Abstract: In order to study the effects of spacing form and planting density on grain yield and population quality,an experiment by split plot designs was hold with a winter wheat cultivar Henong 822.The experiment included three spacing forms such as 15 cm,20 cm and 16.7 cm+16.7 cm+26.7 cm and four planting density such as 180×104 basic seedlings per hectare,300×10⁴ basic seedlings per hectare,420×10⁴ basic seedlings per hectare and 540×10⁴ basic seedlings per hectare.The results showed that the interaction between spacing form and planting density was not significant.The grain yield,population total stems number,leaf area index and dry matter accumulation were almost the highest under the treatment of 15 cm,followed by row spacing of 20 cm and 16.7 cm+16.7 cm+26.7 cm.On the other hand,the leaf area index,dry matter accumulation and grain yield of 300×104 basic seedlings per hectare was almost the highest,followed by 420×10⁴ basic seedlings per hectare,180×10⁴ basic seedlings per hectare,and 540×104 basic seedlings per hectare.The population total stems number increased with the adding of basic seedlings.And the population total stems number of treat of 540×10⁴ basic seedlings per hectare was the highest,followed by 420×10⁴ basic seedlings per hectare,300×104 basic seedlings per hectare,and 180×104 basic seedlings per hectare.To get higher yield,the optimum spacing form and density on henong 822 were 15 cm and 300×104 basic seedlings per hectare.

Key words: Spacing form, Density, Henong 822, Population quality, Cain yield

CLC Number: 

• S512.104