稻壳生物炭对玉米生物量及土壤性状的影响

Effects of Rice Husk Biochar Amendment on Corn Grow and Soil Properties

采用盆栽试验,研究了稻壳生物炭对玉米生长及土壤理化性状的影响。结果表明,在玉米生长的前10周,生物炭对玉米株高的生长有抑制作用,但随着玉米的生长发育,抑制作用逐渐消失。收获时,生物炭对玉米生物量没有显著影响。随着生物炭增加,土壤的有机碳和全氮增加,并且当生物炭用量为5%时达到显著水平。生物炭对土壤p H、铵态氮、硝态氮的含量没有显著影响。

Pot trial was used to investigate the effects of rice husk biochar amendment on corn grow and soil phys-ico - chemical properties. The results show that biochar inhibit corn height grow before 10 weeks during the incu-bation period, but after then the inhibition effects of biochar gradually disappear. At the harvest period of corn,there is no significant difference between the control soil and soil with biochar addition in terms of corn biomass.Moreover, with rise of biochar addition, the soil organic carbon contents and total nitrogen contents increase, andbiochar with 5% addition significantly increases the soil organic carbon contents and total nitrogen contents,compared to the control soil. However, biochar addition does not significantly affect the pH, ammonium nitrogencontents and nitrate nitrogen contents of soil.