Effects of Biological Fertilizer Spray and Planting Date on Yield and Yield Components of cowpea Vigna unguiculata In Bastam Shahrood
Subject Areas : Journal of Plant Ecophysiology
A. Nahardani
1
(گروه کشاورزی، واحد دامغان، دانشگاه آزاد اسلامی، دامغان، ایران.)
جعفر Masoud Sinaki
2
(گروه کشاورزی، واحد دامغان، دانشگاه آزاد اسلامی، دامغان، ایران.)
H. Abaspour
3
(گروه کشاورزی، واحد دامغان، دانشگاه آزاد اسلامی، دامغان، ایران.)
saeid gharib bolouk
4
(Damghan Branch, Islamic Azad University)
Keywords: Agronomic Traits, Vigna unguiculata, Multi _ Micronutrient EDTA chelate, Number of pods per plant,
Abstract :
A field experiment laid out in the factorial spli-plot arrangement using the randomized complete block design with three replications was conducted to study the effects of date of planting, time of spraying fertilizer (multi-micronutrient EDT chelate), and cultivars on yield and yield components of cowpea. The treatments included three levels of planting date (6 May, 16 May, and 26 May) as the major factor , three fertilizer spray levels (60, 70, and 80 days after planting) and two cultivars ( Bastami and Ghadim) as the minor factors. Results of the table of ANOVA indicated the traits of number of pods per plant and seed yield were influenced by the treatments of planting date, cultivar, and sprays at the 1% probability level. The Bastami cultivar yielded more pods per plant and higher seed yield compared to the Ghadim cultivar. Fertilizer spray on the 80th day after planting had the maximum effect on seed yield (3.17 t / ha). Under the individual effect of planting date, the largest number of pods per plant and the maximum 1000-seed weight were observed in the treatment of planting on 6 May. The mutual effects of planting date and fertilizer spray on the number of pods per plant were significant at the 1% probability level, and the combination treatment of 6 May planting date fertilizer spray on the 80th day after planting had the largest number of pods per plant.
