Effect of Drip Application of Uniconazole Compound Promoter on the Growth,Development,Yield and Quality of Cotton
This study investigated the effects of drip application of uniconazole compound promoter on cotton agronomic traits,dry matter accumulation and distribution,yield and quality,to provide certain reference for promoting the development of cotton cultivation towards light simplification and intensification.The cotton variety Xinluzao 42 was used as the field test material,foliar spraying of acetamiprid was used as the control(CK),and drip application of uniconazole was set up compounded with thidiazuron(T1),diethyl aminoethyl hexanoate(T2),naphthylacetic acid(T3),and clopidourea(T4)in four combinations of chemicals,which were applied once at the time of chemical topping of cotton,so as to compare the effects of drip-applied aliconazole compound promoter on the agronomic traits,the accumulation and distribution of dry matter,the yield,and the quality of cotton plants.The results showed that drip application of aliconazole compound promoter could control cotton plant height and fruit branch growth,the height of cotton plant in T1 treatment was significantly reduced by 2.47 cm,2.17 cm and 2.34 cm compared with CK at 14,21 and 28 d after application,respectively,and the length of the third,sixth and ninth fruiting branches was significantly shortened by 20.0%,20.7%and 36.7%compared with CK respectively.The height of cotton plant in T2 treatment was significantly reduced by 0.74 and 1.27 cm at 14 and 21 d after application,and the difference with CK was not significant at 28 d after application,and the length of the third,sixth and ninth fruiting branches was shortened by 9.1%,12.0%and 36.6%respectively compared with CK,and the dry matter accumulation of buds and bolls was increased by 7.32%and 19.13%respectively compared with CK at 40 and 50 d after application,and the proportion of its reproductive organs increased by 6.09%and 4.94%respectively compared with CK.Among the four drip treatments,the number of bolls per plant in T2 treatment was the highest,which was significantly increased by 3.28%compared with CK,and the lint percentage was relatively higher,and the lint yield was as high as 3 294.77 kg/ha,which was significantly increased by 8.10%compared with CK.There was no significant difference in fiber quality among different treatments.In conclusion,drip application of uniconazole compounded with diethyl aminoethyl hexanoate is effective in improving agronomic traits,dry matter accumulation and distribution in reproductive organs,number of bolls per plant and yield of cotton.
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