【摘要】 对沿海沙地吊丝竹林不同年龄植株养分分布特征进行了研究,结果表明:N浓度除1年生枝外各年龄竹秆、枝、叶均随着所处位置的升高而呈单峰变化趋势,P,K,Mg浓度随着竹秆高度的增加而增大.不同器官各养分浓度均表现为:竹叶>竹枝>竹秆,1年生竹养分浓度>2年生竹.不同年龄吊丝竹各养分含量所占比例从大到小依次为N>K>Mg>P>Ca.吊丝竹林分各元素现存量的分配乔木层占绝对优势.乔木层各器官N,P,K,Ca养分现存量均以竹秆为最大,分别占整个乔木层的45.00%,50.48%,49.84%和47.04%;而Mg元素现存量为竹叶最高.吊丝竹林分群落下层枯落物层储存了较多的N和P,而草本层则储存了较多的K,Ca和Mg.更多还原

【Abstract】 A study on nutrient distribution features in different organs of Dendrocalamus minor plantation in coastal sandy area was carried out,and the following results were obtained.The concentrations of N nutrient in the culms,branches and leaves of different-aged plants increased with height increment of the bamboos except for the one-year-old branches,presenting one-peak variation tendency.The concentrations of P,K and Mg in different parts of the bamboos also tended to increase with height growth.Each nutrient concentration in different organs was in the order of culm > branch > leaf,and the nutrient concentrations in different organs of one-year-old plants were higher than in those of two-year-old bamboo plants.The order of varied nutrient content proportions in D.minor plants of different ages was as N > P > Mg > K > Ca.These chemical elements were mainly distributed in arbor layer of the D.minor stand,while the amounts of N,P,K,Ca nutrients in the bamboo culms accounted for 45.00%,50.48%,49.84% and 47.04% respectively of the total quantity in the arbor layer.However,the largest portion of Mg nutrient was stored in bamboo leaves.The litter layer in the D.minor plantation stored more N and P,whereas the herbaceous layer in the plantation contained more K,Ca and Mg nutrient elements.更多还原