Effects of seaweed fertilizer on nutrient uptake and transport in loquat seedlings
To explore the effect of seaweed fertilizer on nutrient uptake and transport in loquat seedlings,this study investigated the effects of different dilution ratios of seaweed fertilizer on nitrogen,phosphorus and potassium uptake and transport.The biomass,total N,total P and total K contents in the roots,stems,leaves and aboveground parts of loquat seedlings were increased by spraying different concentrations of seaweed fertilizer,and the contents of them first increased and then decreased with increasing seaweed fertilizer dilution ratio.The application of seaweed fertilizer improved the uptake,transfer volume,transfer efficiency and transfer contribution rate for N,P and K in each part of the loquat seedlings and the 650 times diluted seaweed fertilizer showed optimal results.Furthermore,different concentrations of seaweed fertilizers increased N harvest index in the aboveground parts of loquat seedlings and P harvest index in the roots of loquat seedlings.In addition,soil alkali-hydrolysed N,available P and available K contents increased and soil pH value decreased after spraying seaweed fertilizer.Correlation analysis revealed significantly positive correlations between loquat seedlings biomass and total N,P and K contents with soil alkali-hydrolysed N,available P and available K contents.The uptake and transport of N,P and K in loquat seedlings were enhanced by spraying seaweed fertilizer,the optimum concentration being 650 times dilution.
seaweed fertilizerloquat seedlingsnutrient uptake and transport
万方数据
维普
