Abstract: Effects of plant density on dry matter accumulation and grain filling were studied in East Jilin Province. Maize cultivars Xianyu 335 and Nonghua 101 were used. Plant density significantly affected grain yield,dry matter accumulation and grain filling characteristics,but two cultivars showed different responses. Ears number and bare plant rate increased,while the yield and dry matter per plant-grain number per ear decreased significantly with the increase of plant density. Additionally, population yield,total dry weight and post-kilking dry matter were different between cultivars. Grain yield of Nonghua 101 increased with the increase of plant density, while total dry matter showed no reaction to plant density, and post-kilking dry matter decreased firstly and then increased with the increase of plant density. On the contrary,grain yield of Xianyu 335 decreased with the increase of plant density, while total dry matter and post-kilking dry matter increased. With the increase of plant density, stem and leaf dry weight per plant reduced,and the maximum leaf dry weight occurrence time delayed,the amount of dry matter translocation was firstly increased and then decreased. Plant density had greater effect on 100-kernel weight by maximum filling rate,average filling rate and the beginning of linearity filling phase,while effect on maximum filling period and grain filling duration was little.

Key words: Plant density, Dry matter accumulation, Grain filling

CLC Number: 

• S513.04