Browsing by Author "SAPNA, KUMARI"
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ThesisItem Open Access PERFORMANCE EVALUATION OF NANO UREA BASED NITROGEN MANAGEMENT FOR MAXIMIZING WHEAT PRODUCTIVITY UNDER RESTRICTED IRRIGATION(Dr.RPCAU, Pusa, 2022) KUMARI, QUARI; SAPNA, KUMARIAt the RPCAU Pusa farm, Samastipur (Bihar), an experiment was done in the year 2021-2022, with the goal of evaluating the "Performance evaluation of nano urea based nitrogen management for maximizing wheat productivity under restricted irrigation." The major goal of this work was to create a technology for employing nano urea under these circumstances to increase wheat productivity. The experiment was designed using an RBD with three replications and eleven treatments. The test farm's soil was a sandy loam with 0.47% organic carbon and a pH of 8.28. The soil contains 110 kg ha-l of K2O, 17.18 kg ha-l of P2O5, and 221 kg ha-l of readily available N. The growth and yield traits are significantly impacted by various treatments. Two nano urea sprays at tillering and jointing under RDN+ resulted in increased plant height and more tillers. The results of the study demonstrated that higher dry matter production and crop growth rate were seen under RDN+ with two sprays of nano urea at tillering and jointing. Under the RDN+ two sprays of nano urea at tillering and jointing, plant height, the density of tillers per square metre, and the accumulation of dry matter all increased. Higher numbers of ear head/ m2, length of ear head, test weight and number of grains/ ear head were seen from RDN+one spray of nano urea at tillering. The highest harvest index (HI) was reported from RDN+ two sprays of nano urea at tillering and jointing, but higher grain yield and straw were recorded from RDN+ one spray of nano urea at tillering. Higher gross returns, net returns, and B: C ratios were achieved in RDN+one spray of nano urea during tillering.ThesisItem Open Access STUDIES ON IN VITRO PROPAGATION OF BLUEBERRY(VACCINIUM CORYMBOSUM L.) - A MEDICINALLY IMPORTANT FRUIT SPECIES(2013) SAPNA, KUMARI; KAUR, RAJINDERABSTRACT A protocol for in vitro propagation was developed for Vaccinium corymbosum, a medicinally important fruit species. The sterilized explants (buds) cultured on MS and WPM supplemented with 5.0 mg/l 2-iP + 1.0 mg/l GA3 and 2.5 mg/l zeatin + 1.0 mg/l GA3, respectively gave best results for in vitro shoot bud establishment. Out of the two media found best for bud establishment, WPM supplemented with 2.5 mg/l zeatin + 1.0 mg/l GA3 proved to be the best for in vitro shoot multiplication. Also comparison of different growth regulators viz., zeatin, 2-iP and BAP in both MS as well as WPM was studied and out of these three different growth regulators, zeatin was found to be best for in vitro shoot multiplication. Leaves were found to be the best explants for callus induction from both in vivo and in vitro explants on both MS as well as WPM supplemented with 0.25 mg/l TDZ + 0.05 mg/l IBA in each case. The callus obtained with both in vivo and in vitro leaf explants was compact nodular soft in texture and green in color. For shoot regeneration from callus, it was found that in vivo shoot segments derived callus when cultured on WPM medium supplemented with 2.0 mg/l zeatin showed best results. Root primordium formation was observed on basal WPM supplemented with different concentrations of IBA viz., 1.0 mg/l and 2.0 mg/l and also with 0.2 % activated charcoal. Ex vitro rooting was carried out and 80.00% of survival rate was obtained on rooting mixture containing cocopeat : perlite (1:1).