关键词: 研究, 研究

Abstract: ‘Luoyu 863’ is Luoyang Academy of Agricultural-Forestry Sciences breeding a high starch type corn varieties, in order to the varieties of high yield cultivation and provide theoretical basis for demonstration and promotion, through the use of field point singling sampling and formula method, the varieties of group dynamic index, in order to clarify the appropriate group production structure and population dynamic target for varieties of high yield cultivation and provide theoretical basis for demonstration and promotion. The results showed that: ‘Luoyu 863’ suitable planting density of 60000 plants/hm2, production structure for 60000 ear/hm2, row number per ear 15.0, kernel number of per row 37.5, 1000 kernels weight 381.5 g, group productivity gets a full play, yield of 12599.4 kg/hm2. Suitable density, the group dynamic index development coordination, leaf area index (LAI) in spinning stage maximum of 5.41, and the stationary phase long, mature was 2.94, make the ‘Luoyu 863’ live stalk mature advantages to get fully embody. The amount of leaf area duration (LAD) reached 335.46×104 m2?d/hm2, in various growing period of distribution were more reasonable. Net assimilation rate and leaf area duration coordination was better. Dry matter accumulation amount 24702.3 kg/hm2, including silking stage after the dry matter accumulation accounted for 60% of all accumulation. Population growth rate (CGR) 247.0 k /(hm2?d). Grouting rate always stay in the reasonable a higher level. Silking stage after the leaf area index (LAI), leaf area duration (LAD), dry matter accumulation and population growth rate (CGR) and the grain yield is closely positive correlation, and can be used as a suitable group of mark.