
基金
荷兰 SAIL基金会的中荷合作项目"可持续土地管理 (SUL AMA)"(SAIL -SPP 2 99.3 99)
国家重点基础研究发展规划项目(G19990 1170 9)资助
