Effects of Combined Application of Nitrogen,Phosphorus and Potassium Fertilizers on the Yield of Sambucus williamsii
To study the effect of nitrogen,phosphorus,and potassium fertilization on the fruit yield of Sambucus williamsii Hance,a field trial was conducted using the"3414"complete fertilization scheme to determine the fruit yield of Sambucus williamsii Hance under different fertilization ratios.The results showed that a reasonable combination of nitrogen,phosphorus,and potassium could improve the fruit yield of Sambucus williamsii Hance to varying degrees,with the highest yield under N2P2K2 fertilization treatment,reaching 2.63 kg per plant.There is a significant interaction effect of nitrogen,phosphorus,and potassium on the yield of Sambucus williamsii Hance,manifested as nitrogen and potassium＞phosphorus and potassium＞nitrogen and phosphorus.The fertilization dependency in the fully fertilized area is 44.9％,and the fertilization dependency in the potassium deficient area is 33.78％,indicating that potassium fertilizer has an important impact on the yield of Sambucus williamsii Hance fruit.The results of this study provide a theoretical basis for guiding and standardizing the fertilization.
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