杉木林下七叶一枝花各器官的主要养分含量及其分配特征

Content and Distribution Characteristics of Main Nutrients in Each Organ of Paris polyphylla Smith var.chinensis Under-forest of Cunninghamia lanceolata

[目的]了解和掌握七叶一枝花Paris polyphylla Smith var.chinensis花期各器官的养分含量及其分配特征,为其林下栽培和养分管理提供科学依据。[方法]以杉木Cunninghamia lanceolata林下人工种植的七叶一枝花为研究对象,于花期进行采样,统计分析各器官的N、P、K、Ca、Mg等主要养分含量、分配特征及各养分含量间的相关性。[结果]七叶一枝花各器官中的N含量从高到低依次为叶、花、须根、块茎、茎,叶中N含量最高达29.61 g/kg;P含量从大到小依次为花、叶、须根、块茎、茎,花中P含量最高达4.75 g/kg;钾含量从大到小依次为叶、花、茎、须根、块茎,叶中K含量最高达25.23 g/kg;Ca含量从大到小依次为块茎、须根、茎、叶、花,块茎中Ca含量最高达4.75 g/kg;Mg含量从大到小依次为叶、花、须根、块茎、茎,叶中Mg含量最高达3.11 g/kg;七叶一枝花各器官养分含量从大到小依次为N、K、Ca、Mg、P;各器官养分含量间除了块茎中的N与Mg呈显著负相关外(P<0.05),其余指标间的相关性均未达显著水平。[结论]七叶一枝花花期各器官的养分含量主要集中在叶和花中,N和P可能是限制七叶一枝花生长的主要营养元素。

[Objective]To understand the main nutrients content and distribution characteristics in each organ of Paris polyphylla Smith var.chinensis during flowering period in order to provide scientific basis for understory cultivation and nutrient management.[Method]With Paris polyphylla Smith var.chinensis of under-forest the Cunninghamia lanceolata as the research object,samples were collected at flowering stage,and the content and distribution characteristics and their correlation of main nutrients in each organ were analyzed.[Result]N content in each organ was ranked from high to low as leaf,flower,fibrous root,tuber,stem from high to low,and the highest N content in leaf was 29.61 g/kg.P content was ranked from high to low as flower,leaf,fibrous root,tuber,stem,and the highest P content in flower was 4.75 g/kg.K content was ranked from high to low as leaf,flower,stem,fibrous root,tuber,and the highest K content in leaf was 25.23 g/kg.Ca content was ranked from high to low as tuber,fibrous root,stem,leaf,flower and the highest Ca content in tuber was 4.75 g/kg.Mg content was ranked from high to low as leaf,flower,fibrous root,tuber,stem and the highest Mg content in leaf was 3.11 g/kg.The average nutrient content of each organ of Paris polyphylla Smith var.chinensis was ranked from high to low as N,K,Ca,Mg,P.Except N and Mg contents in tuber showed significant negative correlation(P<0.05),the rest of the correlation was not significant.[Conclusion]The nutrients in each organ of Paris polyphylla Smith var.chinensis during flowering period were mainly concentrated in the leaves and flowers.N and P may be the main nutrient elements limiting the growth of Paris polyphylla Smith var.chinensis.