不同母质条件下海南省胶园土壤肥力特性研究

目的]为胶园土壤肥力的管理提供依据。方法]对海南省胶园酸性火成岩、基性火成岩、酸性变质岩、沉积岩、冲积物、海积物等不同母质发育下的土壤有机质和氮磷钾养分含量进行分析,研究胶园土壤肥力指标与其母质之间的关系。结果]胶园不同土层土壤有机质、全氮、全磷含量均为在玄武岩中最高,全钾、缓效钾含量在花岗岩中最高。胶园0~20 cm土壤速效氮含量在页岩中最高,21~40、41~60 cm土壤速效氮含量在玄武岩中最高。结论]胶园土壤有机质和氮磷钾养分含量在一些母质上对母岩特性有继承性,但生物气候及耕作与施肥等因素已经完全弱化了因母岩成分不同而造成的土壤有机质及氮磷钾养分含量的差异。

Prelimimary Research on soil Fertility Characteristics in Rubber Plantation in Hainan Province under Different soil Parent Materials

Objective]The study aimed to provide the basis for management of soil fertility in rubber plantation.Method]The nutrient contents of soil organic matter and NPK in different patent materials such as intermediate-acid igneous rocks,mafic igneous rocks,intermediate-acid metamorphic rock,sedimentary rock,alluvium and marine sediments in rubber plantation in Hainan Province were analyzed to study the relationship between the soil fertility index in rubber plantation and their soil patent materials.Result] The contents of soil organic matter,total N and total P in different soil layers in rubber plantation were all the highest in basalt and that of total K and slowly available K were the highest in granite.The content of available N in soil layer of 0-20 cm in rubber plantation was the highest in shale and that of available N in soil layer of 21-40 and 41-60 cm were the highest in basalt.Conclusion] The nutrient contents of soil organic matter and NPK in rubber plantation had the inheriting characters to some soil patent materials,but the factors such as bioclimate,cultivation and fertilization had completely weakened the difference of the nutrient contents of soil organic matter and NPK which were caused by different soil patent materials.