Effects of Formula Fertilization on the Growth and Soil Characteristics of Carya illinoensis
To explore the suitable fertilization formulas for the growth and development of the Carya illinoensis young forest,a N,P,K 3 factors with 4 levels in 16 treatments of orthogonal experiment was designed to explore the effects of different fertilization formulas on the growth,soil enzyme activity,soil nutrient content and the nutrient content of leaf mineral.The order of fertilizer affecting the young forest tree height and stem thickness growth reducing as:urea,potassium chloride,calcium superphosphate and the optimal level combination was:0.45 kg·plant-1 urea+1.71 kg·plant-1 calcium perphosphate+0.28 kg·plant-1 potassium chloride.The order of fertilizer affecting the content of leaf nitrogen,phosphorus and potassium reducing as:potassium chloride,urea,calcium superphosphate and the optimal level combination was:0.11 kg·plant-1 urea+0.85 kg·plant-1 calcium superphosphate+0.46 kg·plant-1 potassium chloride.The order of fertilizer that affected the effective content of soil nitrogen,phosphorus,potassium and organic matter reducing as:urea,potassium chloride,calcium superphosphate and the optimal level combination was:0.33 kg·plant-1 urea+1.28 kg·plant-1 calcium perphosphate+0.28 kg·plant-1 potassium chloride.The order of fertilizer that affected the level of soil enzyme activity reducing as:urea,calcium superphosphate,potassium chloride and the optimal level combination was:0.22 kg·plant-1 urea+0.85 kg·plant-1 calcium superphosphate+0.28 kg·plant-1 potassium chloride.The growth of tree height and stem diameter were significantly negatively correlated with leaf total N and P contents.There was a significant positive correlation between soil sucrase and soil effective N,P and K.The order of fertilizer affecting the growth and development of young forest reducing as:urea,potassium chloride,calcium superphosphate and the optimal level of fertilization combination was 0.45 kg·plant-1 urea+0.85 kg·plant-1 calcium perphosphate+0.28 kg·plant-1 potassium chloride.
formula fertilizationCarya illinoensisgrowthsoil enzymessoil nutrientsleaf nutrients
万方数据
维普
