Sevda Ghasemi Germi; morteza Barmaki; salim farzaneh; Mandana Amiri
Abstract
AbstractThis study aims at investigating the morpho-physiological responses of potato superelite mini-tubers to different coating treatments factorial experiment, based on randomized complete block design with three replications in Research Farm of Mohaghegh Ardabili University between 2018 and 2019. ...
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AbstractThis study aims at investigating the morpho-physiological responses of potato superelite mini-tubers to different coating treatments factorial experiment, based on randomized complete block design with three replications in Research Farm of Mohaghegh Ardabili University between 2018 and 2019. Experimental factors at four levels include mini-tubers filler (zeolite and cocopeat), superphosphate (soil and pellet application), chitosan, and superabsorbent with control treatment (without pelleting). Application of cocopeat with superphosphate leads to the highest average number of tubers per plant (8.36), fresh and dry tuber yield (18.23 and 3.88 tons per hectare), and biological yield (21.69 tons per hectare). The use of chitosan in mini-tuber pelleting decrease the activity of catalase and peroxidase enzymes (19.67% and 16.37%, respectively), increasing the activity of polyphenol oxidase (37.80%). Zeolite increase and cocopeat decrease the tuber protein percentage, compared to the control. This increase in protein percentage with increasing tuber yield leads to a 32.23% increase in tuber protein yield in zeolite application, compared to control treatment. The use of superphosphate in mini-tuber pelleting also increase the protein percentage, thus leading to a 30.30% increase in protein yield, compared to control mini-tuber. In principal component analysis (PCA), the first component, with which 35% of the changes could be explained, include the yield of protein, lysine, and methionine, and the second component, with which 25% of the changes could be explained, include the protein, methionine, lysine, and total nitrogen. Finally, the results show that the mini-tuber pelleting by superphosphate, zeolite, and superabsorbent have had significant additive effects on yield and quality traits.
Roghie Bamshad; Mahmoud Ramroudi; Mohammad Asgharipour
Abstract
In order to investigate the effects Azoto of irrigation cutting and chemical and biological fertilizers, Azoto Barvar 1 and phosphate Barvar 2 on grain yield, essential oil and biochemical properties cumin, an experiment was conducted as split plot based on a randomized complete block design with three ...
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In order to investigate the effects Azoto of irrigation cutting and chemical and biological fertilizers, Azoto Barvar 1 and phosphate Barvar 2 on grain yield, essential oil and biochemical properties cumin, an experiment was conducted as split plot based on a randomized complete block design with three replications at the University of Zabol Research Farm during 2016. Main plots included four levels of irrigation cutting; conventional irrigation, irrigation cutting in between stem elongation to flowering, irrigation cutting in between flowering to beginning of the grain filling period and irrigation cutting in between beginning to end of grain filling period. The subplot was the different type of phosphorous fertilizer including control (no fertilizer application), Azoto Barvar 1 and Phosphate Barvar 2 and triple superphosphate. Results indicated that the interaction of irrigation cutting and phosphorous fertilizer was significant on seed yield, oil percentage, carbohydrates, proline, total protein, absorption of nitrogen, phosphorous and potassium. The greatest seed yield, oil percentage, total protein, nitrogen, potassium and phosphorus obtained at conventional irrigation along with the application of Azoto Barvar 1, while the greatest proline was achieved at irrigation cutting between beginnings to the end of grain filling period along with the application of triple superphosphate. The greatest carbohydrate was observed at irrigation cutting between beginnings to the end of the grain filling period along with the application of Phosphate Barvar 2. In conclusion, results indicated positive effects of biofertilizers on the improvement of nutritional conditions of plants under irrigation cutting conditions