Effect of Long Term Application of Fertilizers and Manure on Nitrogen Fractions in a Vertisol
| dc.contributor.advisor | Sawarkar, S.D. | |
| dc.contributor.author | Kushwaha, Satyabhan | |
| dc.date.accessioned | 2016-08-29T11:49:17Z | |
| dc.date.available | 2016-08-29T11:49:17Z | |
| dc.date.issued | 2013 | |
| dc.description.abstract | ABSTRACT A field experiment was conducted during the year 2011-12 under All India Coordinated Research Project on Long Term Fertilizer Experiment at the Department of Soil Science and Agriculture Chemistry, College of Agriculture JNKVV, Jabalpur to study the “Effect of long term continuous application of fertilizers and manure on nitrogen fractions in a Vertisol” under soybean-wheat cropping scheme. The field experiment being conducted under AICRP on LTFE with 10 treatments only 8 were for this study Viz. 50%, 100%, 150% NPK, 100% NP, 100% N, 100% NPK+FYM, 100% NPK-S and Control, replicated four times in a randomized block design. The recommended dose (100%) of NPK for soybean and wheat is 20:80:20 and 120:80:40 kg ha-1 N, P2O5 and K2O, respectively. These nutrient were applied through urea, super phosphate (DAP for sulphur free treatment) and muriate of potash were applied to provide N, P and K respectively. Organic manure as FYM applied @ 15 t ha-1 only to soybean crop (kharif season). The finding of the experiment revealed that the physicochemical properties like soil pH and EC have not changed substantially even after repeated application of fertilizers for the last 39 years breaking the myth that fertilizers have adverse effect on soil health. The fertility of the soil appears to have been adversely affected due to the use of imbalanced fertilizers (elimination of either PK or K or S). However, the use of balanced fertilizers either alone or integrated with organic manure (FYM) have helped in improving the organic carbon content of the soil, which is an indicator of soil health improvement. The successive addition of N fertilizer increased the available N status and N fractions from its initial status and highest deposition (1912.96 Kg ha-1) in the treatment receiving 100% NPK+FYM followed by 150% NPK (1818.88 kg ha-1). While the lowest status was recorded where fertilizer was not added 1398.07 (kg N ha-1) at the 0-15 cm. Soil depth all the fractions decreased with increasing soil depth. The results on relationship between inorganic forms of N and availability of N showed that N application increased available N in the soil. Further, N fractions were significantly correlated with productivity of soybean and amongst the various forms of N, available-N, inorganic-N,total hydrolysable-N, hydrolysable ammonical-N, hexose amine and hydrolysable ammonical-N, hexose amine-N, amino acid N, unidentified hydrolysable-N and non-hydrolysable-N was positively and significantly correlated with organic carbon. The highest crop productivity of (soybean) was recorded with balanced NPK applied with FYM. Various forms of nitrogen fractions, total hydrolysable-N is the present on mineralizable forms as compared to other form. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/74281 | |
| dc.language.iso | en | en_US |
| dc.publisher | JNKVV | en_US |
| dc.sub | Soil Science and Agricultural Chemistry | |
| dc.these.type | M.Sc | |
| dc.title | Effect of Long Term Application of Fertilizers and Manure on Nitrogen Fractions in a Vertisol | en_US |
| dc.type | Thesis | en_US |