EFFECT OF NITROGEN AND SULPHUR ON THE GROWTH, YIELD AND QUALITY OF BORO RICE



For evaluating nitrogen sulphur effect on boro rice an experiment conducted in SAU in 2007. BRRI dhan 28 was  used as the crop in this experiment. That was laid out in randomised block design (RCBD). There were twelve  treartment combinations comprisng four levels of  N  (0,120,140, 160  kg  ha-1 designated as N0, N1, N2, N3 and three levels S( 0,20,30 kg S ha-1).


Designated as S0, S1,S2. There was positive impact of each nutrient and their  interaction on yield, yield parametres and nutrient contents of  boro rice  BRRI dhan 28 with increasing rate of nitrogen and sulphur. In case of individual effect of nitrogen the maximum plant height (87.4 cm) was observed  N2 (140 kg N ha-1) treatment  and number off filled grain panicle-1 (102.8) and grain yield (6.9 t ha-1ha-1) were recorded in N3  (160 kg ha-1 ) treatment. The straw yields were almost similar in different levels of N except N0 treatment. Application of 30 kg S ha-1 produced the highest number of  effective tillers hill-1 (11.9) filled grains panicle-1 (90.1) sraw yield   (7.8 t ha-1) and grain yield (6.5 t  ha-1). There  was  no single significant effect of  S on plant height and 1000-grain weight of BRRI dhan 28. The treatment combination  of  N3S2 (160 kg N ha-1+ 30 kg S ha-1) performed better than other  treatments in present trial  considering  number of  filled grains panicle-1, grain and straw yield of Boro rice BRRI dhan 28. The uptake and concentration of N,P,K and  S in grain and straw in increased with the increase levels of  N and S. The   post harvest soils 0f N3S2 (kg N ha-1+ 30 kg S ha-1) resulted the highest total N and available S content. From the view point of grain yield, nutrient concentretion and the quallity of post harvest soil s , the treatment combination of  N3S2  kg N (ha-1+ 30 kg S ha-1) was considered to be the suitable dose of fertilizer for boro rice in Deep Red Brown Terrace Soil.

Rice (Oryzasativa L.) is widely grown in tropical and subtropical regions (Singh et al., 2012). It is staple food of not only Bangladesh but also for India and South Asia. According to IRRI, 2009, rice is the staple food of more than three billion people in the world, most of who live in Asia. It is important energy source of more than half of the world and 65% of the Indian population (Liu et al., 2008). Globally, rice is grown on 153Mha (FAO, 2006), though its production and consumption is concentrated in Asia, where more than 90% of all rice is consumed.

Global rice utilization in 2012/13 is predicted to rise by 1.5 percent to 476 million tonnes, 1 million tonnes more than last anticipated. The bulk, or 85 percent, is to be consumed as food with per capita food intake up from 56.7 kg in 2011/12 to 56.9 kg in 2012/13. This increase would be facilitated in countries such as Bangladesh by declining domestic prices from last year, although, by-and-large, rice consumer prices continue to stand higher year-on-year in nominal terms. (FAO Rice Market Monitor, November 2013)

Since the last issue of the RMM, officials in Bangladesh have released less buoyant estimates of the 2012 Aus harvest, now assessed to have contracted to 3.2 million tonnes (2.16 million tonnes, milled basis). The Government of Bangladesh has, however, announced that it would procure 300 000 tonnes of Aman rice between 9 December 2012 and 28 February 2013, in a bid to support producers at harvest time. The campaign is targeting to absorb 250 000 tonnes of parboiled rice at a price of Taka 26 per kilo (USD321 per tonne) and 50 000 tonnes of white rice at Taka 25 per kilo (USD 309 per tonne). On the whole, FAO now anticipates Bangladesh to gather 50.7 million tonnes (33.8 million tonnes, milled basis) this season, unchanged from 2011 and short of the year’s official target of 52.4 million tonnes (34.95 million tonnes, milled basis)(FAO, 2013).
 

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