Chin J Plan Ecolo ›› 2013, Vol. 37 ›› Issue (7): 674-683.doi: 10.3724/SP.J.1258.2013.00070

• Research Articles • Previous Articles     Next Articles

Effects of fertilization on Alnus formosana fine root morphological characteristics, biomass and issue content of C, N under A. formosana-Hemarthria compressa compound mode

MIAO Yu, CHEN Yue-Lin, LI Xian-Wei*, FAN Chuan, LIU Yun-Ke, YANG Zheng-Ju, ZHANG Jun, and CAI Xin-Li   

  1. College of Forestry, Sichuan Agricultural University, Sichuan Provincal Key Laboratory of Forestry Ecological Engineering in Upper Reaches of Yangtze River, Ya’an, Sichuan 625014, China
  • Received:2013-01-28 Revised:2013-04-17 Online:2013-07-05 Published:2013-07-01
  • Contact: LI Xian-Wei E-mail:lxw@sicau.edu.cn

Abstract:

Aims Our objectives were to: 1) examine fine root biomass, morphological characteristics and content of C and N of Alnus formosana in an A. formosana-Hemarthria compressa composite model in Danling, Sichuan Province, China, 2) examine the effects of fertilization on each order of fine roots, and 3) analyze the relationship between soil nutrients and fine root biomass, architecture and content of C and N.
Methods In September 2010, we established two subdistricts, eradicated weeds and planted H. compressa. We fertilized one subdistrict with N-P-K fertilizer in April, June, August and October and did not fertilize the other subdistrict. We excavated soil blocks of 20 cm × 20 cm × 10 cm (height) to sample intact fine root branches of at least the first branch orders. We dissected the intact root branches by orders and measured the diameter, specific root length, biomass, and C and N content of each order.
Important findings Fertilization reduced fine-root average diameter in soil surface and increased that in soil subsurface. In fine-root orders 1–5, specific root length increased as root order decreased. Fertilization significantly increased specific root length in fine-root orders 1–3 in soil surface and subsurface (p < 0.01). Fertilization reduced fine-root biomass in all soil layers and significantly reduced the ratio of fine-root biomass to total root biomass in orders 1–3 (p < 0.05), while fine root biomass increased in orders 4 and 5. The effect of fertilization on fine-root C content was not significant in all orders (p > 0.05). Soil surface total N content of fine roots of 1–5 orders was higher than that in subsurface. Fertilization significantly (p < 0.01) increased fine-root N content of order 1 fine roots in soil surface and orders 1 and 2 in the subsurface, but had no significant effects on orders 3–5 (p > 0.05).

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] Kaifa Wei*;Yiping Liu;Ziying Lin;Yafang Yang;Zehong Zhang;Wensuo Jia. Problems and Solutions in Agrobacterium tumefaciens-mediated Genetic Transformation of Monocotyledons[J]. Chin Bull Bot, 2008, 25(04): 491 -496 .
[2] Zhong Shi-qiang. Some Abnormalities in Flower of Siraitia[J]. Chin Bull Bot, 1984, 2(23): 79 .
[3] . Interaction Between the Inherent Resistant Secondary Metabolites and the Exogenous Insect-ResistaProtein of Transgenic Plantsnce[J]. Chin Bull Bot, 2004, 21(06): 733 -742 .
[4] WAN Hai-Qing;LIANG Ming-Shan and XU Jie-Mei. Molecular Biological Studies in Plant Systematics and Evolution[J]. Chin Bull Bot, 1998, 15(04): 8 -17 .
[5] Lichai Yuan;Xueping Li;Zhenhua Peng;Jian Gao. Ultrastructure of the Albino and Green Mutants of Pleioblastus fortunei and Expression of 15 Chloroplast Genes[J]. Chin Bull Bot, 2010, 45(04): 451 -459 .
[6] Lubin Li;Jingyu Wu;Tao Hu;Xuewen Yang;Zhenhua Peng*. Estimation of Genome Size of Moso Bamboo (Phyllostachys edulis)[J]. Chin Bull Bot, 2008, 25(05): 574 -578 .
[7] Tengfang Ling;Jinshan Lin;Hui Liu;Bo Zhang;Jing Li;Tian Yu;Maobing Ye;Wenbiao Shen. A Rapid Micro-volume Method for Determining b-amylase Activity in Plant Seeds[J]. Chin Bull Bot, 2006, 23(3): 281 -285 .
[8] Huang Ju-fu and Luo Ai-ling. The Advances of the Studies on Extraction of FeMoco from Nitrogenase Molybdenum-Iron Protein[J]. Chin Bull Bot, 1991, 8(03): 19 -25 .
[9] Yang Ji. The Applications of Statistical Methods to the Study of Intraspecific Variation[J]. Chin Bull Bot, 1991, 8(01): 30 -36 .
[10] Xing Yi-ran Liu Guo-fan Xing Jian-jun. Application of the Cold-resister Bring New Hope for Increasing Yield of Our County's Early-rice[J]. Chin Bull Bot, 1994, 11(特辑): 88 -89 .