生态科学2024，Vol.43Issue(2)：1-7,7.DOI:10.14108/j.cnki.1008-8873.2024.02.001
毛竹扩张对杉木林土壤及杉木叶片氮磷化学计量特征影响
Effects of Phyllostachys edulis expansion on soil and leaf N,P stoichiometry in Cunninghamia lanceolata forests
摘要
Abstract
To reveal the ecological stoichiometry mechanism of Phyllostachys edulis expansion effects on the growth of Cunninghamia lanceolata individuals,this study analyzed the N,P concentration and N:P ratio of soil,P.edulis leaf and C.lanceolata leaf(young,mature and litter)in P.edulis-C.lanceolata mixed forest and its adjacent C.lanceolata forest and P.edulis forest by the methods of space-time substitution Jinggangshan National Nature Reserve.The results showed that(1)the soil P concentration was increased by 32.6%,from 0.32 mg·g-1 in the C.lanceolata forest to 0.43 mg·g-1 in P.edulis-C.lanceolata mixed forest.(2)N:P ratio in the mature leaf of C.lanceolata had no variations(13.74)in the three types of forests.However,the P concentration of young leaf was increased,leading to a fall of the N:P ratio by 21.3%.N:P ratio in litters was descended by 13.6%,from 21.64 to 18.69.There was no difference in the leaf N,P concentration and N:P ratio of P.edulis during the expansion process.(3)P.edulis expansion had no significant influences on leaf N and P resorption proficiency of C.lanceolata.These findings indicate that P.edulis has a strong homeostasis ability,and P.edulis expansion can prevent the growth or even cause the death of C.lanceolata by altering the soli P concentration and thus unbalancing the P content and N:P stoichiometry in C.lanceolata.关键词
植物入侵/杉木/生态化学计量学/内稳态/回收度/井冈山国家级自然保护区Key words
plant expansion/Cunninghamia lanceolata/ecological stoichiometry/homeostasis/resorption proficiency/Jinggangshan National Nature Reserve分类
农业科技引用本文复制引用
宋述望,欧阳明,刘骏,宋庆妮,方熊,栾丰刚,杨清培..毛竹扩张对杉木林土壤及杉木叶片氮磷化学计量特征影响[J].生态科学,2024,43(2):1-7,7.基金项目
国家自然科学基金(32060319,41807028,31460077,32360801) （32060319,41807028,31460077,32360801）
江西省"千人计划"引进类创新领军人才长期青年项目(jxsq2020101079) （jxsq2020101079）
