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Productivity of sodic soils can be enhanced through the use of salttolerant rice varieties and proper agronomic practicesY

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Title Productivity of sodic soils can be enhanced through the use of salttolerant rice varieties and proper agronomic practicesY
Not Available
 
Creator Y.P. Singha, V.K. Mishra, Sudhanshu Singh, D.K. Sharma, D. Singh, U.S. Singh,R.K. Singh, S.M. Haefele, A.M. Ismail
 
Subject Crop management, Cost effective options, Nutrient management, Salt affected soils, Salt tolerant rice
 
Description Not Available
tRegaining the agricultural potential of sodic soils in the Indo-Gangetic plains necessitates the develop-ment of suitable salt tolerant rice varieties to provide an entry for other affordable agronomic and soilmanipulation measures. Thus selection of high yielding rice varieties across a range of sodic soils is cen-tral. Evaluation of breeding lines through on-station and on-farm farmers’ participatory varietal selection(FPVS) resulted in the identification of a short duration (110–115 days), high yielding and disease resistantsalt-tolerant rice genotype ‘CSR-89IR-8’, which was later released as ‘CSR43’ in 2011. Several agronomictraits coupled with good grain quality and market value contributed to commercialization and quickadoption of this variety in the sodic areas of the Indo-Gangetic plains of eastern India. Management prac-tices required for rice production in salt affected soils are evidently different from those in normal soils andpractices for a short duration salt tolerant variety differ from those for medium to long duration varieties.Experiments were conducted at the Indian Council of Agricultural Research-Central Soil Salinity ResearchInstitute (ICAR-CSSRI), Regional Research Station, Lucknow, Uttar Pradesh, India during 2011 and 2013wet seasons, to test the hypothesis that combining matching management practices (Mmp) with animproved genotype would enhance productivity and profitability of rice in sodic soils. Mmp were devel-oped on-station by optimizing existing best management practices (Bmp) recommended for the region tomatch the requirements of CSR43. The results revealed that transplanting 4 seedlings hill−1at a spacing of15 × 20 cm produced significantly higher yield over other treatments. The highest additional net gain wasUS$ 3.3 at 90 kg ha−1N, and the lowest was US$ 0.4 at 150 kg ha−1N. Above 150 kg ha−1, the additional netgain became negative, indicating decreasing returns from additional N. Hence, 150 kg N ha−1was con-sidered the economic optimum N application rate for CSR43 in these sodic soils. Using 150–60–40–25 kgN–P2O5–K2O–ZnSO4·7H2O ha−1in farmers’ fields grown to CSR43 produced an average of 5.5 t ha−1grain. The results of on-farm evaluation trials of CSR43 showed that matching management prac-tices (Mmp) increased yield by 8% over existing best management practices (Bmp) recommendedby ICAR-CSSRI for sodic soils and by 16% over framers’ management practices; however, combin-ing Mmp with CSR43 resulted in 35% higher yields over farmers’ current varieties and management.This approach of combining cost effective crop and nutrient management options and a salt-tolerant variety can maximize the productivity and profitability of sodic soils in the alluvialIndo-Gangetic plains and in neighboring salt-affected areas of the Ganges mega delta in South Asia.
IRRI
 
Date 2018-09-22T10:53:59Z
2018-09-22T10:53:59Z
2016
 
Type Article
 
Identifier Singh et al.,2016.Productivity of sodic soils can be enhanced through the use of salt tolerant rice varieties and proper agronomic practices.Field Crops Research,190:82-90
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/7169
 
Language English
 
Relation Not Available;
 
Publisher ELSEVIER