Effect of fertigation of primary treated biomethanated spentwash along with nitrogen levels on soil micronutrient, heavy metal status, uptake, economics and yield of soybean (Glycine max)– wheat (Triticum aestivum) cropping sequence on Inceptisol Kamble B.M.1,*, Associate Professor, Deshpande A.N.1,**, Former Associate Dean Mahatma Phule Krishi Vidyapeeth, Rahuri, Maharashtra-413 722 1Department of Soil Science and Agricultural Chemistry, Agricultural Research Station, K. Digraj, Sangli 416 305 *Corresponding author Email: bmkamble2007@rediffmail.com
**ajitkumarnagesh@rediffmail.com
Online published on 19 February, 2015. Abstract The field experiment was carried out during the third (2009–10) and fourth years (2010–11), which was initiated in 2007–08 at Rahuri, to study the effect of fertigation of primary treated biomethanated spentwash (PBSW) on micronutrient, heavy metal status of soil and uptake of soybean [Glycine max (L.) Merr.] and wheat [Triticum aestivum (L.) emend. Fiori & Paol.], when grown in a sequence. The treatments comprised recommended dose (RD)-NPK, 100% RD of nitrogen (N) through PBSW with and without phosphorus (P) mineral fertilizer, 25 and 50% RD of N through PBSW + remaining N and P through mineral fertilizers. The application of 25% recommended dose of N through PBSW + remaining N and P through mineral fertilizers increased the total Fe, Zn, Mn and Cu uptake by soybean and wheat, soybean-grain equivalent yield of wheat and benefit: cost ratio compared to 100 and 50% RD-N through PBSW treatments and improved the status DTPA-Fe, Zn, Mn, Cu, Ni, Cd and Pb as compared to RD-NPK at all 3 soil depths. However, heavy metal status values were below the permissible limits. Fertigation of 25% N-PBSW along with mineral fertilizers not only help in improvement of the micronutrient status of soil but also prevent any adverse effect on soil health. Top Keywords Heavy metal, Micronutrients, Soybean, Spentwash, Uptake, Wheat, Yield. Top |