摘要
通过连续1 a的N添加（0（对照）、低N、中N、高N）人工受控试验,探讨了N供给改变对华润楠苗木叶片C、N、P化学计量特征的影响.结果表明：不同程度的N添加处理后,华润楠苗木叶片C、N、P含量分别为45.200％～45.568％、1.705％～1.835％和0.072％～0.086％;茎C、N、P含量分别为44.387％～44.582％、0.943％～1.001％和0.054％～0.071％;根C、N、P含量分别为37.232％～37.634％、0.942％～0.995％和0.062％～0.083％,N添加后叶片、茎、根中C、N、P含量均显著高于对照.叶片C∶N、C∶P、N∶P的范围分别为26.870～28.465、534.528～665.874和23.750～27.145;茎C∶N、C∶P、N∶P的范围分别为48.854～50.378、674.739～946.525和15.136～25.281;根C∶N、C∶P、N∶P的范围分别为38.503～40.096,483.905～750.579和12.419～21.042,N添加后叶片、茎、根C∶N、C∶P、N∶P均显著低于对照.在N添加的1 a时间里华润楠苗木养分含量随时间的变化表现出一定波动性.
A field experiment was carried out on response of Machilus chinensis to nitrogen addition and its ecological stoichiometry characteristics. The experiment with nitrogen addition at 4 levels lasted for a year. Results showed that,C, N and P contents of leaves were 45. 200%-45. 568 %, 1. 705%- 1. 835% and 0. 072% - 0. 086%, which of branches were 44. 38791%-44. 582%,0. 943%- 1. 001% and 0. 054% - 0. 071%,and which of roots were 37. 232%-37. 634% 0. 942%-0. 995% and 0. 062%-0. 083%. The contents of C, N and P increased significantly with N addition. The C： N, C： P and N. P of leaves were 26. 870-28. 465,534. 528-665. 874 and 23. 750-27. 145, which of branches were 48. 854- 50. 378, 674. 739-946. 525 and 15. 136-25. 281,which of roots were 38. 503-40. 096,483. 905-750. 579 and 12. 419-21. 042. The values decreased significantly with N addition.
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2013年第5期94-99,共6页
Journal of Gansu Agricultural University
基金
国家自然科学基金项目(31170596
31170374
30901151)
国家农业科技成果转化资金项目(2011GB2C400005)
福建省科技厅重点项目(2010I0004)
关键词
氮添加
碳氮磷
生态化学计量特征
华润楠
nitrogen addition
carbon nitrogen phosphorus
ecological stoichiometry characteristics Machilus chinensis
