Effects of Different Fertilization Treatments on the Growth and Physiological Indexes of Photinia davidso-niae Seedlings
To reveal the effect of different fertilization treatmentson growth and physiological characteristics of Photinia davidsoniae seedlings,explore the best fertilization methodat seedling stage,by setting up 4 kinds of fertilization treatments,namely T1(40%stan-dard Biom fertilizer),T2(50%Volme organic fertilizer),T3(50%Biom organicfertilizer + urea),T4(50%Volmeorganic fertilizer + urea + potassium dihydrogen phosphate),no fertilization as control(CK),studied variation of the growth and physiological of P.david-soniae seedlings under different fertilization treatments.The results showed that height,crown amplitude,ground diameter and high di-ameter ratio under T1 were not significantly different from CK,but that of T2,T3 and T4 treatment were significantly higher that.The effect of fertilization on the primary root growth of seedlings was not obvious,and the number of lateral roots increased significantly.Fertilization had a significant effect on both overground and total dry weight,there were not significant differences between the T3 and T4,However,they were significantly higher than that of T1,T2 and CK.Chlorophyll a,chlorophyll b and chlorophyll(a+b)under T3 and T4 were significantly larger than CK,however,the carotenoid content did not change significantly.Under T3 the content of soluble sugars of seedlings increased significantly,the soluble protein contenttwas the highest.Compound fertilization can significantly improve the quality of the seedlings,and help to cultivate the best seedlings under T3 and T4.
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