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以同一回交群体中8个基因型组配的测交种为材料,在种植密度分别为60 000株/hmMD)和75 000株/hmHD)的条件下,对其生物量、产量及养分积累量进行分析。结果表明,随种植密度的增加,基因型L105、L132、L224的生物量和产量显著降低,降低幅度分别为16.6%26.1%和6.5%29.3%基因型L160、L219的生物量和产量则显著增加,平均为15.3%和19.0%。从养分累积情况来看,随种植密度的增加,基因型L105、L132、L224的氮磷钾养分积累量显著降低,降幅分别为17.0%26.2%、14.3%30.8%、16.0%29.4%基因型L160的氮素积累量随密度的增加显著增加,基因型L109与L219对钾素的积累量随着种植密度的增加分别增加21.0%、29.0%。综合生物量、产量及养分积累量来看,基因型L105、L132、L224耐密性不强,基因型L160、L219的耐密性较好。
Under the conditions of the tested hybrids with the eight genotypes in the same backcross population, the biomass, yield and nutrient accumulation were observed under the planting density of 60 000 plants / hmMD and 75 000 plants / hmHD respectively The amount of analysis. The results showed that the biomass and yield of L105, L132 and L224 genotypes decreased significantly with increasing planting densities, with the decreasing rates of 16.6%, 26.1% and 6.5%, respectively. The biomass and yield of L219 increased significantly , Averaging 15.3% and 19.0%. With the increase of planting density, the accumulation of NPK nutrients of L105, L132 and L224 decreased significantly by 17.0%, 26.2%, 14.3%, 30.8%, 16.0% and 29.4%, respectively The accumulation of nitrogen increased significantly with the increase of density. The accumulation of potassium by genotypes L109 and L219 increased by 21.0% and 29.0% respectively with the increase of planting density. Comprehensive biomass, yield and nutrient accumulation point of view, genotypes L105, L132, L224 tightness is not strong, genotypes L160, L219 good confidentiality.