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

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Title Optimum Nutrient Requirements of Elephant Foot Yam (Amorphophallus paeoniifolius (Dennst.) Nicolson) Under Coconut Gardens
Not Available
 
Creator Anju, P.S., Susan John, K., Bhadraray, S. Jeena Mathew, Sunitha, S. and Veena, S.S
 
Subject Amorphophallus paeoniifolius, agro-ecological units, tuber yield, nutrient requirement, fertilizer use efficiency, customized fertilizer, soil test crop response, response curve, BC ratio, soil quality
 
Description Not Available
Among tropical tuber crops, elephant foot yam (Amorphophallus paeoniifolius (Dennst.) Nicolson) is a
highly potential and ideal intercrop in the coconut gardens of Kerala, especially in agro-ecological unit
(AEU) 3 and AEU 9 with laterite and sandy soil types, respectively. This paper narrates the protocols
developed for evolving customized fertilizer (CF) formulations for elephant foot yam (EFY) under
intercropping in coconut gardens of Kerala including their testing and validation in different parts of the
State to arrive at the best grade and rate of application. The methodology included, arriving at the weighted
average data of each chemical parameter of the two AEUs and the theoretical optimum of the nutrient
recommendation evolved for N, P, K, Mg, Zn, B, dolomite based on the weighted average data was 71:
12.5: 106.5: 12.8: 4.2: 1.31: 1000 kg ha-1 for AEU 3 and 78: 12.5: 90: 12.8: 4.2: 1.31: 1000 kg ha-1 for AEU
9, respectively. The actual optimum nutrient doses evolved based on nutrient omission plot (NOP) and
nutrient level (NL) experiments for N, P, K, Mg, Zn, B and dolomite was 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. Based
on the nutrient use parameters computed for an yield target of 45 t ha-1, as per soil test crop response
(STCR), quantity of nutrients to be supplied through CF formulation was arrived as 203 and 185, 58 and
63, 145 and 175 kg N, P2O5 and K2O, respectively for AEU 3 and AEU 9. In the case of secondary and
micronutrients, the level at which the highest tuber yield obtained as 19.2, 4.2 and 1.575 kg ha-1 Mg, Zn, B,
respectively for AEU 3 and 19.2, 6.3 and 1.975 kg ha-1 for AEU 9 was taken. Considering the nutrient
content in the CF as 20% N and 70% K, for an application rate of 500 kg ha-1, the grades of the CF based
on STCR approach was arrived as N: P2O5: K2O: Mg: Zn: B is 8: 11: 21: 3.5: 1: 0.3 for AEU 3 (CF1) and 7:
12: 24: 3.5: 1.25: 0.4 for AEU 9 (CF2). In the response curve (RC), the nutrient levels at the highest tuber
yield obtained under NOP and NL was taken and the grades of N: P2O5: K2O: Mg: Zn: B arrived was 7: 3:
25: 4: 1.25: 0.4 for AEU 9 (CF3) and 6: 3: 30: 3.5: 1: 0.3 for AEU 3 (CF4). Among these four grades, the
first three grades tested at two doses viz. 500 and 625 kg ha-1 in three farmers’ fields of the two AEUs
indicated better performance of all the three grades @ 625 kg ha-1. The three grades @ 625 kg ha-1 tried in
large plots of the five major EFY growing districts of Kerala viz. Thiruvananthapuram, Kollam,
Pathanamthitta, Kottayam and Ernakulam for profitability, soil health and tuber quality revealed CF2 with
grade as N: P2O5: K2O: Mg: Zn: B @ 7: 12: 24: 3.5: 1.25: 0.4 as the best in terms of tuber yield, BC ratio,
soil quality indices and biochemical attributes of the tuber.
Not Available
 
Date 2021-08-04T05:57:58Z
2021-08-04T05:57:58Z
2021-06-01
 
Type Article
 
Identifier Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/52831
 
Language English
 
Relation Not Available;
 
Publisher Indian Society of Soil Science