Indian Journal of Agricultural Research

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Indian Journal of Agricultural Research, volume 47 issue 2 (april 2013) : 130-136

EFFECT OF STRAW MANAGEMENT TECHNIQUES AND HERBICIDES ON SOIL MICROBES IN WHEAT IN RICE- WHEAT SYSTEM

Mandeep Kaur Saini*, R.P. Phutela, U.S. Walia
1Department of Agronomy Punjab Agricultural University, Ludhiana-141 004, India

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Cite article:- Saini* Kaur Mandeep, Phutela R.P., Walia U.S. (2024). EFFECT OF STRAW MANAGEMENT TECHNIQUES AND HERBICIDES ON SOIL MICROBES IN WHEAT IN RICE- WHEAT SYSTEM. Indian Journal of Agricultural Research. 47(2): 130-136. doi: .

ABSTRACT

The effect of herbicides on microbial population of soil as influenced by straw management techniques in wheat was studied in rice-wheat system in IGP at Ludhiana. The experiment was laidout in strip plot design with straw management techniques of wheat in horizontal plots and herbicides in vertical plots. The different straw management techniques were zero till sowing with Happy Seeder (combine harvested), zero till sowing in standing stubbles (loose straw removed), Zero till sowing (complete burning of rice straw), bed sowing (Rice straw removed), conventional tillage (partial burning of rice straw). The weed control treatments were sulfosulfuron 25 g/ha, mesosulfuron + iodosulfuron 12 g/ha and pinoxaden 50 g/ha and unsprayed (control). Microbial counts were recorded in the soil samples taken at 0, 15, 30 and 60 days after spray. The highest population of bacteria, actinomycetes and fungi was observed under zero till sowing with Happy Seeder which was statistically at par with zero till sowing in standing stubbles followed by bed planting and significantly higher than zero till sowing after burning and conventional tillage after partial burning under all observational period. Similarly, the highest microbial population was observed in control plots as compared to those in herbicidal treatments. There was decrease in viable counts of bacteria, actinomycetes and fungi at 15 days after spray as compared to that at zero day after spray. Thereafter, the microbial population started to regain and an increase was observed in counts, indicating reduced toxicity, probably due to degradation of herbicidal chemicals.

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