Effects of P and K Combined Fertilization on the Yield of Alfalfa

doi:10.7668/hbnxb.2008.S2.073

Abstract

Abstract: The combined fertilizat ion experiments were carried out in Beijing area from 2003 year to 2005 year.Twoparameter msplitting plot design was used to determine the effects of combinat ions of N, P on fresh yield, dry yield and the mratio of stem/ leaf in alfalfa. Experiments showed that combined fertilization could signif icantly elevate yield of alfalfa, The mhighest yield was gained when fertilizing 45. 8 kg/ ha P2O5 and 12. 5 kg/ ha K2O. The fresh yield of 2004 year and 2005m year were 67 900. 5 kg/ ha and 97 320 kg/ ha, higher 19. 3%, 10. 7% than CK, and the dry yield of 2004 year and 2005 myear were 18 870 kg/ ha and 22 999. 5 kg/ ha, higher 22. 9% and 23% than CK.ANOVA analysis showed that there was msignificantly differences on fresh yield, dry yield and the ratio of stem/ leaf under different combinations at the 0. 05 level.

Key words: Combined fert ilization, Alfalfa, Fresh yield, Dry yield

CLC Number:

S147.2

LI Yuan, WANG Zan, GAO Hong-wen, LIU Gui-bo. Effects of P and K Combined Fertilization on the Yield of Alfalfa[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(S2): 315-318. doi: 10.7668/hbnxb.2008.S2.073.

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