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Optimum Nutrient Requirement of Elephant Foot Yam (Amorphophallus paeoniifolius (Dennst.) Nicolson) Under Coconut Gardens

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Title Optimum Nutrient Requirement of Elephant Foot Yam (Amorphophallus paeoniifolius (Dennst.) Nicolson) Under Coconut Gardens
Not Available
 
Creator P. S. Anju1, K. Susan John1, S. Bhadraray2, Jeena Mathew3, S. Sunitha1 and S. S. Veena1
 
Subject Elephant foot yam, customized fertilizer formulations, nutrient omission experiment, nutrient level experiment, sub optimal level, super optimal level, corm yield
 
Description Not Available
Among the tropical tuber crops, elephant foot yam (EFY) (Amorphophallus paeoniifolius (Dennst.)
Nicolson) is a highly potential and ideal intercrop for the coconut gardens of Kerala. Being highly
efficient biologically with good yield potential to the tune of 30-100 t ha-1, it is high nutrient demanding
too. Though, there are different nutrient management approaches for the cultivation of this crop,
taking into account both crop productivity as well as soil health, balanced nutrition based on soil
nutrient status and crop requirement deserves special mention. In this regard, customization of nutrients
specific to regions and crops can be considered as one of the key approaches. In the protocol for
arriving at the grades of the customized fertilizer formulations, one component is evolving the actual
optimum of all nutrients of a particular soil by conducting nutrient omission experiments for major
nutrients and nutrient level experiments for secondary and micronutrients. Such experiments were
conducted for elephant foot yam under intercropping in coconut gardens of the major tuber crops
growing soils of Kerala viz., laterite (AEU 9) and sandy plains (AEU 3). The theoretical optimum (based
on weighted average data of the soil test) was N : P : K : Mg : Zn : B : Dolomite @ 71 : 12.5 : 106.5
: 16 : 5.25 : 1.31 : 1000 (AEU 3) and 78 : 12.5 : 90 : 16 : 5.25 : 1.31 : 1000 kg ha-1 (AEU 9)
respectively. The weighted average data of nutrients was 0.95 and 1.50% (organic carbon), 61.97
and 69.27 kg ha-1 (available P), 213.96 and 295.87 kg ha-1 (available K), 113.32 and 600.16 ppm
(exchangeable Ca), 37.53 and 114.99 (exchangeable Mg), 5.07 and 21.46 ppm (available S), 3.94
and 5.68 ppm (available Zn), 0.70 and 0.82 ppm (available B), 1.79 and 3.79 ppm (available Cu),
101.20 and 64.66 ppm (available Fe) and 18.82 and 37.65 ppm (available Mn) respectively for AEU
3 and AEU 9. Different sub optimal and super optimal levels of the theoretical optimum of nutrients
viz., N,P, K, Mg, Zn, B and Dolomite was kept as treatments for conducting these experiments in the
two locations of AEU 9 and one location in AEU 3. Based on the corm yield data from these experiments,
the actual optimum derived by conducting the NOP (Nutrient Omission Plot) and NLE (Nutrient Level
Experiment) was N: P: K: Mg: Zn: B: Dolomite @ 140: 20: 225: 19.2: 4.2: 1.575: 1500 kg ha-1 for
AEU 3 and 160:12.5:180: 19.2:6.3:1.975:1500 kg ha-1 for AEU 9 respectively and these experiments
formed the basis for calculating the different nutrient use parameters for arriving at the grades of the
customized fertilizer formulations.
Not Available
 
Date 2021-08-06T04:03:09Z
2021-08-06T04:03:09Z
2020-06-01
 
Type Article
 
Identifier Not Available
0378-2409
http://krishi.icar.gov.in/jspui/handle/123456789/53325
 
Language English
 
Relation Not Available;
 
Publisher Indian Society for Root Crops