Mehdi Ghiasy-Oskoee; Majid Aghaalikhani; Fatemeh Sefidkon; Ali Mokhtassi-Bidgoli; Mahdi Ayyari
Abstract
In order to study the effect of N rate and plant density on grain yield and N use efficiency of blessed thistle, a field study was carried out in a randomized complete block design with factorial arrangement of treatments in three replications at Research Field of Tarbiat Modares ...
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In order to study the effect of N rate and plant density on grain yield and N use efficiency of blessed thistle, a field study was carried out in a randomized complete block design with factorial arrangement of treatments in three replications at Research Field of Tarbiat Modares University in 2013 and 2014 growing seasons. Treatments comprised of four pure N rates (0, 50, 100 and 150 kg N ha-1) from urea source and five plant densities (5, 10, 15, 20 and 25 plants m-2). The main effects of nitrogen and plant density were significant for grain yield, NUE, plant height, SPAD value, root to shoot weight ratio and N content of grain. Increasing N rates increased grain yield, SPAD value, plant height and grain N, but agronomic efficiency, N recovery and utilization were decreased by increasing of N rate; Higher densities resulted in decreased grain yield and chlorophyll index, while improved NUE throughout increment of root to shoot weight ratio and plant height. Novel findings of this study could be used for N management.
Akbar Poorjafari; Abdol Ali Shojaian; Ebrahim Mohammadi Goltapeh; Mahdi Ayyari Noushabadi
Abstract
The white button mushroom is the world’s most widely grown culture mushroom species that can utilize various kinds of agro industrial lingo-cellulosic waste as a substrate. Selection of compost components in each region is essential factor for production of mushrooms. The objective of this study ...
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The white button mushroom is the world’s most widely grown culture mushroom species that can utilize various kinds of agro industrial lingo-cellulosic waste as a substrate. Selection of compost components in each region is essential factor for production of mushrooms. The objective of this study was to evaluate application of pistachio waste by utilizing as a substrate component for button mushroomproduction and their effects on the quality and quantity of produced mashrooms in 2013, at Tarbiat Modarres University. In this study one control (without waste), pistachio hull and shells mixed (ratio 50:50) (PH+SH), pistachio shelling waste (PSW) and pistachio hulls (PH) were applied in three levels consisting of 25, 50 and %75 combined with substrate control in completely randomized design with four replications (40 experimental units). The results of experiments indicates that the highest yield and biological efficiency percentage was obtained from 25 and %50 of PH+SH and PSW, that the mushrooms production on this experimental substrates were more prolific than of the control substrate. In this experiment, it was found that production of substrate with the PH in compared to the control, is not suitable to yield and biological efficiency percentage.This study demonstrated that Agaricus bisporus may successfully produce from compost containing pistachio waste.