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Thulasi, V.
- Rice Growth and Yield Under Twenty Years of Cropping in a Long Term Fertilizer Experiment in Central Laterites of Kerala
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Authors
Affiliations
1 Regional Agricultural Research Station, Pattambi (Kerala), IN
2 Indian Institute of Soil Science, Bhopal (M.P.), IN
1 Regional Agricultural Research Station, Pattambi (Kerala), IN
2 Indian Institute of Soil Science, Bhopal (M.P.), IN
Source
An Asian Journal of Soil Science, Vol 15, No 1 (2020), Pagination: 41-45Abstract
The AICRP on long term fertilizer experiment was established at RARS Pattambi in 1997 and the experiment is being conducted continuously in the same field. The objective of the experiment was to study the effect of long term application of fertilizers and manures on growth and yield of the plant and monitoring of soil quality. The experiment consists of 12 treatments. The LTFE experiment with 20 years cropping history revealed the superiority of integrated nutrient management with 100 per cent NPK along with FYM over the sole use of fertilizers. However in situ growing of dhaincha (Sesbania aculeata) also offer a good solution for integration of manures and fertilizers. Integrated nutrient management and in situ green manuring with daincha recorded higher grain and straw yield and the growth parameters corroborated the trends in yield.Keywords
LTFE, Laterite Soil, INM, Long Term Fertilizer Experiments.
References
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- Impact of Elevation of Atmospheric CO2 on Yield and Biomass Partitioning in Rice and Wheat
Abstract Views :514 |
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Authors
Affiliations
1 Regional Agricultural, Research Station, Pattambi (Kerala), IN
2 Indian Agricultural Research Institute, New Delhi, IN
1 Regional Agricultural, Research Station, Pattambi (Kerala), IN
2 Indian Agricultural Research Institute, New Delhi, IN
Source
An Asian Journal of Soil Science, Vol 15, No 1 (2020), Pagination: 59-64Abstract
To study the impacts of elevation of CO2 on rice-wheat system, a pot culture experiment and a field experiment were undertaken. The pot culture experiment was conducted in open top chambers (OTCs) with surface soils collected from a typic haplustept (IARI, New Delhi). Rice and wheat were grown as test crops at ambient (approx. 370 mol mol-1) and elevated (600±50 mol mol-1) levels of atmospheric CO2. Total biomass yield was increased by 32.26 and 33.83 per cent as a result of elevation of CO2 concentration in the micro climate of rice and wheat, respectively. Various plant parts differed with respect to their relative gain in yield and the relative gains in biomass of different plant parts on exposure to elevated CO2 were in the order of: Rice: Grain (48.11) > Leaves (43.97) > ischolar_mains (34.95) > stem (18.80) and Wheat: Root (70.54) > Leaves (42.50) > grain (35.39) > stem (21.00). At all stages of crop growth, exposure to higher CO2 in atmosphere increased the preferential partitioning of carbon to ischolar_mains both in rice and wheat.Keywords
OTC, FACE, Elevated CO2, Rice-Wheat.References
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