GROWTH AND YIELD OF COWPEA UNDER INTEGRATED NUTRIENT MANAGEMENT PRACTICES

M A S Hossain, M J Miah, H Akter and M F Islam
Journal of the Sylhet Agricultural University, Volume 4, Issue 2, 2017, Pages 191-198

Abstract:

A field experiment was carried out on Chandragonj soil group of AEZ-17 at Gabua, Noakhali to conserve soil fertility through integrated nutrient management practices during November 2012 to April 2013 under integrated nutrient management practices. Cowpea cv. Bari Fallon-1 was cultivated under six fertilizer management practices viz. soil test based chemical fertilizer dose (T1), chemical fertilizer along with cow dung @ 5 t ha-1 (T2), chemical fertilizer along with dhaincha @ 0.6 t ha-1 (T3), chemical fertilizer along with bio-fertilizer inoculums @ 1.6 t ha-1 (T4), farmer’s practice (T5), and control (T6). The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Results was revealed that plant height increased up to 120 days after sowing (DAS) and the highest plant height was found in T4, T2 and T1 practices, followed by T3. The highest branches plant-1 was found in T2, T1, and T3 followed by T4. The highest effective plants plot-1 were found in T3 followed T2 and T6. The nodule numbers plant-1 increased from 45 DAS to 75 DAS and then declined up to 105 DAS where nodule numbers of the T2, T3 and T4 were similar. The highest total fresh weight was found in T4 and T2 practices, whereas the highest total dry matter (TDM) was in T2, followed by T3 and T4 approaches. T5 practice allocated the maximum dry matter into leaves and roots, T2 and T3 allocated into stem, whereas T1, T2 and T4 allocated statistically similar amount of dry matter into pod. The longest pod was in T1 and T4 practices followed by T3 and T2 practices. The highest number of pods plant-1 was in T4 practice followed by T3; while the highest number of seeds pod-1 were in T3, followed by T4 practice. The maximum seed weight plant-1 was in T4, followed by T1, T2, T3 and T6. The highest thousand seed weight was in T1 practice. The highest seed-pod ratio percentage was in T4 and the lowest ratio was in T5. The maximum seed dry weight as well as shoot dry weight plot-1 was in T2, followed by T3. The highest seed-shoot ratio was achieved in T1, followed by T4 and the lowest seed-shoot ratio was found in T5. The highest seed yield was obtained from T3 followed by T2 and T4. Prior to the experiment, total N and available P was below to the critical limit, whereas after conduction of the experiment all of nutrient elements studied was found in increased amount. Results revealed that chemical fertilizer along with dhaincha (Sesbania esculenta) @ 0.6 t ha-1 showed the best seed yield (2.445 t ha-1). Soil test based chemical fertilizer dose and IPNS practices improved the fertility of the soils than farmer’s practice and control. Chemical fertilizer along with cowdung @ 5 t ha-1 practice improved the Zn status of the soil than other practices.

Keywords:

Biological nitrogen fixation, fallon, integrated nutrient management system, biofertilizer inoculums, soil fertility conservation


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M A S Hossain, M J Miah, H Akter and M F Islam. 2017. GROWTH AND YIELD OF COWPEA UNDER INTEGRATED NUTRIENT MANAGEMENT PRACTICES, Journal of the Sylhet Agricultural University 4(2): 191-198.