Vol. 7, Issue 4 (2019)
Effect of long-term nutrient management on potassium dynamics in calcareous (Vertic haplustepts) soil
Author(s): Sumara MS, Rajani AV and Jadeja AS
Abstract: A field experiment was conducted at instructional Farm, Junagadh Agricultural University, Junagadh to bring about the effect of long-term nutrient management on potassium dynamics in calcareous (Vertic Haplustepts) soil. An experiment was comprised with twelve treatments in RBD design with three replication. The result revealed that the application of FYM maintained or increased potassium status of LTFE soils. In treatments of FYM (T8 and T9), the status of potassium fractions increased. There was overall decrease in available-K2O status of LTFE soils after 18 year, except in treatments which received FYM (T8 and T9), where K2O status of soil increased as compared to initial status. Water soluble-K also decreased in LTFE soil after a span of 18 years, except in treatments which received FYM (T8 and T9). Same results were also recorded in case of exchangeable-K, HNO3 soluble-K, reserve-K and total-K, here also approved that for maintaining K fertility of soil at long run, it is essential to add organic fertilizer with inorganic ones for maintaining available potassium level in soil, application of organic manure is essential. In fact, all fractions of potassium decreased after a long run in intensive cropping of LTFE soils without addition of FYM. So it is alarming us to use organic fertilizer with inorganic one for maintaining K fertility status of soil in long run. At initial stage of experiment (1st year) available-K2O status of LTFE soils showed high category (> 280 kg K2O ha-1), but after long run (18 year) it decreased to medium category (140-280 kg K2O ha-1), except in treatment of FYM application (T8 and T9), where increment in K2O level was found rather than its depletion. Further it was established that, FYM is essential for maintaining soil fertility at long run. Similar results were also recorded in case of all other fractions of potassium.
Pages: 1053-1058 | 273 Views 43 Downloads
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How to cite this article:
Sumara MS, Rajani AV, Jadeja AS. Effect of long-term nutrient management on potassium dynamics in calcareous (Vertic haplustepts) soil. Int J Chem Stud 2019;7(4):1053-1058.
