Studies On Distribution Characteristics Of Nutrient Elements On Schima Superba Plantation

Schima superba Gardn.et Champ has a straight trunk, excellent material, biological fire, keeping fertility and a series of excellent features, is a good economic and ecological species. Currently, Superba superba plantation management is not good. The experiment was based on plantation production and productivity of Schima superba plantation, it aimed to study plant components nutrients (N, P, K, Ca, Mg) distribution pattern and correlation. Provide the basis for Schima superba plantation cultivation; the study will add the contents about Schima superba in these areas. The results showed that:(1) Distribution of different organs'nutrient elements:the nutrition elements contents in different organs of Schima superba are different, but they generally followed a similar change rule, the above-ground parts nutrient contents of different components was in the order of leaf> bark> branches> big branch> stem. The underground parts nutrient contents of different components was in the order of fine roots> root> thick root> root except Ca. The contents of N and K were the highest in different components, and P was the lowest. The order of K>N>Ca>Mg>P.(2) Distribution of different diameter classes'nutrient elements:among the various diameter classes five kinds of content difference is significantly large number of elements. The content nutrient elements in 12-16 diameter class is in order of K>N>Ca>Mg>P.20-32 diameter class is in order of K>N>Ca>Mg>P. 20 diameter class element content are higher relative to other diameter classes.(3) The total nutrients accumulation and distribution:the total nutrient accumulations in 48-year-old Schima superba plantation stand was 3655.4796kg/hm2.The above-ground part nutrient accumulations was 2712.9143 kg/hm2, accounted for 74.22%,that is much larger than the underground part. Accumulation of nutrients of different components was in the order of stem> bark> branch> leaf>root, accumulation of different nutrients was in the order of K>N>Ca>Mg>P.(4) Correlation of nutrient elements:the nutrient elements content between different organs in Schima superba artificial forest has significant positive correlation, elements of N, P, Mg content and other large except itself showed a strong correlation between elements; Nutrient element content of correlation among different diameter classes showed no regularity, Ca, P and K element, N and Mg element existed significant correlation.The results found that Schima superba's K element content was higher than others tree species, at the same time this paper deduced the content of Ca and Mg element has a significant effect on Schima superba in the cultivation. The follow-up studies should be extended to the coupling correlation of aboveground and underground nutrient element, litter and nutrient cycling and in-depth, so we can provide more comprehensive guidance for Schima superba plantation.