Comparative study of physiological parameter and grain yield on different sunflower hybrid populations
Field experiment was conducted to study the physiological parameter and grain yield on 3 sunflower hybrid populations. Result showed that leaf area index were developed very fast. The time of the max leaf area index were at 51 d after seedling emergence. The leaf area index varied with different sunflower hybrids with a range of 3.57 ～ 5.64. Biological yield and grain yield had significant positive correlation with the photosynthesis potential of the population. The average net photosynthetic rates were 5.08 to 7.02g/m2 · d, and varied with different sunflower hybrids and years. The trends of biological yield accumulation were "fast - slow - fast", and conformed to the Logistic equation model. Distribution ratio of biomass in various organs was stem (grain) ＞ grain (stem) ＞ leaf ＞head ＞ petiole. The average percentages of grain ( economical index) were 29.7％ and 34.4％ in two years. The economical index of early maturity sunflower was higher than that of middle maturity sunflower.
国家科技期刊平台
NSTL
万方数据
维普
