Effect of Nitrogen Fertilization on Growth and Forage Yield of Sorghum [Sorghum bicolor (L.) Moench.] Under Takhar Agro-Ecological Conditions

Year 2020, Volume: 1 Issue: 2, 66 - 71, 31.12.2020

Mohammad Safar Noorı

Abstract

A field experiment was carried out at Bagh-e-Zakhera research station, Takhar province of Afghanistan during 2020 to assess the effects of nitrogen (N) fertilization on growth and forage yield of sorghum under Takhar agro-ecological conditions. The experiment was laid out in Randomized Complete Block Design, using 4 replications. There were four levels of nitrogen N1 (control), N2 (50 kg N ha-1), N3 (75 kg N ha-1), and N4 (100 kg N ha-1). The result of this research indicated that N fertilization significantly increased all growth parameters and forage yield of sorghum over control. Among the different levels of N fertilizer, application of 100 kg N ha-1 (N4) significantly enhanced the growth parameters such as plant height (245.26 cm), number of leaves (10.15 plant-1), leaf area (3536.80 cm hill-1), dry matter accumulation (240.10 g plant-1 ) at 90 days after sowing. Whereas, no significant differences were detected with N4 and N3 treatments for stover yield. The crop growth rate of sorghum was significantly influenced by N fertilization, and the highest value for crop growth rate (69.09 g plant-1 day-1) was obtained with N4 treatment. From the results of this study, it was concluded that the growth and forage yield of sorghum can be enhanced with the application of 100kg of N ha-1 under agro-ecological conditions of Takhar province of Afghanistan.

Keywords

Biomass, crop growth rate, Dry matter accumulation, Forage, Sorghum

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