油茶林果实成熟期养分分配特征

以常宁市10年生油茶作为试材,对油茶养分分配规律、油茶林土壤养分与树体各器官营养元素含量的相关性进行研究,旨在为油茶营养诊断以及配方施肥提供科学依据。结果表明:油茶各器官中,大量元素含量由高到低排序依次为N、Ca、K、Mg、P,微量元素含量由高到低排序依次为Mn、Fe、Pb、Zn、Cu、Cd;土壤大量元素含量由高到低排序依次为Ca、N、K、P、Mg,微量元素含量由高到低排序依次为Fe、Pb、Zn、Cu、Mn、Cd。土壤养分含量与油茶各器官养分指标具有不同程度的相关性,与油茶干的养分含量相关性最为紧密;土壤N、Zn、Mn、Pb、K含量与油茶植株养分元素含量的关系最为紧密;土壤Mn与油茶各器官Mn元素含量均呈现正相关;土壤N与油茶干中N含量呈现极显著相关;土壤Cd元素含量和油茶各器官中Cd元素含量多存在负相关性。

Nutrient distribution in Camellia oleifera forest at fruit maturation period

In order to provide some scientific basis for nutrient diagnosis and formula fertilization of Camellia oleifera,selecting ten-year-old C.oleifera in Changning City as materials,nutrient distribution of C.oleifera,and correlation between soil nutrient contents and nutrient element contents in different organs were studied.The results showed that,based on the contents in different organs of C.oleifera from high to low,the order of major element content was N,Ca,K,Mg,P,and the order of microelement content was Mn,Fe,Pb,Zn,Cu,Cd.Based on the contents in soil from high to low,the order of major element content was Ca,N,K,P,Mg,and the order of mieroelement content was Fe,Pb,Zn,Cu,Mn,Cd.There were relations at different degrees between nutrient contents in soil and in different organs of C oleifera,and soil nutrient contents were the most closely correlated with nutrient contents in stem.The contents of N,Zn,Mn,Pb and K in soil were the most closely correlated with nutrient contents in C oleifera;Mn content in soil was all positively correlated with Mn contents in different organs;N content in soil was extremely significant correlated with N content in stem;Cd content in soil was negatively correlated with Cd contents in most organs.