National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
An experiment was conducted in the laboratory of department of Soil Science, Assam Agricultural University, Assam (India) during November 2018 to April 2019 to evaluate inorganic nitrogen fractions, forms of acidity and fertility status in a rice soil as influenced by rice stubble (RS) management practices through a fifteen weeks incubation period under constant moisture regime. Untreated and glyphosate-yogurt treated rice stubble was either incorporated or left on the surface of soil-filled (15 cm depth on 5 cm sand at the bottom) poly vinyl chloride (PVC) pipe (25 cm long and 8.44 cm diameter), mounted on tray maintaining a constant water depth of 5 cm and incubated for 105 days. Incorporation of rice stubble treated with glyphosate-yogurt mixture significantly increased NH4-N in soil compared to all other treatments, but the NO3-N in soil was affected neither by incorporation nor microbe culture spray. The variation in soil pH was not significant among the treatments except at 105 days after incubation. Incorporation of rice stubble, irrespective of glyphosate-yogurt treatment, significantly increased exchange acidity and total acidity in soil after 42 days of incubation. The total potential acidity in soil did not vary significantly throughout the study period. The exchangeable Ca2+, Mg2+ and K+ in soil increased significantly due to rice stubble incorporation with or without glyphosate-yogurt treatment, but the effect was not observed for cation exchange capacity of soil. Incorporation of rice stubble significantly increased available P and K contents in soil, irrespective of glyphosate-yogurt treatment.
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