Two winter wheat cultivats, Yumai49-198(a multag spike type) and Lankaoaizao8(a large- spike type) were used to investigate the effect of planting densities on the accumulation and tranlation of dry matter and nitrogen and the grain yield. The results indicated that the remobilization rate of pre-anthesis assimilates and nitrogen was higher in lower dennity treatment. The highest remobilization rate of assimilates before anthesis was from stem and sheathes, while the highest remobilization rate of nitrogen was from leaves. After anthesis, the C 1 treatment had the highest transferring amount of assimilates and nitrogen to grain for large-spike type, and the B3 treatment for multagspike type.The contribution of assimilates to grain weight was higher in lower density before anthesis, but it was higher in higher density after thesis. The contribution of reserved nitrogen to grain protein was higher in middle density treatments for Lankaoaizco 8 and in lower density treatments for Yumai 49-198. The highest value of grain yield, starch and protein was observed on C2 treatment for Lankaoaizao 8 and B2 for Yumai 49-198.
GUO Tian-cai
,
ZHA Fei-na
,
MA Dong-yun
,
SONG Xiao
,
YUE Yanjun
. Effects of Plant Density on the Accumulation and Transfer of Dry Matter and Nitrogen and Grain Yield of Two Winter Wheat Cultivars with Different Spike Types[J]. Acta Agriculturae Boreali-Sinica, 2007
, 22(6)
: 152
-156
.
DOI: 10.7668/hbnxb.2007.06.031
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