RESPONSE OF ZINC AND BORON ON GROWTH, YIELD AND QUALITY OF BLACK GRAM (Vigna mungo L.)

Abstract

The experiment was conducted at the research field of the Department of Agronomy, SAU, Dhaka–1207 during the period from August, 2012 to December, 2012 to study on the performance of black gram as influenced by the various levels of Zinc (Zn) and Boron (B) fertilizers. The black gram variety cv. BARI Mash–3, four levels of Zn (0, 1.25, 2.50 and 3.75 kg ha –1 ) and five levels of B (0, 0.5, 1.0, 1.5 and 2.0 kg ha ) as soil application were applied in the study. Besides, a blanket dose of N 20 P was used to nourished the plants. The experiment was laid out in two factors split-plot Design with three replications. Result showed that the different levels of Zn and B had significant effect on growth yield and quality parameters of black gram. All the parameters increased with increasing Zn and B levels up to 2.5 kg Zn ha 150 and 1.5 kg B ha –1 and thereafter decreased the values with increasing Zn and B levels except the pod length. Experimental results revealed that, plant height, leaves plant –1 K 50 –1 –1 Kg ha -1 , branches plant , total dry matter, leaf area index, absolute growth rate, relative growth rate and crop growth rate were obtained maximum by the application of 2.50 kg Zn ha and 1.50 kg B ha –1 , respectively. At harvest yield and yield contributing characters viz., grain yield, 1000- seed weight, straw yield, biological yield and harvest index increased significantly by the application of 2.50 kg Zn ha –1 and 1.50 kg B ha –1 , respectively. Similar trend was also found in the quality characters such as N, P, K and S content of black gram seed

–1compare with other treatment combinations. Among the all above characters were perform lower in control treatment. These results indicated that the application of 2.5 kg Zn ha –1 or 1.5 kg B ha –1 would be optimum level for maximizing the seed yield and quality of black gram under the region of AEZ–28. –1