نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد گروه مهندسی آب دانشکده علوم کشاورزی دانشگاه گیلان
2 استادیار گروه مهندسی آب دانشکده علوم کشاورزی دانشگاه گیلان
3 عضو هیئت علمی مرکز ترویج و توسعه تکنولوژی هراز، آمل
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
Proper water management in the paddy fields has an important role in the efficacy of other production inputs in rice cultivation. One of the important managements of paddy fields is mid-season drainage. To investigate the influence of surface mid-season drainage on growth and yield of rice cultivar Tarom-Hashemi, a field experiment was carried out in randomized complete block design with six treatments and three replications in Haraz Promotion and Technology Development Center in 2013. The experimental treatments were drainage duration of zero (control), 5, 7, 9, 11 and 13 days and their effects were determined on plant height, number of tillers, panicle length, grain filling percentage, harvest index, dry weight, leaf area index, crop growth rate, net assimilation rate and grain yield. Statistical analysis showed that the effect of midseason surface drainage on dry matter was significant and there were no significant difference for other studied characteristics in compared with control treatment. Application of midseason drainage increased the crop growth rate and net assimilation rate. Increasing midseason drainage duration to 13-day caused in decreasing grain yield as 13% with compared to control treatment. Therefore, in drought condition and due to midseason drainage benefits, duration of midseason drainage could be increased to 13-day without not-significant decreasing in grain yield.
کلیدواژه‌ها [English]
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