Fertigation Technology Research Of Apple In Jiangsu Province

The experiment was carried out in Jiangsu Province,Fengxian County Liang Zhai Town Apple demonstration garden from March 2016 to November 2016.This paper mainly studies the advantages of fertigation as compared with conventional fertilization,and the effects of different fertilization amount,fertilization frequency and different brands of water soluble fertilizer on the growth,fruit quality and yield of apple.Based on the analysis of the growth and development of apple tree,the content of mineral elements in leaves,fruit quality,the content of mineral elements in fruit and the yield and fertilizer cost,the following conclusions were obtained:1.The effects of different fertilization treatments on leaf chlorophyll content,fruit firmness and soluble sugar content of fruit were not significant.Compared with the conventional fertilization,fertigation increased plant height,stem circumference,new shoot increment,leaf area index,flower bud number,the ratio of floral bud,leaf K,Ca,Mg content,fruit weight,the content of fruit soluble solids,Vc,and N,K content.Compared with traditional fertilization,fertigation saving fertilizer more than 30%.Among the treatments of different fertilizer application rates,the comprehensive evaluation index of NPK-80%treatment is the highest.2.The variation trend of mineral elements content in apple leaves under different fertilization treatments was consistent.Increase the frequency of fertigation,the plant height,dry perimeter growth,shoot growth,leaf area index,titratable acid content,Vc content,P content in fruit and K content in leaves were increased.Among the treatments with different fertigation frequencies,the comprehensive evaluation index was the highest with applying fertilizer once every 15 days.3.The highest yield was obtained when self-made water soluble fertilizers were used in fertigation.Comprehensive comparison of the indicators,Bai Yi De water soluble fertilizer is relatively good.4.Considering the different treatments of various physiological indexes and the cost of fertilizer,fertigation method recommended fertilization NPK-100%,the frequency of fertilization 15 days.