Abstract
The present investigation was executed at Agricultural Research Field, Noakahali Science and Technology University, Noakhali, Bangladesh to access the effects of variety and integrated application of vermicompost, biochar and urea on efficiency of boro rice yield. The experiment was accomplished during the period from November 2018 to May 2019. It was completed in a randomized complete block design (RCBD) with three replications. The treatments assigned in a factorial arrangement of 2 × 4, with 2 varieties of rice (V1-BINA dhan 8, V2- BINA dhan 10) and 4 integration of vermicompost, biochar, and urea (T1: Vermicompost-2.5 t ha-1, T2: Vermicompost-2 t ha-1+ Biochar 0.5 t ha-1, T3: Vermicompost-1.5 t ha-1+ Biochar 1 t ha-1 and T4: Vermicompost-1.5 t ha-1 + Urea-150kg ha-1/0.15 t ha-1). Data were collected to analyze growth and yield contributing characters of boro rice. All the parameters were not statistically significant to differ. According to variety highest grain (3.73 t ha-1) and straw (2.8 t ha-1) yield was found from BINA dhan 10 in comparison with BINA dhan 8. In case of integrated application of vermicompost, biochar and urea, superior grain and straw yield were obtained from T4: Vermicompost-1.5 t ha-1 + Urea-0.15 t ha-1 whereas lowest grain yield (3.01 t ha-1 recorded from integrated application vermicompost and biochar. In combine maximum grain (4.92 t ha-1) and straw (4.40 t ha-1) yield was noted from BINA dhan 10 alone with integrated application of vermicompost and urea whereas the lowest data (grain: 2.50 t ha-1; straw: 1.64 t ha-1) was found from BINA dhan 8 along with vermicompost and biochar.
Highlights
Rice (Oryza sativa L.) is one of the most important and staple food crops in Bangladesh
Considering the points, the motive of this study was to determine the positive influence of vermicompost on growth and yield contributing characters of boro rice varieties improved by the addition of biochar and urea
Fertilization Fertilizers were applied at the basal with vermicompost, bichar, triple superphosphate (TSP) and muriate of potash (MP) at the specific plot according to the layout of randomized complete block design (RCBD) design and urea was applied as top dressing in three equal splits at [15, 30] and 45 days after transplanting (DAT)
Summary
Boro rice comprising approximately 41.94% of the total rice growing area (BBS, 2018). Most of the irrigated fertile lands have declined soil fertility in general and soil organic carbon (SOC) content in particular due to continuous cultivation of this highly exhaustive cropping sequence. For this reason, total productivity factor greatly reduced as well as raised questions on the sustainability of this cropping system. Growth and yield of boro rice varieties were greatly enhanced by different vermicompost combination with biochar and urea. Considering the points, the motive of this study was to determine the positive influence of vermicompost on growth and yield contributing characters of boro rice varieties improved by the addition of biochar and urea
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