شاخص‌های جمعیتی علفهای هرز نظام‌های زراعی تک‌کشتی پیاز (.Allium cepa L) در منطقه جیرفت
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Abstract:
To study the weed population indexes of onion (Allium cepa L.) monoculture systems in the Jiroft area, four onion continuous monocultures, including less 3 (S1), 3-5 (S2), 5-8 (S3), more than 8 (S4) years and long-term fallow (F) were sampled by systematic randomized method in three stages: before sowing, 60 days after planting and 30 days after harvest, during 2015-2016. Of the 28 weed species, 16 species were observed in all systems. The analysis of variance showed that the monoculture system had a significant effect on the density of the weed species including Cyperus rotundus, Malva neglecta, Heliotropium europium and Chenopodium murale and the density of these species were was 14.64, 14.16, 13.90 and 11.97 weeds per square meter, respectively. Increasing the in monoculture duration from three to more than eight years led to enhancing increased the density of the weed species. The assessment of the onion monoculture duration had a significant effect on the weed diversity indexes. The maximum indexes of Simpson, Shannon, Menhinick and evenness in the S4 system were 0.92, 2.76, 0.90 and 0.99, respectively, and they were the lowest in the F system (0.78, 0.89, 0.78, and 0.95, respectively). In general, the onion continuation cropping increased the weed density of each weed and significantly enhanced the species diversity indexes.
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تاثیر کنترل مکانیکی و شیمیایی علفهای هرز بر عملکرد پیاز خوراکی (Allium cepa L.) در کشت نشایی پاییزه استان هرمزگان
به منظور بررسی تاثیر روشهای کنترل مکانیکی و شیمیایی علفهای هرز بر عملکرد پیاز خوراکی در کشت نشایی پاییزه استان هرمزگان آزمایشی در قالب طرح بلوکهای کامل تصادفی با 8 تیمار در سه تکرار در مزرعه تحقیقاتی مرکز جهاد کشاورزی دهستان شمیل از توابع شهرستان بندرعباس در سال زراعی 95-1394 انجام شد. تیمارها شامل: شاهد (بدون کنترل)، اکسی فلورفن(گل) (EC%24) به میزان 2 لیتر در هکتار، ستوکسیدیم(نابواس) (EC%12....
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زمینه و هدف: زالو از عوامل بیماری های زئونوز انگلی نوظهور و نوپدید می باشد و مهم ترین عارضه آلودگی با آن بروز کم خونی است. تاکنون در فارماکوپه ملل مختلف دنیا، دارویی برای درمان عوارض زالو ثبت نشده است. پیاز و سیر گیاهانی هستند که عصاره آنها در طب سنتی به وفور مورد استفاده قرار می‌گیرد و معتقدند که اثرات سودمندی به عنوان یک گیاه ضد انگل دارد. این مطالعه با هدف مشخص نمودن اثرات ضد زالویی عصاره ها...
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An experiment was conducted to study the effect of sulphur application on growth, yield and quality of onion at Horticulture Farm of Institute of Agriculture, Visva-Bharati, Sriniketan. The treatments consisted of six incremental doses of sulphur application (10, 20, 30, 40, 50 and 60 kg ha-1) and no sulphur application (control, 0 kg S ha-1). Treatments were arranged in Randomized Block Design...
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Journal title
volume 7 issue 3
pages 1- 11
publication date 2019-03
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