Response of integrated fertilizer and weed management on weed occurrence and growth traits of aromatic Boro rice
https://doi.org/10.26832/24566632.2020.0503015
Abstract
An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh to study the effect of integrated fertilizer and weed management on the growth performance of aromatic Boro rice (cv. BRRI dhan50). The experiment comprised six fertilizer managements viz., control (no manures and no fertilizers), recommended dose of inorganic fertilizers (i.e. Urea, TSP, MoP, Gypsum, ZnSO4 @ 250, 120, 120, 100, 10 kg ha-1, respectively), 50% of recommended dose of inorganic fertilizers + cowdung @ 5 t ha-1, 75% of recommended dose of inorganic fertilizers + cowdung @ 5 t ha-1, 50% of recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha-1, and 75% of recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha-1 and four weed managements viz., control (no weeding), pre-emergence herbicide, Panida 33 EC @ 2.5 l ha-1 + one hand weeding at 35 DAT, post-emergence herbicide, Granite 240 SC @ 93.70 ml ha-1 + one hand weeding at 35 DAT, pre-emergence herbicide, Panida 33 EC @ 2.5 l ha-1 + post-emergence herbicide, Granite 240 SC @ 93.70 ml ha-1. The experiment was laid out in a factorial randomized complete block design with three replications. Growth traits of aromatic Boro rice (cv. BRRI dhan50) were significantly influenced by integrated fertilizer and weed management. Plant height, number of tillers hill-1, total dry matter, leaf area index (LAI) and crop growth rate (CGR) gave their highest values in 75% of recommended dose of inorganic fertilizers and poultry manure @ 2.5 t ha-1 along with pre-emergence herbicide, Panida 33 EC @ 2.5 l ha-1 + post-emergence herbicide, Granite 240 SC @ 93.70 ml ha-1 while their corresponding lowest values were found in control. So it can be concluded that, the interaction of 75% of recommended dose of inorganic fertilizers and poultry manure @ 2.5 t ha-1 along with pre-emergence herbicide (Panida 33 EC @ 2.5 l ha-1) + post-emergence herbicide (Granite 240 SC @ 93.70 ml ha-1) appears as the promising combination in respect of growth performance of aromatic Boro rice (cv. BRRI dhan50).
Keywords:
Aromatic Boro rice, Growth, Integrated fertilizer, Herbicides, Weed managementDownloads
References
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