不同育苗时期对向日葵生长发育及产量的影响

Effects of Different Breeding Periods on Growth and Yield of Sunflower

春小麦收割后复种向日葵(向日葵育苗移栽)较小麦单作具有明显的增效优势。不同育苗时间相比较,育苗时间早,株高、茎粗和叶片数增加,千粒重增加。相同育苗时间,不同品种间株高、茎粗、千粒重差异显著。实验结果表明:向日葵复种生产,要选择优势品种并确定适宜的育苗时间和移栽时间。提早育苗并移栽,延长了向日葵生育期,产量增加29.01%-48.85%;不同密度处理,DK909和LH135产量之间差异极显著。

Double cropping sunflower after harvesting spring wheat has obvious efficiency advantages than wheat monocropping. According to different breeding time, earlier breeding has the advantages of high plant, thick stem, increasing of the numbers of leaves and grain weight, etc. Seedlings compared to the same time have huge differences in plant height, Stem diameter, grain weight among different cultivars. The experiment results show that if the sunflower multiple cropping is successfully carried out, the choice of dominant species has to be made and the time for appropriate breeding and seedling transplanting is also needed. Early breeding and seedling transplanting extend sunflowers’ growing period and increase yield by 29.01%~48.85%; different density treatments lead to significant difference in yield between DK909 and LH135.