Wheat yield components vary between different ecological regions and yield levels. Grain number responses to pre-anthesis dry matter (DM) and nitrogen (N) in increasing yield were always investigated in spike organs, neglecting the effect of non-spike organ nutrition or overall distribution. This paper determined the relationships between grain number and pre-anthesis DM and N in spike and non-spike organs under different yield levels, with using two sorts of field experiments (different water-nitrogen modes and cultivation management patterns) from 2012-2015 in Huang-Huai plain. The results indicated that improving yield under yield of < 7500 kg ha-1 depends on increasing grain number per spike (GNs) or spike number (SN) or both, increased yield under higher yield of > 7500 kg ha(-1) mainly depends on GNs. GNs showed significant positive relationships with above-ground DM accumulation from jointing to anthesis under high or low yield levels. Rapid DM growth in spring achieves higher GNs. Spike and non-spike DM and N contents both demonstrated strong positive relationships with GNs, spike DM distribution also shows a positive correlation, but spike N distribution ratio show negatively correlation with GNs. Improved N distribution in non-spike organs and DM partition in spike organs conduce to increasing GNs.
机构:
INRA, UMR 1091, INRA INAPG Environm Grandes Cultures, F-78850 Thiverval Grignon, FranceINRA, UMR 1091, INRA INAPG Environm Grandes Cultures, F-78850 Thiverval Grignon, France
机构:
Univ Austral Chile, Grad Sch, Fac Agr Sci, Valdivia, Chile
Univ Austral Chile, Inst Plant Prod & Protect, Valdivia, ChileUniv Austral Chile, Grad Sch, Fac Agr Sci, Valdivia, Chile
Bustos, Daniela V.
;
Hasan, Ahmed K.
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机构:
Univ Austral Chile, Grad Sch, Fac Agr Sci, Valdivia, Chile
Univ Austral Chile, Inst Plant Prod & Protect, Valdivia, ChileUniv Austral Chile, Grad Sch, Fac Agr Sci, Valdivia, Chile
Hasan, Ahmed K.
;
Reynolds, Matthew P.
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h-index: 0
机构:
Int Maize & Wheat Improvement Ctr CIMMYT, Global Wheat Program, Mexico City 06600, DF, MexicoUniv Austral Chile, Grad Sch, Fac Agr Sci, Valdivia, Chile
Reynolds, Matthew P.
;
Calderini, Daniel F.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Austral Chile, Inst Plant Prod & Protect, Valdivia, ChileUniv Austral Chile, Grad Sch, Fac Agr Sci, Valdivia, Chile
机构:
INRA, UMR 1091, INRA INAPG Environm Grandes Cultures, F-78850 Thiverval Grignon, FranceINRA, UMR 1091, INRA INAPG Environm Grandes Cultures, F-78850 Thiverval Grignon, France
机构:
Univ Austral Chile, Grad Sch, Fac Agr Sci, Valdivia, Chile
Univ Austral Chile, Inst Plant Prod & Protect, Valdivia, ChileUniv Austral Chile, Grad Sch, Fac Agr Sci, Valdivia, Chile
Bustos, Daniela V.
;
Hasan, Ahmed K.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Austral Chile, Grad Sch, Fac Agr Sci, Valdivia, Chile
Univ Austral Chile, Inst Plant Prod & Protect, Valdivia, ChileUniv Austral Chile, Grad Sch, Fac Agr Sci, Valdivia, Chile
Hasan, Ahmed K.
;
Reynolds, Matthew P.
论文数: 0引用数: 0
h-index: 0
机构:
Int Maize & Wheat Improvement Ctr CIMMYT, Global Wheat Program, Mexico City 06600, DF, MexicoUniv Austral Chile, Grad Sch, Fac Agr Sci, Valdivia, Chile
Reynolds, Matthew P.
;
Calderini, Daniel F.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Austral Chile, Inst Plant Prod & Protect, Valdivia, ChileUniv Austral Chile, Grad Sch, Fac Agr Sci, Valdivia, Chile