寒地水稻高产群体产量构成因素分析

通过对不同肥密因素构成的60个质量群体进行调查。结果表明:寒地水稻高产群体有效穗数集中在450万~495万穗.hm-2,穗粒数应控制在90~130粒,在此限度内,穗粒数对产量影响不明显;产量构成因子在不同产量群体中表现不同,在高产群体中表现为结实率穗粒数穗数粒重;在中产群体中表现为穗数穗粒数结实率粒重;在低产群体中表现为穗数结实率穗粒数粒重。

Analysis on Yield Composition Factors of Rice High Yield Population in Cold Region

The survey on 60 quality groups that different fertilizer and density factors constitute. The results showed that the investigation and analysis on 60 different groups of spike number, grains per panicle, seed setting rate,grain weight,spike number of high yield population concentrated in the 4 500- 4 950 thousand per hectare, the grain number per spike of high yield population should control in the range of 90 to 130 in cold region;within this range,the effect of chang of grain number per spike on yield was not significant. The role of different yield compositon factors on different yield level rice population was different; the role of each yield compositon factors in high yield population was： seed setting rate〉grain number per spike〉spike number〉 grain weight;in middle yield population was： spike numbe〉grain number per spik〉 seed setting rate〉grain weight;in low yield population was： spike number〉 seed setting rate〉 grain number per spike 〉 grain weight.