Brown manuring has emerged as a promising, eco-friendly
strategy to address weed infestation and improve crop productivity in direct
wet-seeded rice systems. The present study was conducted during the kharif
season of 2024 at the International South Farm, Karunya Institute of Technology
and Sciences, Coimbatore, to evaluate the influence of brown manuring on crop
growth, physiological performance, and yield of rice. A field experiment was
laid out in a Randomised Block Design with ten treatments and three replications,
involving rice alone and rice in association with dhaincha (Sesbania aculeata)
under different management practices.
The findings revealed that growth and physiological
attributes did not vary significantly among treatments at 30 DAS. However, at
60, 90 DAS and at harvest, the weed-free check (T9) consistently recorded
superior plant height, tiller density, no. of leaves, dry matter production,
leaf area index, crop growth rate, and relative growth rate. Grain and straw
yields were also highest under T9 (6046 and 10801 kg ha-1, respectively), but
were statistically on par with T6 (pretilachlor 50% EC at 1.25 L ha-1+
knockdown of dhaincha using 2,4-D 38% EC at 1 kg ha-1 at 30 DAS). In contrast,
the unweeded control (T10) produced the lowest growth and yield parameters.
This study confirms that combining brown manuring with
selective herbicide use effectively suppresses weeds, improves crop vigour
through dhaincha residue decomposition, and enhances yield in direct wet-seeded
rice. These findings position brown manuring as a promising, sustainable
practice for integrated weed and nutrient management in resource-efficient rice
systems.
Author(s) Details
Samyuktha C
Division of Agronomy, School of Agricultural Science, Karunya Institute of
Technology and Sciences, Coimbatore, India.
Please see the book here :- https://doi.org/10.9734/bpi/asti/v4/6307
No comments:
Post a Comment