Effects of seed soaking with exogenous substances on the growth,development,yield and quality of cotton exposed to cold damage at the seedling stage
In this experiment,'Zhongmian 113'was used as the test variety.After the cotton was soaked with trehalose,melatonin and ascorbic acid,the differences of seedling formation,main agronomic traits,biomass accu-mulation,yield,constituent factors and main fiber quality traits of cotton treated with the three exogenous sub-stances were compared.The results showed that compared with CK treatment,the seedling formation rate of cotton treated with exogenous substances was significantly increased by 1.3％～6.1％.Plant height,stem diameter and branch number were significantly increased by 8.1％～9.2％,10.1％～14.6％and 13.7％～22.2％.The biomass in-creased by 1.6％～20.9％,and the distribution ratio of biomass in the reservoir increased by 3.3％～16.4％.The yield of seed cotton was significantly increased by 11.7％～18.4％.The average length and breaking strength of the upper half of the cotton fiber were above 29 mm and above 29 cN·tex-1,and the Micronaire was grade B.In sum-mary,seed soaking treatments with exogenous substances significantly improved the seedling formation rate,promo-ted the growth and development of cotton plants,enhanced biomass accumulation and distribution,and increased yield,with the 100 μmol·L-1 melatonin treatment having the most pronounced effect.
cottonseed soaking with foreign substancescold damagegrowth and developmentyieldquality
万方数据
维普
