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Dry Matter Accumulation, Partitioning, and Remobilization in High‐Yielding Wheat under Rice–Wheat Rotation in China
Author(s) -
Ding Jinfeng,
Zi Yan,
Li Chunyan,
Peng Yongxin,
Zhu Xinkai,
Guo Wenshan
Publication year - 2016
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj2015.0114
Subject(s) - anthesis , dry matter , agronomy , oryza sativa , yield (engineering) , sowing , grain yield , biology , poaceae , cultivar , biochemistry , materials science , metallurgy , gene
A rice ( Oryza sativa L.)–wheat ( Triticum aestivum L.) rotation system is the primary cereal planting system in China, especially in the middle and lower reaches of the Yangtze River (YR). Understanding dry matter (DM) accumulation, partitioning, and remobilization in high‐yielding wheat is essential to realize high and stable yield in this area. A field study was conducted by managing N with one high‐yielding variety ( T. aestivum L.). The data on yield components and DM accumulation, partitioning, and remobilization were collected, and then were divided into two groups according to grain yield: <9 t ha −1 as medium yield (MY) and ≥9 t ha −1 as high yield (HY). Across the 2 yr, the average grain yield in the HY group was about 10% higher than in the MY group. An increased grain yield was primarily attributed to more kernels per spike. Compared with the MY group, the HY group showed more DM accumulation from booting to maturity and at maturity, higher DM partitioning in stems and spike vegetative components at anthesis, and lower DM remobilization from leaves. Significant correlations were found between DM accumulation from booting to anthesis and kernels per spike, between DM accumulation from anthesis to maturity and spike weight, and between DM partitioning in spike vegetative components at anthesis and kernels per spike. The present study indicates that appropriate DM accumulation and suitable DM partitioning in different organs at anthesis, and consistent increases in DM production after booting could be crucial for wheat grain yield improvements.