Determination of the optimum N, P and K fertilizers for sugar beet in Shahrekord

Document Type : Scientific and Research

Authors

1 Sugar beet research department- Esfahan Agricultural Research

2 Chaharmahal BakhtiariAgricultural Research

Abstract

The effects of N, P and K fertilizers on sugar beet yield and quality were assessed by using T4IR cultivar during 1994, 1996 and 1997 at Shahre Kord Agricultural Research Center. In this study for rates of  N (0, 90, 180 , 270 Kgha-1), three rates of P2O5 (0, 90, 120 Kgha-1) fertilizers were evaluated in a factorial experiment using randomized complete block design with three replications. Two other treatments (N180, P90, K120 and N180, P90 K50) also were tested. The results showed that, root yield was affected by different nitrogen rates in every three years and with it’s increasing, root yield increased. I 1995 the maximum root was obtained with 270 kg-1 and were non significant with 180kg  Nha-1 . Therefore in 1994, 1997, 90kg  Nha-1 were non significant with 270kg  Nha-1 . Sugar content decreased as N rate increased from 0 to 270 in each of the three years but brei K and alpha amino N increased. The white sugar yield was affected by N rates and increased as N rates increased and maximum white sugar yield was obtained with 270 kgha-1 in 1996 and it’s difference with 180 kg  Nha-1 was not significant. Therefore in 1994 and 1997   90 kg  Nha-1  showed no difference with 270 kgNha-1 . The effect of P fertilizer on quality and quantity of sugar beet characteristics was non significant. The effect of N×P on root yield, sugar content and other quality characteristics were non significant. Results showed that years had a major effect on sugar beet quality and quantity characteristics. K treatments were non significant. Apparently the soil had provided considerable portion of the plants need for P and k.

Keywords

Journal of Sugar Beet
Volume 14, Issue 1
March 1999
Pages 87-101

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