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- Title
EFFICACY OF MINERAL NITROGEN AND ORGANIC MANURES ON GROWTH, DRY MATTER PRODUCTION AND NUTRIENT UPTAKE IN LOWLAND RICE.
- Authors
R., Manivannan; M. V., Sriramachandrasekharan; Senthilvalavan, P.
- Abstract
Field experiments were undertaken to study the effect of mineral nitrogen and organic manures on growth, dry matter production and nutrient uptake in rice during kharif 2007 and 2008 in sandy clay loam soil(Typic Ustifluvents) tested on N equivalence. There were fourteen treatments replicated thrice. The design was randomized block design with test crop rice var. ADT 43. The treatments consisted of different organics viz., composted coir pith(CCP), green manures(GM), sugarcane trash compost (STC), vermicompost (VC), poultry manure (PM) and FYM applied at 100% RDN and combination of above organics @ 50% N and urea @50% N besides 100% RDN as urea and control. The results revealed that addition of organics or mineral N or both significantly improved growth, dry matter production and nutrient uptake over control. The highest growth parameters, dry matter production and nutrient uptake were recorded in combination of organics and mineral nitrogen than their individual application. Application of 50% N through organics and 50% N through mineral N recorded highest growth parameters viz., plant height (94.5, 98.6 cm), no. tillers/hill (13.6, 14.1) and LAI (4.70, 4.78), DMP (4.12, 4.25 t ha-1) and (6.59, 6.62 t ha-1) at tillering and panicle initiation during 2007 and 2008 respectively. Among the organics alone, application of vermicompost (100%N) recorded the highest growth parameters viz., plant height (88.7, 82.8cm), no. tillers/hill (10.5, 11.5) and LAI (3.92, 4.25), DMP (4.12, 4.25 t ha-1) and (6.59, 6.62 t ha-1) at tillering and panicle initiation during 2007 and 2008 respectively. The highest nutrient uptake (N, P, K) were registered in 50% N through vermicompost and 50% N through mineral N. With respect to organics alone, the highest N, P, K uptake were recorded in 100% N through vermicompost in both seasons.
- Subjects
NITROGEN; MANURES; NUTRIENT uptake; LOAM soils; GREEN manure crops
- Publication
Plant Archives (09725210), 2020, Vol 20, Issue 2, p3169
- ISSN
0972-5210
- Publication type
Article