S568 : The effect of irrigation period and mulch types on agronomic, physiological and weed management of rice dry direct seeding method
Thesis > Central Library of Shahrood University > Agricultural Engineering > MSc > 2021
Authors:
Naser Abbasi [Author], Mehdi Baradaran Firouzabadi[Supervisor], H. Pirdashti [Supervisor], Hassan Makarian[Advisor], Mostafa Heidari[Advisor]
Abstarct: Drought and water scarcity have been life- threatening in large parts of Iran. Due to the dissatisfaction with the current situation of water productivity in agriculture, especially submerged rice cultivation in low water areas, the introduction of rice production methods that require less water is one of the priorities. One solution is direct rice cultivation. Weeds are the main constraint on successful direct rice production. The effect of different levels of irrigation and types of mulch on agronomic, physiological and weed management characteristics of rice by drought method mulch was investigated on Gharatoghan Agricultural Jihad Service Center of Neka city. The experiment was performed as a split plot baxsed on a randomized complete block design in three replications. (3 and 6 days) in main plots and mulch treatment with nine levels (full weeding, single weeding, light plastic, dark plastic, rice bran, rice straw, sawdust, agate, watercress). Irrigation treatments and mulches were applied after germination of seeds (15 days after sowing). The interaction effect of irrigation cycle and mulching on weed density was significant at a probability level of 5%. The lowest weed density was in the irrigation cycle of 3 days with light plastic mulching and weeding once with an average of 6.67 weeds per square meter. Increasing the irrigation period from 3 to 6 days caused a significant decrease in stem dry weight, leaf area index, grain yield and grain length after ripening. Also, the sub-factor of mulch types was effective on traits such as weed dry weight, weed density, weed height, grain length after cooking and hatching coefficient. The results showed that doubling the irrigation interval from 3 to 6 days was effective on a small number of traits and once weed weeding in 45 days after planting in some cases is even better than using mulch.
Keywords:
#light and dark plastic #sawdust #watercress #rice straw and bran #weeding Keeping place: Central Library of Shahrood University
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