International Journal of Chemical Studies
Vol. 5, Issue 4 (2017)
Long term effect of integrated nutrient management on soil nutrient status under rice-wheat cropping system in Inceptisols
Author(s): Neha Gawde, Anup Kumar Singh, Sunil Kumar Agrawal and Rahul Kumar
Abstract: The present experiment “Long term effect of integrated nutrient management on soil nutrient status under rice-wheat cropping system in Inceptisols” was carried out during Kharif-Rabi season of 2015 - 2016 at the instructional cum research farm, IGKV, Raipur. The objectives of the study were the long term effect of INM on soil major nutrient status after 24th crop cycle under rice-wheat cropping system, to find out the best INM practice on the basis of cropping system productivity and economics. The experiment was laid out in Randomized block design and replicated three times with twelve treatments i.e. T1 (control), T2 - 50%RDF-50RDF%, T3 - 50%RDF-100%RDF, T4 - 75%RDF-75%RDF, T5 - 100%RDF-100%RDF, T6 - 50%RDF+50%FYM-100%RDF, T7 - 75%RDF+25%FYM-75%RDF, T8 - 50%RDF+50%RR-100%RDF, T9 - 75%RDF+25%RR-75%RDF, T10 - 50%RDF+50%GM-100%RDF, T11 - 75%RDF+25%GM-75%RDF, T12 - FP-FP. Result revealed that combined application of inorganic fertilizer and organic manure during kharif and rabi improve chemical properties of soil like organic carbon, available N, P and K status in soil. The highest available nitrogen (288.6 kg ha-1) and available phosphorus (28.5 kg ha-1) content was recorded in T10 - 50%RDF+50%GM-100%RDF. The higher available calcium and sulphur was recorded in T6 -50%RDF+50%FYM-100%RDF, treatment. The available micronutrient was observed in T6 - 50%RDF+50%FYM-100%RDF. Maximum number (448.67 m-2) of effective tiller and test weight (46.19g) was recorded in T10 - 50%RDF+50%FYM-100%RDF. The yield of rice and wheat increased with increasing the levels of mineral nutrients from Treatment T10 - 50%RDF+50%FYM-100%RDF highest grain yield (61.25 Q ha-1) of rice and wheat (31.46 Q ha-1) was significantly superior. The Harvest index was observed highest (41.64%) in T3-50%RDF-100%RDF NPK. Agronomic efficiency was recorded maximum (51.31 kg kg-1) under T10 - 50%RDF+50GM-100%RDF. The Factor productivity index was observed highest (62.91) under T10 - 50%RDF-50GM-100%RDF. Harvest index of these treatments was also higher. These results are also reflected in the net return and B: C ratio. Maximum total productivity (TP) in terms of rice equivalent yield (98.35q/ha) was recorded under treatment 100% RDF + 100% RDF during both kharif and rabi (T5). The per cent change in TP in terms of rice equivalent yield (q/ha) and total net return (Kharif +Rabi) over farmer’s practice were also highest 70.33% and Rs. 59,198/ha, respectively) under treatment 100% RDF + 100% RDF during both kharif and rabi (T5) followed by 50% RDF+50% N through GM during kharif and 100% RDF during rabi (T10) (64.60% and Rs 53,908 /ha, respectively).
Pages: 1050-1057 | 838 Views 17 Downloads
How to cite this article:
Neha Gawde, Anup Kumar Singh, Sunil Kumar Agrawal, Rahul Kumar. Long term effect of integrated nutrient management on soil nutrient status under rice-wheat cropping system in Inceptisols. Int J Chem Stud 2017;5(4):1050-1057.