Impact of Manures, Fertilizers, and Rice Straw Allelopathy on T. aman Rice Yield

Abstract

Nowadays, adopting agricultural practices that are sustainable and eco-friendly for crop production is a major concern. The present experiment was conducted at the AFLAB of BAU from June 2022 to November 2022 to estimate the combined effect of manures and fertilizers with rice straw allelopathy on the yield performance of transplant aman rice. The experiment consisted of two cultivars i.e.: BRRI dhan71 (V1) and BRRI dhan49 (V2) and eight treatments of the combination of rice straw, manures, and fertilizers such as Control (T1), Recommended doses of NPKS (T2), Rice straw @ 1.5 t ha-1 + Cow dung @ 5 t ha-1 (T3),  Rice straw @ 1.5 t ha-1 + Cow dung @ 2.5 t ha-1 + 50% less of recommended doses of NPKS (T4 ), Rice straw @ 1.5 t ha-1 + Vermicompost @ 5 t ha-1 (T5) , Rice straw @ 1.5 t ha-1 + Vermicompost @ 2.5 t ha-1 + 50% less of recommended doses of NPKS (T6), Rice straw @ 1.5 t ha-1 + Trichocompost @ 10 t ha-1 (T7), Rice straw @ 1.5 t ha-1 + Trichocompost @ 5 t ha-1 + 50% less of recommended doses of NPKS (T8). The grain yield as well as the yield contributing characters such as the number of effective tillers hill-1, number of grains panicle-1, 1000-grain weight was highest at BRRI dhan71 with Rice straw @ 1.5 t ha-1 + Vermicompost @ 2.5 t ha-1 + 50% less of recommended doses of NPKS (T6) treatment, followed by Rice straw @ 1.5 t ha-1 + Trichocompost @ 10 t ha-1 (T7) treatment. BRRI dhan71 expressed superiority at yield and all the yield contributing characters than BRRI dhan49. This current study's results indicate that combining rice straw with manures and fertilizer could enhance the yield of transplant aman rice. As a result, mixing rice straws with manures and fertilizers could be a viable bundle of sustainable and eco-friendly ways for increasing crop productivity in the future.