广西植物2018，Vol.38Issue(3)：281-288,8.DOI:10.11931/guihaia.gxzw201708010
不同生境中鬼针草(Bidens pilosa)碳氮磷化学计量特征及其营养利用策略
Carbon, nitrogen and phosphorus stoichiometric characteristics of alien species Bidens pilosa from different habitats and strategy on their nutrient utilization
摘要
Abstract
In order to reveal the nutrient utilization strategy of the alien species under different habitats,carbon(C),ni-trogen(N)and phosphorus(P)stoichiometric characteristics of leaf and root of Bidens pilosa from three habitats and their relations with soil nutrients were analyzed through field sampling and laboratory measuring. Furthermore,the rela-tive growth rate and nutrient utilization strategy under these habitats were also analyzed.The results were as follows:(1) Total nitrogen(TN)and available nitrogen(AN)contents in soils under all three habitats were low,while organic car-bon(C)and total phosphorus(TP)were abundant. TN and TP contents of soil, in habitat I andⅡwere significantly less than those of the other two habitats,respectively,and both TN and TP in soil of habitatⅢwere significantly more than those of the other two habitats.(2)P content of leaf in low-N habitat was more than that of root,which implied that P was more distributed to aboveground of plants. P content of root in habitat with rich-N and -P was more than that of leaf,which showed that more P distributed in the root of plants. (3)There were different growth rates for aboveground part and root of B.pilosa under three habitats.The N/P and C/P values of leaves in low-N habitat were less than that of other two habitats,indicating that B.pilosa in low-N habitats had higher growth rates and more competitive advantage for aboveground part. The N/P and C/P values of leaves in low-P habitat were more than those of other habitats,showing that B. pilosa in low-P habitats has slower relative growth rates.The N/P and C/P of root in both rich-N and rich-P hab-itat were less than that of two habitats,implying that the root of B. pilosa in these habitats has higher growth rates,and further enables plants to increase competition for belowground part.(4)There was insignificantly negative correlation be-tween leaf N/P and root N/P of B. pilosa,therefore,between aboveground and the underground part of plant were al-lometry. There are different nutrient utilization and allocation strategies for B. pilosa under different habitats to ensure plants more competitive and invasive.关键词
鬼针草/化学计量特征/营养利用策略/生长速率/入侵性Key words
Bidens pilosa/stoichiometric characteristics/nutrient utilization strategy/growth rate/invasion分类
农业科技引用本文复制引用
陈文,王桔红,彭玉姣,吴晓蓉,张淑柔,汪翠丽,马伊婷..不同生境中鬼针草(Bidens pilosa)碳氮磷化学计量特征及其营养利用策略[J].广西植物,2018,38(3):281-288,8.基金项目
国家自然科学基金 (31770584) （31770584）
广东省科技厅项目 (2014A070713039) （2014A070713039）
广东省省市共建专项项目 Supported by the National Natural Science Foundation of China (31770584) （31770584）
Program of Institute of Science and Technology of Guangdong (2014A070713039) （2014A070713039）
Co-construction Program of Guangdong Province and Cities （）
