Effects of ArbuscularMycorrhizalFungal Inoculation and Phosphorous Addition on Maize Photosynthesis and Growth in AReclaimed Soil of Mining Area

HAO Xianjun; Zhang Tiequan; HONG Jianping

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Effects of ArbuscularMycorrhizalFungal Inoculation and Phosphorous Addition on Maize Photosynthesis and Growth in AReclaimed Soil of Mining Area

HAO Xianjun 1,Zhang Tiequan 2,HONG Jianping 3 *

1.Faculty of Resources and Environment, Shanxi Agriculture University, Shanxi Taigu 030801

2.Greenhouse and Processing Crops Research Center, Agriculture and Agri-Food Canada, Harrow, ON Canada N0R 1G0

3.Faculty of Resources and Environment, Shanxi Agriculture University, Taigu County, Shanxi Province, China 030801

*Correspondence author

#Submitted by

Subject:

Funding: Higher Education Doctoral Program Special Fund （No.No. 20091403110003）, Shanxi Science and Technology Department（No.No. 2011021031-1）

Opened online:17 January 2013

Accepted by: none

Citation: HAO Xianjun,Zhang Tiequan,HONG Jianping.Effects of ArbuscularMycorrhizalFungal Inoculation and Phosphorous Addition on Maize Photosynthesis and Growth in AReclaimed Soil of Mining Area[OL]. [17 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4509184

Phytoremediation of the mining disturbed land has been a challenge due mostly to the low bioavailability of soil indigenous phosphorus (P), low water retention capacity and the low fertilizer P use efficiency in arid and semiarid regions. Arbuscular mycorrhizal fungi (AMF) has been shown to increase crop P uptake. However, inoculation effectiveness and responses of maize in the remediation of mining disturbed soils are unknown. In addition, the quantitative relationship between amendment of fertilizer P and photosynthesis and growth parameters are scarce. A greenhouse experiment was conducted to evaluate the effects of AMF (Glomus Mosseae) inoculation and fertilizer P addition on and to quantify the relationship with leaf photosynthesis and growth of maize. Root colonization, photosynthesis, water use efficiency and growth parameters of maize were either linearly or quadratically related to fertilizer P rate. Root colonization and net photosynthetic rate (Pn) of maize were estimated to obtain maximum value at 73 and 80 mg kg-1 P rate in rehabilitated mining area regardless of inoculation of AMF, while maize dry mass inoculated with AMF will attain maximum at 75 mg kg-1 P rate. Inoculation with AMF decreased the influence of fertilizer P to the above mentioned parameters. In addition, at the range of 0-100 mg kg-1 P rate inoculation with AMF significantly increased by 12.2 % on Pn, 21.9 % on leaf area, 31.7 % on shoot dry mass and 44.3 % on P use efficiency, while decreased 26.4 % on Tr and 28.9 % on Ci, related to NAMF. Inoculation of AMF had no effects on plant height. In conclusion, aforementioned parameters were dependent of fertilizer P amendment in P-deficiency rehabilitated mining area. Inoculation with G. Mosseae and applying of fertilizer P informed symbiosis and increased photosynthesis and growth of maize. The results are practically significance for the phytoremediation program of rehabilitated mining areas once validated under field conditions.

Keywords:Arbuscular mycorrhiza fungus (AMF); Land reclamation; Mining; Maize; Photosynthesis; Phosphorus; Phosphorus use efficiency; Water use efficiency

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