جستجوی مقالات مرتبط با کلیدواژه « Corm density » در نشریات گروه « زراعت »

Proper plant density and emphasis on high density cultivating patterns and mother corm weight during the first years of cultivation to achieve high yield and reduce the length of the operation cycle of saffron farms, should be considered by farmers. The effects of plant density and mother corm weight on flower yield and growth characteristics of saffron were evaluated under field conditions. Treatments were three levels of plant density (100, 200 and 300 per m2) and three mother corm weights (0.1- 4, 4.1- 8 and 8.1- 12 g). The experiment was designed as factorial arrangement based on randomized complete block design with three replications at the Research station of Faculty of Agriculture University of Birjand during growing season of 2016-2017. The results indicated that plant density and corm weight had significant effect on the fresh weight of flower, fresh yield of flower, dry yield of stigma and fresh weight of leaf. There were significant different between some characteristics (fresh yield of flower and dry yield of stigma) by interaction plant density and corm weight treatments, so that, the highest fresh yield of flower and dry yield of stigma were obtained (9.88 and 2.41 kg/ha, respectively), from corm weight with 8.1-12 g and plant density with 300 corm/m2, and the lowest were observed from corm weight with 0.1-4 g and plant density of 100 corms per m2. The highest fresh weight of leaves and flower were obtained from 8.1-12 g and 300 corms per m2. Also, the highest and lowest attributes of flower were observed from corm weight with 8.1-12 g and 0.1-4 g, respectively. It was found that corm weight had significant effect on leaves characteristics (length, fresh weight and dry weight of leaf, chl a, chl b and total chl), so that the highest these attributes were obtained from corm weight with 8.1-12 g. In general, the use of corm weight 8.1-12 g and plant density 300 corms per m2 had an effective role in increasing the yield of saffron.

In this study, the effects of agronomic management such as crop residue corm density and planting depth on flower and daughter corm criteria and quality of saffron under on-farm conditions at the Organic Field, Ferdowsi University of Mashhad during two growing seasons of 2018-2019 and 2019-2020 were evaluated as strip plot based on randomized complete block design with three replications. Treatments were crop residue (0 and 6 tons of wheat straw per ha), corm density (10, 20 and 30 t.ha-1) and planting depth (8 and 15 cm). Studied criteria were flower numbers per area, fresh flower yield, dried stigma yield, total weight of daughter corms, total number of daughter corms, daughter corm diameter, mean weight of daughter corm and quality (picrocrocin, safranal and crocin). Results showed that the simple effects of crop residue, corm density and planting depth were significant on flower yield, growth and daughter corm yield of saffron in the second year (p≤0.05). The simple and interaction effects of these factors were not significant on quality. Crop residue application were enhanced the flower number, dried weight of stigma, dried weight of daughter corms and number of daughter corms per m2 up to 15, 18, 15 and 3 percent compared with control, respectively. The highest flower number, dried weight of stigma, dried weight of daughter corms and number of daughter corms were observed with 20 ton corms per ha with 326.41 flowers.m-2, 410.18 mg.m-2, 1042.66 g.m-2 and 140.17 daughter corms.m-2, respectively. Increasing planting depth from 8 to 15 cm improved flower number, dried weight of stigma, dried weight of daughter corms and number of daughter corms per m2 up to 11, 15, 45 and 2 percent compared with control, respectively.

In order to study the effect of planting density on flower and corm yield of Spanish and Iranian saffron (Crocus sativus L.) types, an experiment was arranged in factorial with randomized complete block design with three replications. This experiment was conducted on the Research Farm of the Faculty of Agriculture, Ferdowsi University of Mashhad in 2013-15. The saffron corm type was considered in two levels (a1: Iranian corm and a2: Spanish corm) and the planting densities were in three levels (d1:40, d2:48 and d3:60 corm.m-2). The two year results showed that the effect of different planting density and saffron corm types on the number of flowers, flower fresh and dry weight (stigma style) and number of replacement corms were significant (P

Effect of irrigation levels and high corm density on growth and phosphorus uptake of daughter corms of saffron (Crocus sativus L.) was studied under a field experiment as split-plot arrangement in complete randomized block design with three replications at Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran, during 2012 and 2013. The irrigation levels were applied based on saffron water requirement (50, 70 and 100%) and high corm density (50, 100, 200 and 300 corms.m-2) were assigned and randomized in the main and sub plots, respectively. Results showed that the lowest corm number, yield and phosphorus content of corms (178.67, 450.11 and 0.65 g.m-2, respectively) were observed by sowing 50 daughter corms per m2 + 50% irrigation. In addition, the highest corm number, yield and phosphorus content of corm 806.67, 2709.18 and 3.38 g. m-2, respectively) were obtained by sowing 300 daughter corms per m2 + 100% irrigation. In the first year, flower characteristics of saffron was not affected by 50% irrigation. However, in the second year, flower number, fresh flower and dry stigma yields significantly decreased by supplying 50% water requirement of saffron (by 19, 28 and 22%, respectively) as compared to control (100% water requirement). Considering the economic value of irrigation water in arid and semi-arid regions of Iran, the irrigation scheduling based on 75% crop water requirement may be reasonable.