EFFECT OF SOURCES, METHODS AND TIME OF APPLICATION OF ZINC ON PRODUCTIVITY, ZINC UPTAKE AND USE EFFICIENCY OF OATS (AVENA SATIVA L.) UNDER ZINC DEFFICIENT CONDITION

摘要

A field experiment conducted at the Indian Agricultural Research Institute, New Delhi, India showed that oats (Avena sativa L.) responded (grain yield increase) to zinc (Zn) fertilizer and coating of oat seeds with Zn sulfate or Zn oxide is the best practice. Zinc fertilizer applied to soil, deep placement (5cm below the seed placement) was superior for growth and yield than soil surface (broadcast) application. Delaying Zn application to 25days after sowing (first irrigation) was inferior to Zn application at sowing. Partial factor productivity (PFP) of applied Zn varied from 700-2,024kg grain kg Zn-1, agronomic efficiency (AE) varied from 62-428kg grain increase kg(-1) Zn (applied) and physiological efficiency (PE) of Zn varied from 1,822-3,221kg grain kg(-1) Zn (absorbed). The crop recovery efficiency (CRE) varied from 3.1-17.7%. Thus, adequate Zn fertilizer of oats can lead to higher grain yield and higher Zn concentration in grain (improved quality for human nutrition) under Zn deficient soil.