Document Type : Research Paper
Authors
Sararood Deputy, Dryland Agricultural Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Kermanshah, Iran.
Abstract
Introduction: The first step to produce certified seeds is to prepare pure seed kernels. For this purpose, for the ease of identification and removal of mixed seeds and to ensure the purity of the obtained seeds, full cluster cultivation is used instead of seeds, which is known as Breeder seed. The problem of Breeder seed is high cost and very low yield per unit area. In order to increase yield per unit area and reduce production cost, steps should be taken to mechanize this type of cultivation. In this regard, a rowing cluster device was designed and built, which performs the operation of tapping a single cluster and simultaneously planting the seeds in it.
Methodology: To check the efficiency of the row worker cluster, a factorial experiment was conducted in the form of a completely randomized design with three factors in three replications. The factors include the rotating speed of the Threshing drum in three levels, the distance between Threshing drum and Concave in 2 levels and the diameter of the Concave holes in three levels. The studied traits were 1- the average length of the axis of the wheat spike after threshing in mm, 2- the degree of threshing in percent and 3- the amount of seed breakage in percent. Analysis of data variance was done with SAS software and comparison of means was done with least significant difference (LSD) test.
Research findings: With this explanation, speeds of 600 and 450 rpm are not recommended due to high seed breakage. The most suitable rotational speed of the thresher is 300 rpm because at this rotational speed, seed breakage is at its lowest. In general, the best performance of the rowing machine cluster is obtained by choosing a speed of 300 rpm for the drum, a diameter of 7 mm for the Concave holes and a distance of 5 mm between the Threshing drum and Concave.
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