Agriculture and horticulture
Gh.R. Pourshaban Kateshali; Gh.A. Akbari; I. Alahdadi; E. Soltani
Abstract
To evaluate the plant adaptation and effects of irrigation cycles and NPK elements on growth and yield parameters of Zingiber officinale R., a split-plot experiment was conducted as a randomized complete block design with nine treatments and three replications in two regions including Pakdasht (Tehran ...
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To evaluate the plant adaptation and effects of irrigation cycles and NPK elements on growth and yield parameters of Zingiber officinale R., a split-plot experiment was conducted as a randomized complete block design with nine treatments and three replications in two regions including Pakdasht (Tehran province) and Lahijan (Gilan province) in 2021. The experimental factors included irrigation cycle at three levels (4 (V1), 6 (V2), and 8 (V3) days) as the main factor and NPK elements at three levels (N300P100K200 (F1), N350P150K250 (F2), and N250P50K150 (F3) (kg.ha-1)) as the sub-factor. The results showed that the irrigation×NPK effects was significant on plant height, number of leaves per plant, leaf area, number of branches per plant, leaf area index, fresh and rhizome dry weight, and rhizome yield at the 1% probability level and on stem diameter at the 5% probability level in Pakdasht region. The V1F2 treatment was the best one in this region. In Lahijan region, the irrigation×NPK effects was significant on number of leaves per plant and rhizome yield at the 1% probability level and on plant height and stem diameter at the 5% probability level. The best result in Lahijan was obtained in the V1F2 treatment. Also, in terms of leaf area, number of branches per plant, and leaf area index, V1 and F2 was the best treatments in Lahijan. Fresh and rhizome dry weight had the best results in the V2 and F2 treatments. Overall, the studied traits in Lahijan climate were superior to Pakdasht climate and every 4 days irrigation for Pakdasht and every 6 days for Lahijan had the best results.
A. Nasrollahi; I. Alahdadi; M. Ghorbani Javid; M.S. Hoseinifard
Abstract
linoleic acid, oleic acid, planting date, seed filling stage, oil yield. fatty acid composition of pumpkin (Cucurbita pepo convar. pepo var. styriaca), a split plot experiment was conducted in a randomized complete block design with three replications during 2013-2014. Three planting dates (21 April, ...
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linoleic acid, oleic acid, planting date, seed filling stage, oil yield. fatty acid composition of pumpkin (Cucurbita pepo convar. pepo var. styriaca), a split plot experiment was conducted in a randomized complete block design with three replications during 2013-2014. Three planting dates (21 April, 22 May, 22 June) as the main factor and application of methanol (30% V/V) in four levels (control, pre-production phase, post-production phase, seed filling stage) were studied as the sub factor. Results showed that the interaction effect of planting date and application of methanol on seed yield in fruit, seed dry weight, 1000-seed weight, fruit yield, oil percentage and fatty acids compositions were significant at 1% probability level. The highest seed yield, seed dry weight, fruit yield, and oil content were obtained in the methanol foliar application in the pre-production phase in June 22. The highest 1000-seed weight (1155.6 g) was belonged to the methanol foliar application in the post-production phase in June 22. The foliar application treatments in seed filling stage in June 22 and control treatment also in May 22 showed the highest amount of oleic acid. The highest amount of linoleic (43.36%), linolenic (1.86%), and palmitic (21.20%) acids was obtained under methanol foliar application in the post-production phase in May 22, June 22 and April 21, respectively. The control treatment showed the highest amount of stearic acid (11.5٪) in the first planting date (April 21). Finally, the planting date of medicinal pumpkin in June 22 with foliar application of methanol in the pre-production phase in order to increasing of yield, and foliar application in the post-production phase to improve the qualitative traits of oil are recommended.
