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Foliar Fertilization of Nitrogen in Mungbean: Influence of Rate and Frequency of Application

Abdul Hamid
Department of Agronomy, Institute of Postgraduate Studies in Agriculture, Salna, Gazipur 1703, Bangladesh.

Abstract/ Executive Summary:

The influence of rate and frequency of foliar N fertilization on the yield performance and nutrient uptake of mungbean had been evaluated In a series of experiments. Foliar applied N generally Increased seed yield over the untreated control excepting the treatment with 20 mg N I^-1. A concentration of 10 mg N I^-1 was most beneficial to pod and seed development than the higher or lower concentrations. Spraying N at around flowering caused significant yield increase but application twice (at around flowering and at late reproductive phase) gave significantly greater seed yield than any single application. Field experiment also confirmed that foliar N at 10 mg I^-lapplied twice In the reproductive phase gave greater yield advantage.

Keywords: Foliar fertilization, Nitrogen, Mungbean

Location: Department of Agronomy, Institute of Postgraduate Studies in Agriculture, Salna, Gazipur

Start Date: 15-06-1988

End Date: 30-11-1989

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer

Objectives:

To evaluate the effect of foliar application of urea and to determine the optimal concentration of N in urea solution and growth stage of mungbean when to spray nutrient solution for optimizing seed yield.

Methodology:

Two pot experiments and one field experiment using mungbean (cv. Mubarik) were conducted in this study. Seeds were planted in base perforated 22 em diameter pots filled with 5 kg soil. The soil used was taken from Ap horizon of a Grey Terrace soil (Typic Haplaquept) obtained from the Institute of Postgraduate Studies in Agriculture farm, Salna, Gazipur, Bangladesh, The soil was poorly drained and slightly acidic (pH 5.5) having low organic matter (1.12%) and nitrogen (0.08%) contents with CEC of 8.25 meq/100 g. In each pot a basal dose of 120 mg N, 70 mg P, and 130 mg K in the form of urea, triple super phosphate, and muriate of potash, respectively was incorporated into the soil one day prior to sowing. Five to six seeds were planted in each pot. The plants were kept in a vinyl house and grown in dry season. At the first trifoliate stage, 10 days after emergence (DAE), plants were thinned to retain two healthy plants per pot. Plants were regularly irrigated in order to avoid water stress.

Source of Information: Annals B. Agric. l (1): 33- 39, 1991

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Mungbean is usually grown under low fertility level and as a result the crop often encounters nutrient stress including nitrogen deficiency particularly in the reproductive stage. The small sta.rter dose of N perhaps is of little use in view of slow growth at the early vegetative phase (Kuo et al., 1978) and it is unlikely that basally applied N is taken up by the plant during the reproductive stage when N demand is the highest Moreover, mungbean's ability to fix atmospheric nitrogen is reported to be the lowest among the grain legumes (Rachie and Roberts, I 974). In an earlier report we (Hamid, 1988) showed that mungbean responded favorably to the application of N during the post-flowering phase. Response to foliar N fertilization in this study indicates that supplemental N application during the reproductive development might be essential for achieving optimum growth and yield production of mungbean.

Knowledge Management: Journal