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Researcher Sowjanya, Aleti
Advisor Sree, Rekha M.
Source KrishiKosh-Indian National Agricultural Research System
Content type Text
Educational Degree Master of Science (M.Sc.)
Publisher Acharya N.G. Ranga Agricultural University
File Format PDF
Language English
Subject Domain (in DDC) Technology ♦ Agriculture & related technologies ♦ Animal husbandry
Subject Keyword Nitrogen ♦ Inorganics ♦ Rice (oryza Sativa L.) ♦ Agronomy ♦ Nitrogen Management Through Combined Use of Organics and Inorganics In Transplanted Rice (oryza Sativa L.)
Abstract A field experiment entitled “Nitrogen management through combined use of organics and inorganics in transplanted rice (Oryza sativa L.)†was conducted on clay soil of the Agricultural College Farm, Bapatla during kharif, 2015-16. The experiment consisted of twelve treatments viz., 75 per cent recommended dose of nitrogen i.e. 90 kg ha-1 (T1); 100 per cent recommended dose of nitrogen i.e. 120 kg ha-1 (T2); 125 per cent recommended dose of nitrogen i.e. 150 kg ha-1 (T3); 50 per cent N of T1 through inorganic fertilizer + 50 per cent N of T1 through FYM (T4); 50 per cent N of T1 through inorganic fertilizer + 50 per cent N of T1 through poultry manure (T5); 50 per cent N of T1 through inorganic fertilizer + 50 per cent N of T1 through neemcake (T6); 50 per cent N of T2 through inorganic fertilizer + 50 per cent N of T2 through FYM (T7); 50 per cent N of T2 through inorganic fertilizer + 50 per cent N of T2 through poultry manure (T8); 50 per cent N of T2 through inorganic fertilizer + 50 per cent N of T2 through neemcake (T9); 50 per cent N of T3 through inorganic fertilizer + 50 per cent N of T3 through FYM (T10); 50 per cent N of T3 through inorganic fertilizer + 50 per cent N of T3 through poultry manure (T11) and 50 per cent N of T3 through inorganic fertilizer + 50 per cent N of T3 through neemcake (T12). The experiment was laid out in a Randomized block design and replicated thrice. The findings of the experiment revealed that initial and final plant population of rice was not significantly influenced by the combined use of organics and inorganics. Significantly higher growth parameters viz., plant height, number of tillers m-2 and drymatter production were recorded with application of 125 per cent RDN and 50 per cent N of T3 through inorganic fertilizer + 50 per cent N of T3 through poultry manure followed by 100 per cent RDN. However, these three treatments were on par among themselves and were significantly superior to rest of the treatments at all growth the stages viz., 30, 60, 90 DAT and at maturity. Yield components viz., productive tillers m-2, total number of grains panicle-1 and number of filled grains panicle-1 were significantly highest with 50 per cent N of T3 through inorganic fertilizer + 50 per cent N of T3 through poultry manure treatment, which was on par with 125 per cent RDN and 100 per cent RDN and proved significantly superior to remaining treatments. Test weight was not significantly influenced by different treatments. Application of 50 per cent N of T3 through inorganic fertilizer + 50 per cent N of T3 through poultry manure recorded significantly the highest grain and straw yields (5680 and 6997 kg ha-1, respectively) and was on par with treatments supplied with 125 per cent recommended dose of nitrogen and 100 per cent RDN. Harvest Index was not significantly influenced by the different nitrogen management treatments. There was no significant difference among the treatments tested, in respect of quality parameters of rice grain such as, milling per cent, hulling per cent, head rice recovery, L/B ratio and protein content. The maximum N uptake at panicle initiation and at harvest, P and K uptakes at harvest were recorded with T3 and T11 treatments which received 125 per cent RDN, 50 per cent N of T3 through inorganic fertilizer + 50 per cent N of T3 through poultry manure, respectively. Availability of nitrogen was significantly highest with 50 per cent N of T3 through inorganic fertilizer + 50 per cent N of T3 through FYM after harvest of the rice crop. The maximum phosphorous availability was recorded with 50 per cent N of T3 through inorganic fertilizer + 50 per cent N of T3 through poultry manure. Significantly higher soil available potassium was observed with the treatment received 50 per cent N of T3 through inorganic fertilizer + 50 per cent N of T3 through neemcake. Higher net returns and returns per rupee invested were obtained with 50 per cent N of T3 through inorganic fertilizer + 50 per cent N of T3 through poultry manure followed by the application of 125 per cent RDN and 100 per cent RDN. It can be concluded that among all the treatments tested, combined application of inorganic and organic sources (at 50 per cent each) were more effective in realizing higher grain yield of rice.
Educational Use Research
Education Level UG and PG
Learning Resource Type Thesis
Publisher Place Guntur
Size (in Bytes) 10.66 MB
Page Count 119