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Title: | Measuring potassium fractions is not sufficient to assess the long-term impact of fertilization and manuring on soil’s potassium supplying capacity |
Other Titles: | Not Available |
Authors: | Das Debarup, Nayak A K *, Thilagam VK, Chatterjee D, Shahid M, Tripathi Rahul, Mohanty S, Kumar A, Lal B, Gautam P, Panda BB, Biswas SS |
ICAR Data Use Licennce: | http://krishi.icar.gov.in/PDF/ICAR_Data_Use_Licence.pdf |
Author's Affiliated institute: | ICAR::Indian Agricultural Research Institute ICAR::National Rice Research Institute ICAR::Indian Institute of Soil and Water Conservation |
Published/ Complete Date: | 2018-01-29 |
Project Code: | 2.1 |
Keywords: | Fixation capacity . Fixation threshold concentration . Long-term fertilizer experiment . Q/I relationship . Release kinetics . Release threshold concentration |
Publisher: | Springer |
Citation: | Das Debarup, Nayak A K *, Thilagam VK, Chatterjee D, Shahid M, Tripathi Rahul, Mohanty S, Kumar A, Lal B, Gautam P, Panda BB, Biswas SS. 2018. Measuring potassium fractions is not sufficient to assess the long-term impact of fertilization and manuring on soil’s potassium supplying capacity. Journal of Soils and Sediments. P 1-15 |
Series/Report no.: | Not Available; |
Abstract/Description: | Purpose Potassium (K)-fractions, thresholds of K release and fixation, quantity-intensity (Q/I) parameters of K, K-release kinetics, and K-fixation capacity were compared for their effectiveness in differentiating the effect of various nutrient management practices on K supplying capacity of an Aeric Endoaquept soil after 45 years of puddled rice cultivation. Materials and methods Soil samples (0–15 cm) were collected after the completion of 45 rice-rice cycles from an on-going longterm fertilizer experiment located in ICAR-National Rice Research Institute, Cuttack, India. The treatments involved control (unfertilized), N (nitrogen fertilizer), NP (N+ phosphorus fertilizer), NK (N+ potassium fertilizer), NPK (N + P + K fertilizer), FYM (farmyard manure), N + FYM, NP + FYM, NK + FYM, and NPK + FYM. Results and discussion Rice cultivation without K fertilizer application resulted in lower values of soil K parameters than the Kfertilized treatments. Treatment effects were most prominent on release threshold concentration (RTC), followed by cumulativeK release, K-release rate constants, and K-fixation capacity. Parameters of K-release kinetics and Q/I relationships showed better correlation with rice grain yields than soil-K fractions. Soil K thresholds were closely related with exchangeable (Kex) and nonexchangeable K (Knx), but not clay minerals. Conclusions Among the soil K parameters, RTC, cumulative K release (Kf) with 0.01MCaCl2, release rate constants (bR and bS) of parabolic diffusion equation, and K-fixation capacity were most effective in revealing the nutrient management induced variations in soil K fertility. In the studied soil, K-thresholds were significantly related to Kex and Knx. |
Description: | Not Available |
Type(s) of content: | Research Paper |
Sponsors: | ICAR |
Language: | English |
Name of Journal: | Journal of Soils and Sediments |
Page Number: | 1-15 |
Name of the Division/Regional Station: | Crop Production Division |
Source, DOI or any other URL: | (https://doi.org/10.1007/s11368-018-1922-6) |
URI: | (https://doi.org/10.1007/s11368-018-1922-6) http://krishi.icar.gov.in/jspui/handle/123456789/14631 |
Appears in Collections: | CS-NRRI-Publication |
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