A field experiment was conducted to evaluate the integrated effect of cow dung, poultry manure and water hyacinth with chemical fertilizers on the growth and yield of Boro rice (cv. BRRI dhan29). The effect of different levels of organic fertilizers in combination with recommended doses of inorganic fertilizers were tested over growth parameters and yield of rice.Among the yield contributing characters studied plant height, effective tillers hill-1 , panicle length and filled grains panicle-1 were varied significantly by the different treatments. Most of the yield contributing characters influenced positively in treatment having quarter doses of cow dung, poultry manure and water hyacinth over recommended dose. The highest grain yield (5.58 t/ha)and straw yield (7.28 t/ha) were observed in that same treatmentT6 (1/3 Cow dung + 1/3 Poultry Manure + 1/3 water hyacinth + Fertilizers) over other treatments. Thus, the application of cow dung, poultry manure and water hyacinth with chemical fertilizers had significant and positive effect on N, P, K and S contents of rice.
Soil salinity is an increasing problem in the world and main obstacle to agricultural productivity especially in areas where irrigation is necessary. It adversely affects plant growth and development. Adoption of salt tolerant variety is more important here and so screening of salt tolerant germplasms is essential. For this reason, a germination test under salinity and a hydroponic experiment were conducted at Plant Physiology Laboratory, Department of Crop Botany, Bangladesh Agricultural University, Mymensingh to investigate the effect of NaCl on germination, morphological characters and growth of sorghum seedlings. The experiment comprised of two levels of NaCl concentration viz. Control (without NaCl and EC 1.36 dSm −1 in hydroponic culture) and 80 mM NaCl and five sorghum germplasms viz. BD 700, BD 703, BD 707, BD 710 and BD 726. There were 10 (5×2) treatments in a completely randomized design (CRD) with three replications. Results showed that germination percentage, hypocotyls and epicotyls length, root and shoot length, leaf length, leaf sheath length, fresh and dry mass production were influenced by NaCl stress. However, among tested germplasms, BD 707 showed the best performance considering the seedlings growth, germination percentage and other parameters. BD 710 and BD 703 showed the highest sensitivity to NaCl stress based on the above parameters studied. These results suggested that sorghum is able to grow with moderate salinity.
Based on the 36 quantitative morphological descriptors, agglomerative hierarchical clustering (AHC) and principal component analyses (PCA) were conducted to identify 106 diverse Sesbania accessions. The AHC analysis identified three major clusters with 11 sub-clusters. In PCA, the first and second PCs explain 72.48% and 12.72% of total variations with high Eigen value 9.1 and 1.7, respectively. Sesbania accessions occupied four distinct positions in the PCA graph. Based on multivariate analyses and qualitative descriptors, Sesbania accessions have been identified as S. bispinosa (90 accessions), S. cannabina (9 accessions), S. sesban (6 accessions) and the known S. rostrata. The AHC dendrogram has detected the close similarities between S. rostrata and S. cannabina. However, the PCA has emerged to be better than the AHC as a species identification tool. Among these four species, the highest discriminating distance (23.69%) was observed between S. sesban and S. bispinosa, and the lowest (10.52%) was in S. bispinosa and S. cannabina. Bangladesh J. Sci. Ind. Res.55(3), 215-220, 2020
The study was conducted at the experimental field of Horticulture Research Centre, BARI, Gazipur during Rabi seasons in three years (2012 to 2015) to investigate the response of broccoli (cv. Premium crop) under different irrigation regimes. The experiment was conducted in RCBD with five replications. There were four treatments: I1=Irrigation up to FC at 5 days interval after plant establishment (PE), I2= Irrigation up to FC at 10 days interval after PE, I3 = Irrigation up to FC at 15 days interval after PE and I4= Irrigation up to FC at 20 days interval after PE. A significant response of broccoli to different irrigation levels was observed. Among the different treatments, I2 (irrigation at 10 days interval) was significantly better yielding (19.98 t/ha, 20.63 t/ha and 16.24 t/ha in 1st, 2nd and 3rd year, respectively). The lowest yields were observed from the treatment I4 each in all 3 years. The highest seasonal water (382.30 mm, 296.58 mm and 305.00 mm in 1st, 2nd and 3rd year) were used in treatment I1 and the lowest (204.60 mm, 185.66 mm and 179.77mm in the 1st, 2nd and 3rd year) were used in treatment I4, I3 and I3, respectively. The results suggest that irrigation at 10 days interval (I2) might be optimum irrigation schedule for broccoli production on the basis of gross return. But in respect of economic profitability, the highest marginal rate of return is obtained from treatment I3.The Agriculturists 2016; 14(1) 98-106
Three separate field experiments were conducted to exploit biomass yield potential of dhaincha (Sesbania species) by different cultural practices. A total of six accessions from three Sesbania species, viz. S. bispinosa (#05, 71, 77 and 109), S. cannabina (#28) and S. sesban (#81), were used as experimental materials. Experimental treatments were population densities, viz. 180, 240 and 300 plants m-2; sowing dates, viz. 30 April, 15 May, 30 May and 15 June, and fertilizer doses, viz. 0 (without N/control), 10, 20 and 30 kg N ha-1. All the experiments were designed following randomized complete block design with three replications. Experiments on population density and sowing dates were conducted in control condition (without any fertilizer application). The N-fertilizer was applied as top dress at 30 days after sowing (DAS) and crops were harvested at 60 DAS. The maximum biomass (10.07 t ha-1) was obtained from 240 plants m-2. At 30 April sowing, plants produced the tallest height (199.69 cm), widest base diameter (1.02 cm), highest fresh weight (62.07 t ha-1) and biomass yield (14.73 t ha-1). There were no significant differences in biomass yield and yield contributing descriptors between 20 and 30 kg N ha-1. Among the species, S. bispinosa was the best performer in terms of biomass yield and yield contributing descriptors. It may be concluded that S. bispinosa (accession #71) could be cultivated with the population density 240 plants m-2, at 30 April, without any fertilizer application. In case of later sowing/cultivation, the 20 kg N ha-1 could be applied for the maximization of biomass yield.
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