Influence of swine manure on growth, P uptake and activities of acid phosphatase and phytase of Polygonum hydropiper.
Excessive application of animal manure to the farmland results in enrichment of P in the soil. Phytoremediation is a promising strategy for extracting excess P from manure impacted soil. P uptake characteristics of a mining ecotype (ME) and a non-mining ecotype (NME) of Polygonum hydropiper were investigated in this study by adopting soil culture containing various concentrations of swine manure (0-200 g swine manure kg(-1) soil). A peak value in the biomass of P. hydropiper was determined in 100 g kg(-1) soil. Significant increase of P content in tissues of two ecotypes was noticed with an increase in swine manure concentration. Maximum P accumulation in shoots and roots was observed at the concentration of 100 g kg(-1) soil, however, the ME accumulated more P as compared to the NME. The ME showed a lower plant effective number and a higher P extraction ratio compared to the NME. Both acid phosphatase and phytase activities of P. hydropiper were obviously enhanced under swine manure impacted soil compared with control, while those of ME higher than the NMEs. Therefore, the two ecotypes of P. hydropiper can accumulate P from soil amended with swine manure and establishes the foundation for phytoremediation.
College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
Daihua
D
Ye
College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, Sichuan, China. Electronic address: litinx@263.net.
Tingxuan
T
Li
College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
Guangdeng
G
Chen
College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
Zicheng
Z
Zheng
College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
Haiying
H
Yu
College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
Xizhou
X
Zhang
D010832:6-Phytase / Q000378:metabolism; D000135:Acid Phosphatase / Q000378:metabolism; D000818:Animals; D001673:Biodegradation, Environmental; D018533:Biomass; D008372:Manure; D010758:Phosphorus / Q000378:metabolism*; D018515:Plant Leaves / Q000254:growth & development / Q000378:metabolism; D010940:Plant Proteins / Q000378:metabolism; D018517:Plant Roots / Q000235:genetics / Q000378:metabolism; D018520:Plant Shoots / Q000254:growth & development / Q000378:metabolism; D028502:Polygonum / Q000254:growth & development / Q000378:metabolism*; D012989:Soil Pollutants / Q000378:metabolism*; D013552:Swine
D008372:Manure; D010940:Plant Proteins; D012989:Soil Pollutants; D010758:Phosphorus; D000135:Acid Phosphatase; D010832:6-Phytase
Acid phosphatase; Manure; Phosphorus (P); Phytase; Phytoremediation