DEPLETION AND BUILD UP OF POTASSIUM IN A VERTISOL UNDER RICE-WHEAT SYSTEM AFTER ONE CROP CYCLE

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dc.contributor.advisorPATIL, S.K.
dc.contributor.authorBACHKAIYA, VINAY
dc.contributor.otherMISHRA, V.N.
dc.contributor.otherSARAWGI, S.K.
dc.contributor.otherSAXENA, R.R.
dc.date.accessioned2018-02-24T05:34:16Z
dc.date.available2018-02-24T05:34:16Z
dc.date.issued2005
dc.description.abstractDepletion and build up of potassium in a Vertisol under rice-wheat system after one crop cycle, was studied at Instructional Farm in the Department of Soil Science, IGAU, Raipur (C.G.). The objectives of the experiment were (i) to study the crop response to fertilizer K application in rice-wheat cropping system, (ii) to study changes in soil K fractions (iii) monitoring changes in K activity ratio (iv) to monitor potassium balance. The treatments were five graded levels of fertilizer K application (0, 50, 100, 150 and 200 kg K2O ha-1) in four replication using RBD. The amount of all fractions was higher in surface layer (0-15 cm), than that in sub surface layer (15-30 cm). The order of dominance of different forms of potassium in the soil were non-exchangeable K > exchangeable K > available K > water soluble K. The overall changes in different forms of K due to cropping after one crop cycle indicated decreasing trends in available, exchangeable and non-exchangeable K over initial but water soluble fraction did not show such trend. The initial value of total K (water soluble + exchangeable + non-exchangeable K) was 2255 kg ha-1 that increased after rice to 2290 kg ha-1 then decreased to 2123 kg ha-1 after wheat crop. No crop response was observed in terms of yield, content and K uptake of rice and wheat crops. This indicated that K status was sufficient to meet the K requirement of the crops. The negative K balance after one crop cycle indicated that crop removal exceeds K application in all the treatments. Study on changes in K activity ratio revealed that activity ratio increased upto the application of 150 kg K2O ha-1 at both soil depths, however, higher K activity ratio was observed at surface layer than that at subsurface layer.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810041325
dc.keywordsPOTASSIUM, VERTISOL, RICE-WHEAT, CROP CYCLEen_US
dc.language.isoenen_US
dc.pages94 p.en_US
dc.publisherIndira Gandhi Krishi Vishwavidyalaya, Raipuren_US
dc.subSoil Scienceen_US
dc.themeAGRICULTURE, SOIL SCIENCEen_US
dc.these.typeM.Scen_US
dc.titleDEPLETION AND BUILD UP OF POTASSIUM IN A VERTISOL UNDER RICE-WHEAT SYSTEM AFTER ONE CROP CYCLEen_US
dc.typeThesisen_US
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