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Acta Prataculturae Sinica ›› 2017, Vol. 26 ›› Issue (11): 139-146.DOI: 10.11686/cyxb2017044

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Phosphorous accumulation characteristics of two ecotypes of Pilea sinofasciata grown in soils amended with swine manure

CHEN Jing1, HUANG You-Sheng2, LI Ting-Xuan1,*   

  1. 1.College of Resources, Sichuan Agricultural University, Chengdu 611130, China;
    2.Sichuan Agricultural Mechanization Cadre School, Chengdu 610017, China
  • Received:2017-02-16 Revised:2017-04-10 Online:2017-11-20 Published:2017-11-20

Abstract: Phosphorus (P) accumulation in soil due to excessive use of swine manure causes a series of environmental problems. In order to provide a sound basis for attempts to remove excess P, a study has been undertaken of its accumulation characteristics in two ecotypes of Pilea sinofasciata. A mining ecotype (ME) and a non-mining ecotype (NME) were grown in soils amended with 50 g/kg swine manure. The results were as follows. 1) The biomass of the shoot and whole plant increased during the growth periods recorded, reaching maximum values at the 13th week. The ME shoot and whole plant biomass were 1.43-2.26 and 1.41-2.20 times higher than that of NME respectively (P<0.05). 2) The P accumulation rate of the shoot and whole plant in the two ecotypes reached their maximum values at the 9th-11th week. The P accumulation in ME shoot and whole plant were significantly higher than that of NME (P<0.05), and up to 105.21 and 119.50 mg/plant at the 13th week respectively. 3) Soil available P and the activities of acid phosphatase and phytase increased with the application of swine manure. The acid phosphatase and phytase activities in the rhizosphere soils of the two ecotypes reached their maximum values at the 11th week. The phytase activities in the ME rhizosphere soils were significantly higher than those of NME. These results demonstrate that the ME presented better growth and greater P accumulation when grown in soils amended with swine manure. The greater rhizosphere acid phosphatase and phytase activities in the ME rhizosphere soils contributed significantly to the availability of soil P, thus promoting P accumulation in P. sinofasciata.