Hassan Akhgari; Behzad Kaviani
Abstract
An experiment as factorial with completely randomized block design with four replications during two continuous years (2019-2020) was carried out in order to evaluate the efficiency of rice (Oryza sativa L.) by seed tape technology and its comparison with transplanting and traditional direct seeding ...
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An experiment as factorial with completely randomized block design with four replications during two continuous years (2019-2020) was carried out in order to evaluate the efficiency of rice (Oryza sativa L.) by seed tape technology and its comparison with transplanting and traditional direct seeding cultivations. The first factor consisted of two rice cultivars (Khazar and Hashemi) and the second one consisted of ten levels of seed priming treatment with three methods (transplanting, traditional direct and direct with seed tape technology). The two main challenges of rice production in traditional transplanting and direct seeded methods are the high share of labor and the increased cost. Therefore, new methods of cultivation should be sought to reduce the cost of rice production. In the present study, direct seeded of rice with seed priming treatments and seed tape technology, with reduction of labor and cost is presented. Agronomy parameters and cost production factors were evaluated in these three methods. The results showed that the use of direct seeded method with seed tape technology increased rice yield by eight percent and saved 25 percent in cost, as well as a 11 percent reduction during the growing period, 30 percent in the number of labor per hectare, 26 percent in the production cost per kilogram of white rice and 2.2 percent in the cost-benefit index in Hashemi cultivar compared to the cultivation method. Therefore, direct seeded with seed tape technology, done for the first time in Iran, is effective in reducing the cost of rice production.
Ali Mohammadi Torkashvand; Maryam Mirhoseini Moghadam; Behzad Kaviani
Abstract
Climatic conditions of Guilan have caused to develope Azolla growth in wetland and ponds. Regarding environmental problems of Azolla accumulation, a study was conducted to investigate impact of composted Azolla with nutrient solution on the growth of Dracaena in replacement of peat in Ornamental Plants ...
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Climatic conditions of Guilan have caused to develope Azolla growth in wetland and ponds. Regarding environmental problems of Azolla accumulation, a study was conducted to investigate impact of composted Azolla with nutrient solution on the growth of Dracaena in replacement of peat in Ornamental Plants and Flower Research Station, Lahijan, Iran. The control treatment was a 2:1 ration of peat: perlite and peat was replaced by composted Azolla amounted 0, 25, 50, 75 and 100% v/v. The research was conduced by factorial experiment based on a compeletely randomized design in three replicates with 90 plants. Substrate properties including bulk density, porosity, electrical conductivity, pH, C/N ratio and phosphorus, potassium, iron, zinc and manganese concentrations were measured. Plant growth Indexes including leaf and stem dry weight, leaf and stem fresh weight, plant height, stem diameter and number of leaves were measured. The results showed that the highest growth was observed at 75% and 100% Azolla compost with nutrient solution and the lowest growth obtained at control and 25% composted Azolla. Azolla compost without nutrient solution had a greater effect on plant growth as compared with control even with the consumption of nutrient solution.