Effects of potassium applying on growth and K uptaking of mulberry trees

A study was conducted to evaluate the soil nutrient status especial for the K nutrient of mulberry trees planting area in Guangxi using soil nutrient systematic approach,and the field experiment with four levels of K were carried out to study the effects of K fertilizer on mulberry growth,yield and K uptaking characteristics.The results showed that soil K was one of the main limiting factors of nutrient on mulberry in planting area.Based on applying N and P fertilizers,the treatments with potassium fertilizer could increase the yield of mulberry leaf and the absorption of K in mulberry,and the effects of K2 treatments with 148.5kg K2O/hm2 was the highest.As compared with the control,the mulberry branches length and width,and the mulberry yield increased by 7.78cm,0.07cm and 27.73%,respectively.Therefore,in the experiment,the suitable dosage of K application in mulberry garden was 148.5 kg/hm2.