Journal of Ecology and Rural Environment ›› 2017, Vol. 33 ›› Issue (4): 357-363.doi: 10.11934/j.issn.1673-4831.2017.04.009

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Effect of Amendment of Biomanure of Phosphate-Solubilizing Bacteria on Soil Phosphorus Availability in Reclaimed Farmland in Coal Mining Subsidence Area

MENG Hui-sheng, HONG Jian-ping, WU Wen-li, LI Li   

  1. College of Resources and Environment, Shanxi Agricultural University, Taigu 030801, China
  • Received:2016-04-01 Online:2017-04-25 Published:2017-04-01


A field experiment was carried out in a tract of farmland that had been reclaimed for 5 years in a coal mining subsidence area to study effects of amendment of biomanure of phosphorus-solubilizing bacteria on forms and adsorption and desorption of soil inorganic phosphorus in reclaimed farmland. Results show that amendment of the biomanure could raise the content of soil available phosphorus and the contents of soil Ca2-P, Ca8-P and occluded phosphorus (O-P), but lower the contents of Al-P, Fe-P and Ca10-P. The contents of Ca2-P and Ca8-P were significantly and positively related to the content of available phosphorus with correlation coefficient being 0.997 and 0.926, respectively, and contributed the most to the content of soil available phosphorus. The treatment of manure+chemical fertilizer + biomanure (MCFB) significantly reduced the constant (K) of P adsorption by soil and soil maximum buffer capacity (MBC). Compared to the treatment without amendment of biomanure, it had less impact on maximum P desorption. Amendment of the biomanure may increase maximum P desorption capacity (Xm) of the soil and P desorption rate in the reclaimed soil, thus improving soil phosphorus availability. Besides, amendment of the biomanure may also raise soil organic matter content to a certain extent. Treatment MCFB in the field experiment can increase maize yield significantly or by 3.82% as compared with the treatment without amendment of biomanure.

Key words: phosphorus-solubilizing bacteria manure, reclaimed soil, inorganic phosphorus form, adsorption, desorption, available phosphorus

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