National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The study was conducted at Assam Agricultural University, Jorhat in 2014-15 and 2015-16 to study the nutrient uptake and balance as influence by intercropping and integrated nutrient management in rice fallow. The treatment of the experiment comprised of four main plot treatments of sole crop oat, sole crop pea, different row proportion of oat and pea i.e. 3:2 and 3:3 along with four combinations of nutrient management viz. RDF (inorganics), 50% N of RDF + 50% N through FYM, 50 % N of RDF + 50% N through vermicompost and 50% N through FYM + 50% N through vermicompost were superimposed on each of the main plots as subplot treatments. The soil nutrients like N, P2O5, K2O, Zinc and Iron uptake and balance was highest in sole pea culture. Among the intercropping, the highest soil nutrient uptake was recorded in 3:3 row proportion of oat-pea intercropping. The data on total gain in nitrogen have revealed that the net soil N balance of 144.98 and 133.26 kg/ha was estimated for 3:2 oat-pea cropping during 2014-15 and 2015-16, respectively. A loss of P was calculated due to different cropping system in 2014-15, however during 2015-16 experiment, a positive gain of 1.65 P2O5 kg/ha was observed in 3:3 ratio of oat-pea intercropping. The net gain of available K2O was also calculated to be highest in an intercropping of oat-pea at the row proportions of 3:3 in both the years of experimentation. The calculated nutrient uptake by N, P2O5, K2O, Zn and Fe was significantly highest in 50 % N through vermicompost + 50 % N through inorganic fertilizer however nutrient balance of N, P2O5and K2Owas highest in 50% N through vermicompost +50 % N through FYM in all the years of experimentations. The highest calculated net gain of soil nutrients were also recorded from50 % N through vermicompost + 50 % N through inorganic fertilizer during 2014-15 and 2015-16 respectively.
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