Effect of time and amount of seaweed extract on yield and yield components of cotton in saline conditions

Subject Areas :

mohamad  ardakani ¹ (دانش آموخته کارشناسی ارشد زراعت، گروه زراعت و اصلاح نباتات، واحد سبزوار، دانشگاه آزاد اسلامی ، سبزوار، ایران)
mohamad  armin ² (دانشیار، گروه زراعت و اصلاح نباتات، واحد سبزوار، دانشگاه آزاد اسلامی، سبزوار، ایران)
abolghasem  dadrasi sabzevar ³ (استادیار، مرکز تحقیقات کشاورزی و منابع طبیعی سبزوار، سبزوار، ایران)

Received: 2019-08-29 Accepted : 2020-01-23 Published : 2020-02-29

Keywords: Salinity, Foliar application, Cotton, Seaweed extract,

Abstract :

 In order to investigate the effect of foliar application of seaweed extract on yield and yieldcomponents of Cotton under salinity stress, a factorial experiment in a randomizedcomplete block design with three replications was conducted in Sabzevar Agricultural andNatural Resources Research Center in 2017. The experimental factors included applicationrate of seaweed extract at four levels of 0, 2, 4, and 6 ‰ and foliar application time at twolevels at the vegetative and vegetative+flowering stage. The results showed that the timeof seaweed extract application had no effect on the number of sympodial branches, thenumber of bolls, boll weight and grain yield, while foliar application of seaweed extract atvegetative + flowering increased the final height, lint percent, cotton seed yield and fiberyield. Foliar application at a concentration of 6 ‰ of seaweed extracts increased 31.19%in height, 32.19% in sympodial branches, 41.44 in boll, 23.25% in boll weight, 41.43%seed cotton yield, 61.43%, seed yield, 29.66%, fiber yield and 42.34% lint percent, Ingeneral, the results of this experiment showed that two times foliar application of seaweedextract at level 6 per thousand in vegetative and flowering stages were recommended forproducing maximum yield and yield components of cotton under salt stress conditions.