湖南不同立地条件光皮树生物量变化及营养元素累积特性研究  

Study on Biomass Change and Nutrient Accumulation Characteristics of Swida wilsoniana Under Different Site Conditions in Hunan

作　　者：李洁[1] 

机构地区：[1]湖南省林业科学院,湖南长沙410004

出　　处：《绿色科技》2017年第21期108-110,113,共4页Journal of Green Science and Technology

基　　金：湖南省科技厅项目(编号:2012FJ4278)

摘　　要：为了弄清光皮树生物量变化及营养元素累积特性,给光皮树测土配方提供技术支持,采用实验室常规检测法对不同立地条件下光皮树生长状况以及营养元素含量变化进行了测定,结果分析得出:不同立地条件光皮树不同树体部位生物量变化不同,浏阳试验点光皮树由于修剪造成枝叶生长较慢,生物量变化较小,而道县试验点和龙山试验点由于进入果实始果期或丰产期,不断促发营养枝和结果枝,生物量变化较大;磷元素在光皮树不同部位含量普遍较低,是否存在缺素症,有待进一步研究,氮元素在叶、枝部位含量较高,普遍在0.5%以上,其他部位含量较小,基本维持在0.5%以下,钾元素在叶、果实部位含量较高,超过0.5%,其他部位含量接近或低于0.5%。In order to get the biomass and nutrient accumulation characteristics of Swida,technical support for Swida soiltesting of Swida growth and nutrient content change under different site conditions were determined by routine la- boratory test method. The results showed that the biomass of Swidaare different in tree parts under different site conditions. The Liuyang Swida has small changes in biomassdue to slower growth caused by pruning branches. While,the test pointol Daoxian Countyand Longshan has obvious changes in biomass because it is atthe beginning of period of fruit yieldconstantly promoting vegetative shoots and fruit biomass. Phosphorus in different parts were gen- erally Swida low, which needs to be further studiedwhether there is lack of deficiency. The content of nitrogen in leaves and branches with generally above 0.5% is higher than that in other parts and the content of other elements is less than 0.5%. The content of potassium in leaves and fruit is higher than 0.5% and the content of other parts is close or low at 0.5

关 键 词：不同立地条件 生物量 营养指标 差异 

分 类 号：S794.9[农业科学—林木遗传育种]