Effects of slow-release fertilizer on biomass and nutrient accumulation of Fraxinus malacophylla seedlings
This study aimed to investigate the effects of four types of slow-release fertilizers on the stoichiometric ratio of nitrogen,phosphorus,and potassium and biomass of Fraxinus malacophylla seedlings and to screen for the optimal fertilization amount for seedling growth.Four fertilization rates(0,1,2,and 4 kg·m-3)were employed as treatment for one-year-old F.malacophylla seedlings,with no fertilization(CK)as the control.Biomass,growth,and N,P,and K contents of each organ were measured,and the accumulation of N,P,and K was calculated.Curve fitting was performed to analyze the relationship between N,P,and K accumulation in various organs and stoichiometric ratio and biomass.The results showed that the best nutrient accumulation and biomass of F.malacophylla seedlings were obtained under the dosage of 1 kg·m-3 slow-release fertilizer,and significantly higher than those of the control group.The biomass of each organ and the accumulation of N,P,and K was in this order as follows:leaf>root>stem,and the accumulation of nutrients in each organ and single plant was in this order:N>K>P.A highly significant positive correlation(P<0.01)was observed between the accumulation of N,P,and K in various organs and biomass of F.malacophylla seedlings.N : P and K : P negatively correlated with biomass,whereas N : K significantly positively correlated with biomass(P<0.05).The N : P values of all organs of F.malacophylla seedlings were<14;plant growth was limited by elemental N,N : K<2.10,and K : P>3.40;and plant growth was not influenced by K.In summary,a dosage of 1 kg·m-3 slow-release fertilizer is beneficial for the growth of F.malacophylla seedlings.
万方数据
维普
