Effects of Different Boll -Setting Positions and Stages on Seed Vigor of Cotton
Zhang Wenqiang
Liu Guangtao
Liu Shuhai
Li Yan
Wu Chenglai
Zhang Chunqing
Abstract：In order to clear the effect factors on cotton seed vigor,taking SCRC 28 and Yinxingmian 4 as materials,the vigor of seeds reapped in different planting densities,boll -setting positions and stages was de-terminated.The results showed that the healthy seed rate of summer boll was higher than that of pre -summer and autumn bolls.The healthy seed rate of the first and central fruit branches was higher than that of twig fruit branch.There was highly positive correlation of healthy seed rate with seed vigor.The seed vigor of summer boll was the highest,followed by that of pre -summer boll,that of autumn boll was the lowest.In the medium planting density,the seed vigor of the first fruit branch was the highest,followed by that of the central fruit branch.In the higher planting density,the seed vigor of the central fruit branch was the highest,followed by that of the first fruit branch.With the increase of planting density,the seeds with high vigor had the tendency of moving toward the central fruit branch.The mid -early maturity varieties were more sensitive to the reaction of seed vigor to planting density than mid -late maturity varieties.It was suitable to harvest the seeds from summer boll on the central fruit branch to product the high vigor seeds.And it was an effective way to improve seed vigor through increasing the healthy seed rate by mechanical processing.
Keywords：CottonSeed vigorBoll -setting positionBoll -setting stage
Publication Date：2016-11-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：4( 76-79 )