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Nutrient efficient genotypes in cassava: scope to substitute for chemical fertilizers and in C sequestration

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Title Nutrient efficient genotypes in cassava: scope to substitute for chemical fertilizers and in C sequestration
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Creator K. Susan John, S.U. Shanida Beegum, M.N. Sheela and G. Suja
 
Subject climate resilient, K efficient, NUE parameters, tuber yield, fine roots, low input management
 
Description Not Available
Though cassava is a climate resilient crop having innate physiologic ability to
sustain under rising atmospheric temperature, escalating fertilizer prices and its
marginal availability has resulted in imbalanced plant nutrition affecting tuber yield,
soil health as well as farmers' income. Hence, an attempt was made to see the
response of some selected nutrient efficient cultivars under different nutrient
management practices in substituting for chemical fertilizers as well as on growth and
yield attributes. The study over 5 years revealed a better scope for these genotypes in
sustaining the productivity in low innate fertile soils like Ultisols. Screening 100 elite
genotypes for their agronomic and physiological efficiency resulted in the selection of
six K efficient lines, 3 each for edible and industrial uses. Evaluation of these
genotypes at 4 levels (0, 50, 100, and 150 kg ha-1) of K for 3 consecutive years and
computation of NUE parameters and physiologic parameters other than tuber yield,
tuber quality, drought and mosaic tolerance and plant architecture resulted in
identifying Aniyoor (edible) and 7 III E3-5 (industrial) as K efficient. These genotypes
could perform better at K50 and K0 at which the root biomass and LAI supported
their efficacy to scavenge the fixed native soil K and its better utilization. Screening
300 land races resulted in the identification of fifteen NUE lines. Experiments with
three NPK efficient lines viz., Acc. No. 906, Acc. No. 766 and Acc. No. 905 indicated
higher potential of Ac. No. 906 in low input management (soil test based) and in
higher C sequestration.
Not Available
 
Date 2021-08-04T06:24:42Z
2021-08-04T06:24:42Z
2016-05-01
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/52864
 
Language English
 
Relation Not Available;
 
Publisher International Society of Horticultural Sciences