Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2018, Vol. 34 ›› Issue (15): 48-54.doi: 10.11924/j.issn.1000-6850.casb17040153

Special Issue: 油料作物 园艺

Previous Articles     Next Articles

Effects of Co-application of Poly-γ-glutamic Acid and Different Forms of Nitrogen Fertilizer on Rape Growth

  

  • Received:2017-04-25 Revised:2017-06-26 Accepted:2017-07-05 Online:2018-05-29 Published:2018-05-29

Abstract: To investigate the synergistic effect of poly-γ-glutamic acid (γ-PGA) on different forms of nitrogen fertilizers (urea, ammonium chloride, sodium nitrate and combined application of organic and inorganic fertilizers), a pot experiment was conducted to study the effects of γ-PGA combined with different forms of nitrogen fertilizer on rape yield, quality and utilization rate of fertilizer. [Result]The results showed that the yield of rape was increased by 1.25%~26.77% under 4 forms of nitrogen fertilizer combined with γ-PGA. With 4.3 mg/kg soil of γ-PGA, the synergistic effect was better under urea and combined application of organic and inorganic fertilizers. The contents of soluble sugar, soluble protein and free amino acid were increased by 49.60%, 23.62% and 132.79% respectively, and the nitrate content decreased by 6.18%~46.08%. The synergistic effect was better under ammonium chloride and combined application of organic and inorganic fertilizers. The utilization rates of nitrogen, phosphorus and potassium were increased by 0.63%~7.61%, 0.01%~1.66% and 0.78%~6.49% respectively. The utilization rates were higher under urea and combined application of organic and inorganic fertilizers. [Conclusion]In conclusion, according to the short-term pot experiment, γ-PGA combined with urea or organic-inorganic fertilizer was recommended in agricultural production, and the dosage of γ-PGA was 4.3 mg/kg soil.

CLC Number: