Agriculture
Hamidreza sharifi; zohreh nabipour; mohammad joleini
Abstract
In order to investigate the effect of different methods and levels of irrigation water on some vegetative and reproductive characteristics of saffron, this research was carried out in the form of a split-plot experiment in the form of a randomized complete block design with three replications at the ...
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In order to investigate the effect of different methods and levels of irrigation water on some vegetative and reproductive characteristics of saffron, this research was carried out in the form of a split-plot experiment in the form of a randomized complete block design with three replications at the Razavi Khorasan Agricultural and Natural Resources Research and Training Center. (Gonabad Research Station) was carried out in the crop years of 2017-2018. In this research, irrigation method treatments (including basin, drip and sprinkler (Pflex) methods) were in the main plot and different levels of irrigation water (including supplying 100, 75 and 50% of the water requirement) were in the sub plot. Results The comparison of the averages showed that in both years of the experiment, changing the irrigation method from basin to drip (tape) and sprinkler (P-flex) led to an increase in the studied properties. Reducing the amount of irrigation water from 100% to 50% of the water requirement also caused a decrease in leaf characteristics and stigma yield, but the efficiency of irrigation water consumption increased. Based on this, reducing the water requirement of saffron from 100 to 50% in the first and second year caused a 33% and 30% decrease in stigma yield, and a 32% and 37% increase in water consumption efficiency, respectively. Examining the interaction effects table showed that in the first year of the experiment, reducing the amount of irrigation from 100 to 50% caused a greater reduction in the total length of leaves per square meter under drip irrigation (tape) than the other two irrigation methods (82% in the drip method (tape) in contrast to 79% in the sprinkler (P-flex) method and 69% in the basin method). Based on this, although the positive effect and relative advantage of modern irrigation systems is decreasing with the increase in the age of the farm, it seems that it is possible to achieve optimal performance in the region by using rain irrigation sprinkler (P-flex) method in 100% of the water requirement.
Agriculture
Nasim Rezvani; Majid Pouryousef; Afshin Tavakoli
Abstract
Saffron, a cherished native plant of Iran, holds immense value, and its optimal growth and development hinge on the precise administration of nutrients and growth regulators. However, scant information exists concerning the nutritional attributes and the impacts of external application of growth regulators ...
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Saffron, a cherished native plant of Iran, holds immense value, and its optimal growth and development hinge on the precise administration of nutrients and growth regulators. However, scant information exists concerning the nutritional attributes and the impacts of external application of growth regulators on its overall performance. This study intends to scrutinize the influence of varying concentrations of forchlorfenuron and potassium nitrate on the attributes of daughter corms as well as the ultimate saffron yield. Through this investigation, a deeper understanding of the relationship between growth regulators, nutrients, and saffron production can be attained, shedding light on the potential avenues for enhancing its cultivation and yield. This experiment was conducted as a factorial based on a randomized complete block design in the research farm of Zanjan University. According to the results, the interaction effect of forchlorfenoren 2.5 and 5 mg.liter-1 and potassium nitrate 500 mg.liter-1 decreased the number of daughter corms. Characteristics such as the weight of daughter corms of more than 7 grams per square meter, corm diameter, number of flowers per square meter, and the amount of safranal, crocin, and picrocrocin showed a significant increase due to the interaction of forchlorfenoren 5 mg.liter-1 and potassium nitrate 1000 mg.liter-1. The highest wet and dry weight of the stigma was 11.49 and 1.15 grams per square meter, respectively, with the treatment of furchlorfenoren at the level of 5 mg.liter-1. Also, the use of potassium nitrate at the level of 1000 mg.liter-1 increased the fresh and dry weight of the stigma by 10.22 and 1.01 grams per square meter, respectively. The maximum stigma length was obtained in treating furchlorfenoren 10 mg.liter-1 and potassium nitrate 250 mg.liter-1. Based on the outcomes derived from foliar application experiments, it is advisable to consider utilizing a concentration of 5 mg.liter-1 for forchlorfenuron and 1000 mg.liter-1 for potassium nitrate during the period extending from March to April. This recommendation holds under the premise that environmental conditions are conducive, encompassing factors such as favorable temperatures for foliar spraying. This practice is particularly relevant to the climatic conditions prevalent in the Zanjan region.
