Under field experiments and pot experiments,two winter wheat cultivars were planted in growth season during 2006-2008 at Henan Agricultural University research station,which were large spike cultivars“Lankaoaizaoba”(L-8) whose ear formation rate from tillers is low and multi spike cultivars“Yumai 49-198”(Y-49) whose ear formation rate from tillers is high. Three different plant density levels were used in the experiments, the difference of carbon and nitrogen metabolism between main stem and tillers...
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