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以广玉兰幼苗为试材,采用生态学方法,研究了喀斯特地区6种不同岩性的土壤与广玉兰幼苗养分含量间的变化和影响,以期为喀斯特地区广玉兰幼苗的培育、生长和施肥提供参考依据。结果表明:在不同岩性的土壤上,土壤养分及广玉兰幼苗体内营养元素含量之间均存在显著差异;在不同岩性的土壤上,广玉兰幼苗对土壤有效养分的吸收在石英砂岩上最好,在第四纪红色粘土上最差;广玉兰幼苗在其整个生长过程中,对氮素和磷素的吸收较多,对钾素的吸收则相对较少。
Taking Magnolia biondii seedlings as test material, this paper studied the changes and effects of nutrient contents in six different lithological soils and Magnolia grandiflora seedlings in karst area by using ecological methods, in order to provide a basis for the cultivation, growth and fertilization of Magnolia sieboldii seedlings in karst area Reference. The results showed that there was a significant difference in nutrient contents between the soil and the nutrient elements of Magnolia grandiflora in different lithology soils. The uptake of soil available nutrient was the highest on the quartz sandstone Good, the Quaternary red clay on the worst; Magnolia seedlings in its entire growth process, more nitrogen and phosphorus absorption, the absorption of potassium is relatively small.