نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار پژوهش، بخش تحقیقات فنی و مهندسی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی خوزستان، سازمان تحقیقات، آموزش و ترویج کشاورزی،
2 استادیار پژوهش، بخش مکانیزاسیون و ماشین‌های کشاورزی، موسسه تحقیقات فنی و مهندسی کشاورزی، سازمان تحقیقات، آموزش و ترویج کشاورزی،
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
This study was conducted to select a suitable method for rice dirrect seeding in dry-bed condition (RDD) in Khuzestan province in a randomized complete block design with three replications. Four planting methods include: RDD in flat bed with grain drill machine (P1), RDD on the ridge bed (P2), RDD on the ridge bed with hill-drop seeding (P3), and CRP or control (P4) in terms of index Economic, technical, crop yield and water consumption were compared. in all treatments, Champa, Anboury and Aerobic rice cultivars were cultivated. Irrigation method was intermittent in RDD treatments and permanent flooding in control treatment (P4). Seed consumption per hectare of main land in P1 and P2 was 100 kg.ha-1, in P3 it was equal to 5 seeds per hill and For P4 (control) was 40 kg.ha-1. The results showed that the time required for P1 to P4 (control), were 1.2, 1.7, 1.4 and 265.9 h.ha-1, respectively. In terms of grain yield, there was no significant difference between cultivars and planting methods. The results of this study showed that in terms of irrigation water volume index and its physical productivity, there was a significant difference between planting methods. The volume of irrigation water in conventional transplanting method with permanent flood irrigation was 35221 m3.ha-1, while this index for P1 to P3 RDD methods with intermittent irrigation cycle once every four days, compared to control (P4) decreased by 34, 49 and 49%, respectively. Physical water productivity (FWP) was 0.10 kg.m3-1 for conventional planting method and 0.15, 0.23 and 0.20 kg.m3-1 for RDD methods P1 to P3, respectively. Economic comparison of different planting methods also showed that for rice production in Khuzestan, the use of aerobic cultivar with RDD on the ridge bed with hill-drop seeding and intermittent irrigation, due to the highest net income of 730 $.ha-1 (9.4 times the conventional transplanting method), the highest income-to-cost ratio of 2.62 and the lowest volume of irrigation water at 17,800 m3.ha-1 (50% less than the control) is the best option.
کلیدواژه‌ها [English]
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