Effects of Smearing NAA or not after Decapitation on Cotton Root Activity and Nutrition Uptake
[Objective] A field experiment was conducted to illustrate the effect of decapitation (a conventional technique in cotton cultivation in Xinjiang) on cotton root activity and nutrition uptake.[Method] The root activity and nutrition uptake was investigated after decapitation or decapitation with NAA-smearing under 0 or 375 kg/ha diammonium phosphate (DAP) applications.[Result] Compared with that of decapitation with NAA-smearing under 0 DAP application,root activity and concentrations of nitrogen (N),phosphorus (P) and potassium (K) in cotton leaves increased 4 days after decapitation,while these indicators decreased when 9 days after decapitation.Compared with that of 0 DAP application,root activity and concentrations of N,P,K increased both 4 and 9 days after decapitation and decapitation with NAA-smearing with DAP application.Similar increments were observed on boll number of single plant,weight per boll and seed cotton yield per plant.Compared with that of 0 DAP application,boll number of single plant,weight per boll and seed cotton yield per plant increased by 43.2％,26.0％ and 80.6％ respectively after decapitation and 46.0％,3.1％,50.5％ after decapitation with NAA-smearing.[Conclusion] Under DAP application,both decapitation and decapitation with NAA-smearing could improve root activity,promote nutrition uptake and increase cotton yield.
国家科技期刊平台
NSTL
万方数据
维普
