S. Bilkis
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
M.R. Islam*
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
M. Jahiruddin
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
M. M. Rahman
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
T.S. Hoque
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
Cowdung, Poultry manure, Trichocompost, Vermicompost, Slurry, Mungbean, Crop yield, Soil fertility
Soil Science Field Laboratory of Bangladesh Agricultural University (BAU), Mymensingh, Bangladesh for two consecutive years, 2011-12 and 2012-13
Crop-Soil-Water Management
Fertilizer, Manures
Experimental site and soil characters of the location The experiment was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University (BAU), Mymensingh, Bangladesh for two consecutive years, 2011-12 and 2012-13, respectively. The soil belongs to Sonatala series under the AEZ-9 (Old Brahmaputra Floodplain) (UNDP and FAO, 1988). The soil was silt loam in texture having pH 6.29, organic matter content 1.85%, total N 0.124%, available P 3.96 ppm, exchangeable K 0.11 me%, available S 11.9 ppm and CEC 12.5 me%. Experimental design, treatments and crops The experiment was laid out in a randomized complete block design, with three replications for first year cycle. The experiment consisted of eight treatments viz. T1= Control (no manure or fertilizer), T2 = 100% chemical fertilizer (CF), T3 = CD + CF, T4= CD slurry + CF, T5= PM + CF, T6= PM slurry + CF, T7= TC + CF, T8= VC + CF. The doses of N-P-K-S were 135-25-95-12 kg/ha for the first crop (potato). The residual effect of manures and fertilizers was evaluated on succeeding mung bean crop. Diamont was used as the variety every year in the experimental plots in the mid-November and harvested in the mid-February. After harvesting of potato, the seeds of mungbean (cv. Binamung 8) were sown on 24 March @ 30 kg ha-1 and harvested at the end of June. Manures and fertilizers application Poultry manure and PM slurry were applied @ 5 t ha-1 where as the rest of the manures (CD, CD slurry, TC and VC) were applied @ 3 t ha-1. Potato received full quantities of urea, TSP, MoP and gypsum during land preparation while rotten cowdung, decomposed poultry manure and compost were applied 7 days before transplanting. The rates of fertilizers for mung bean was calculated and rationalized considering residual effect of plant nutrient (except N) applied to previous crop (potato) (FRG, 2012). Manures were applied to the first crop (potato) and their residual effects were evaluated on the second crop (mung bean). This was repeated for the second year. Data collection At maturity, the crop was harvested and the different data were recorded. Seed and grain yield was recorded on 14% moisture basis and stover yield at sundry basis. Chemical analysis of plant and soil samples The seed and stover samples were collected, dried and ground for analysis of N, P, K and S contents. The ground plant materials were stored in paper bags separately and placed in a desiccators. The total N, available P, exchangeable K and available S of plant samples were determined following semi-micro Kjeldahl method, modified Olsen method, NH4OAc extraction method and CaCl2 extraction method, respectively. After chemical analysis of seed and stover samples of mung bean, the nutrient uptake was calculated from the nutrient content and yield of the crop using the following formula: TU =NC ×Y/100 where, TU = total nutrient uptake (kg ha-1), NC =nutrient concentration (%), and Y = yield (kg ha-1). Statistical analysis Statistical analysis of the data was done by using computer based statistical program Mstat-C (Michigan State University, East Lansing, MI, USA) following the basic principles stated by Gomez and Gomez (1984). Significant effects of treatments were determined by analysis of variance (ANOVA) and Duncan’s Multiple Range Test (DMRT) evaluated the mean comparisons of the treatments at 5% level of significance.omplete two cropping cycles. Intercultural operations Intercultural operations such as weeding, thinning and irrigation were done as and when required.
SAARC J. Agri., 16(2): 167-179 (2018)
Journal