Abstract
The present study was done at Bangladesh Agricultural University farm to evaluate the field performances of different types of manures viz. cowdung (CD), cowdung slurry (CD slurry), trichocompost (TC), vermicompost (VC), poultry manure (PM) and poultry manure slurry (PM slurry) with chemical fertilizers in the potato-mungbean-T. aman rice cropping pattern during 2011-12 and 2012-13. The experiment was laid out in a randomized complete block design, with three replications and eight treatments including T1 (Control), T2 [HYG based 100% chemical fertilizer (CF)], T3 [CD + CF (IPNS basis)], T4 [CD slurry + CF (IPNS basis)], T5 [PM + CF (IPNS basis)], T6 [PM slurry + CF (IPNS basis)], T7 [TC + CF (IPNS basis)] and T8 [VC + CF (IPNS basis)]. Trichocompost + CF and vermicompost + CF containing treatments produced higher crop yield followed by poultry manure slurry and cowdung slurry. Integrated use of manures and fertilizers gave on an average 6.7-33.7%, 8.3-33.8% and 2.9-18.3% yield increase in potato, mungbean and T. aman rice, respectively over sole application of chemical fertilizers (data not shown). Use of IPNS improved nutrient content and uptake of mungbean. The present study thus indicates that use of manure, especially trichocompost, vermicompost, PM slurry and CD slurry integrated with chemical fertilizers would help increase crop yield and improve soil fertility. However, Trichocompost + CF was the best option in this regard.
 SAARC J. Agri., 16(2): 167-179 (2018)
Highlights
IntroductionThe ricerice cropping pattern, causes a considerable depletion of soil nutrients threatening long-term productivity
Agriculture is the mainstay of economy in terms of contribution to GDP as well as improvement of livelihood of majority people in Bangladesh
The experiment consisted of eight treatments viz. T1= Control, T2 = 100% chemical fertilizer (CF), T3 = CD + CF, T4= CD slurry + CF, T5= poultry manure (PM) + CF, T6= PM slurry + CF, T7= TC + CF, T8= VC + CF
Summary
The ricerice cropping pattern, causes a considerable depletion of soil nutrients threatening long-term productivity. Sustainable crop production in Bangladesh through improvement of cropping pattern in rice based cropping system is regarded as increasingly important in national issues such as food security, poverty alleviation, land degradation and pollution control (Rahman et al, 2018). Short lived leguminous mungbean plants can be grown in various cropping patterns because they have the ability to adapt environmental stresses like drought, low soil fertility etc (Bourgault et al, 2010) and the inclusion of a grain legume in the cropping pattern will supply substantial amount of biomass and N to soil and improve soil fertility and crop productivity on sustainable basis (Ali et al, 2012)
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