宜春市袁州区油茶林地土壤养分限制因子研究

摘要

为了解宜春市袁州区油茶(Camellia oleifera Abel)林地土壤养分状况,确定限制油茶生长的养分因素及最佳施肥技术,以高粱作为指示植物,采用土壤养分状况系统研究法,对该区油茶林地土壤养分限制因子进行研究° 结果表明,宜春袁州区油茶林土壤有机质含量较丰裕,P、K、Ca、Mg及硝态氮养分元素含量低下,S元素最为丰富;该土壤对P的吸附固定能力最强,对Mn的吸附最弱;N、P、Ca是该油茶林地的主要限制因子,Fe、Cu、K、Mo是潜在的养分限制因子° 为实现该油茶林平衡施肥,在施足N、P、Ca肥的同时应配合施用一定量的Fe、Cu、K、Mo肥.%In order to know the soil nurtrient status of the Camellia oleifera Abel forest land in Yuanzhou area of Yichun, and confirm the nurtrient factors which limiting the growth of the C. Oleifera Abel and the optimum fertilization technique, sorghum as the plant indicator,the soil nutrient limiting factors of the C. oleifera Abel land in Yuanzhou area of Yichun were studied by adopting the system diagnosis of soil nutrient status. The results showed that the content of organic matter was rel-ative abundant in the C. Oleifera Abel land in Yuanzhou area of Yichun, while the content of P,K,Ca,Mg and nitrate nitro-gen were on low level,S element was most plentiful; And the soil adsorption capacity for P was most strong,while as for Mn, it was the lowest; N,P,Ca were the main soil nutrient limiting factors, and the latent soil nutrient limiting factors were Fe,Cu,K,Mo. In order to achieve balanced fertilizer,Fe,Cu,K,Mo fertilizer ought to be feeded appropriately when the N,P, Ca fertilizer were applied amply.