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بررسي تأثير توام تنش آبي دوره¬اي و شوري ناشي از آب درياي خزر بر عملکرد پنبه‏
عنوان (انگلیسی): Investigation of Simultaneous effect of periodic water stress and salinity of Caspian ‎ Sea water on cotton yield
نشریه: پژوهش آب ايران
شماره: پژوهش آب ايران (دوره: ۱۰، شماره: ۳)
نویسنده: افشاری، رقیه ، ذاكري ‌نيا، مهدي ، پهلوانی، محمدهادی
کلیدواژه‌ها : درياي خزر ، تنش خشكي ، آب شور ، وش
کلیدواژه‌ها (انگلیسی): Caspian Sea , Salt water , Cotton‎ , Water stress
چکیده:

در اين مطالعه اثر تنش آبي دوره¬اي و شوري ناشي از آب درياي خزر بر عملکرد پنبه به صورت آزمايش فاکتوريل در قالب طرح ‏بلوک کامل تصادفي مشتمل بر 20 تيمار در سه تکرار در بهار 1391 در مزرعه تحقيقات کشاورزي دانشگاه علوم کشاورزي و ‏منابع طبيعي گرگان انجام شد. تنش آبي دوره¬اي در 4 سطح شامل ‏I1‎‏ تنش اوليه،‏ ‏I2‎‏ تنش توسعه مرحله اول،‏ ‏I3‎‏ تنش ‏توسعه مرحله دوم،‏I4 ‎‏ تنش مرحله مياني رشد پنبه و تنش شوري در 5 سطح ‏S1‎،‏ ‏S2‎،‏S3 ‎،‏‎ S4 ‎و ‏S5‎‏ به ترتيب اختلاط 0،‏ ‏‏25،‏ 50،‏ 75 و 100 درصد آب درياي خزر با آب معمولي با شوري 7‎/0،‏ 1‎/4،‏1‎/11،‏ 1‎/18 و 4‎/25 اعمال شد. نتايج نشان داد ‏تنش آبي دوره¬اي و شوري ناشي از آب درياي خزر بر ارتفاع بوته،‏ وزن غوزه،‏ عملکرد وش در سطح يک درصد و بر تعداد غوزه ‏در سطح پنج درصد معني¬دار است. به علت اينکه اختلاف عملکرد وش در اختلاط 25% آب دريا و تنش دوره اوليه مرحله ‏توسعه،‏ با تيمار شاهد نسبت به ديگر تيمارها کمتر بود به عنوان يک گزينه مناسب براي استان¬هاي شمالي توصيه مي¬شود.‏

چکیده (انگلیسی):

Water is undoubtedly one of the factors of production and reduce water consumption reduces the yield. The decrease yield due water stress is different but the decrease yield due to water stress is inevitable. Due to limited water resources in Iran or deficit irrigation water stress on crops is inevitable. Also we probably will have the use of saline water for agricultural production. In Iran saline land area of about 44.5 million hectares with various salinity and alkalinity, which is 27% of the land area of the country are mainly in the central plateau and southern and Caspian Sea coasts. The use of saline water for agricultural production is used successfully in crops such as cotton, wheat, barley and sugar beet and preceding studies in science of these cases will help to promote and self-sufficiency. Water stress one of the methods irrigation management and it is an engineering technique used to provide part of the water plants to supply part of the unit volume of water in shortage water Salinity of water resources same and soils in Iran is one of the problems inhibiting their effective application in agriculture. Furthermore it is tried to use from unconventional water same as Caspian Sea for compensation of this water shortage especially in drought condition of Northern provinces. The combined effects of water stress and salinity of the Caspian Sea periodically on cotton yield in agricultural research farm of Gorgan University of Agricultural Sciences and Natural Resources investigated. With the passage of time world deficit problems and inaccessibility to sure resources is facing. In such a situation providing procedures the utilization of sea water and retrofitting plants to salinity is of special importance accordingly study under the title investigation of Simultaneous effect of periodic water stress and salinity of Caspian Sea water on cotton yield at research farm Gorgan University of Agricultural Sciences and Natural Resources was carried.Various reports have been presented on the effect of salinity on cotton. Some research suggests it be the 6,000 mg of salt per liter of water with good performance and not affects the quality of cotton fiber and seeds. In this study, the effect of water and salinity stress from the Caspian Sea on cotton yield was studied. The research is based on factorial experiment in completely block design (CRD) including 20 treatments and 3 replicates in farm of Gorgan University of Agriculture on spring 2012. three cotton seed of Golestan varieties were planted in lysimeters with diameter 35 cm and an average height of 70 cm. Lysimeters distances were a meter. To measure the cotton water requirement it is use a pan (class A), also the effective rain during the cultivation was measured with an rain gauge that installed beside the research farm. Periodic water stress in four stage (Initial, early stage of development, second stage of development, midseason) was applied and salinity stress of Sea water at 5 levels (0% 25%, 50%, 75% and 100% mixture of Caspian sea water into ordinary water) with Salinity of 0.7, 4.1, 11.1, 18.11, 25.1 (dS/m) respectively.
Results: Result showed that the effect of Periodic water stress and salinity from Caspian Sea water on Plant height, boll weight, seed cotton yield was significant at the 1% level. But its effect on boll number was significant at 5% level. Also the interaction water stress and salinity of boll weight , seed cotton yield and plant height was significant at 1% level but the interaction water stress and salinity at the boll number was not significant. the soil salinity different level highest were s5 level
Conclusions:
Periodic water stress also increases the salinity. The increase was higher than in the midseason period due to the length of this period other periods Because the difference between the control treatment was lower than other treatment it is proposed to use Caspian Sea water (25% mixture with ordinary water) at early stage of development stages for wheat cultivation recommended an appropriate option for the northern provinces. Because of low differences between control treatment and treatment with 25% mixture of Sea water with ordinary water compare to other treatments, it is proposed to use 25% mixture of Caspian Sea water specially at early of development stages of cultivation as an appropriate option for the Iran's northern provinces.

فایل مقاله : ‏175 دریافت تاكنون
صاحب امتیاز:
دانشگاه شهرکرد
مدیر مسئول:
دکتر حسين صمدی
سردبیر:
دکتر منوچهر حيدرپور
مدیر داخلی:
دکتر محمدعلی نصراصفهانی