Document Type : Original Article

Authors

1 Department of Agronomy and Plant Breeding, University of Mohaghegh Ardabili, Ardabil, Iran

2 Scientific member of Horticulture Crops Research Department, Ardabil Agricultural and Natural Resources Research Centre, AREEO, Ardabil, Iran

Abstract

Water limitation is one of the most important abiotic factors that can limit plant growth and yield particularly in arid and semiarid regions. In order to study the effects of supplementary irrigation and nano iron oxide on chlorophyll content and grain filling components of wheat (Triticum aestivum L.) under rainfed, a factorial experiment was conducted based on randomized complete block design with three replications in Agricultural Research Station of Ardabil in 2016. Factors were included three levels of irrigation (no irrigation as rain fed, supplementary irrigation at heading and booting stages) and foliar application of nano iron oxide in four levels (without nano iron oxide as control, application of 0.3, 0.6 and 0.9 g L-1). Results showed that supplementary irrigation at booting stage and 0.9 g L-1 nano iron oxide increased grain yield, chlorophyll a, b, total chlorophyll and carotenoeids (16.79, 57.78, 64.32 and 115.21 % respectively) in comparison with rain fed and no application of nano iron oxide. Application of 0.9 g L-1 nano iron oxide and supplementary irrigation at booting stage increased grain filling rate, grain weight, grain filling period, effective grain filling period and grain yield (12.5, 47.36, 16.95, 29.18 and 38.43% respectively) in comparison with no application of nano iron oxide under rainfed condition. Generally, it seems that application of nano iron oxide and supplementary irrigation can be as a proper tool for increasing grain yield and grain filling period under rain fed condition

Keywords

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