کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5758530 | 1622894 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of water table management on least limiting water range and potato root growth
ترجمه فارسی عنوان
اثرات مدیریت آب بر روی حداقل دامنه محدود آب و رشد ریشه سیب زمینی
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کلمات کلیدی
BDCSPRCRTLRSASeepage irrigationSWRCSOM - WHOavailable water - آب در دسترس استcrop evapotranspiration - تبخیر تعرق محصولAir-filled porosity - تخلخل هواbulk density - تراکم فلهAFP - تست AFP یا آلفا فیتو پروتئینSandy soils - خاک های شنیLeast limiting water range - دامنه حداقل محدود آبroot surface area - سطح ریشهCoefficient of Variation - ضریب تغییرtotal root length - طول ریشه مجموعField capacity - ظرفیت میدانRoot diameter - قطر ریشهSoil organic matter - ماده آلی خاکSoil water content - محتوای آب خاکPenetration resistance - مقاومت نفوذSoil water retention curve - منحنی احتباس آب خاکWilting point - نکته تکان دهندهETc - و غیرهMatric potential - پتانسیل ماتریسSoil bulk density - چگالی فله خاک
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
چکیده انگلیسی
Soil physical quality indicator, Least Limiting Water Range (LLWR) is the range of soil water content, where water, oxygen and mechanical resistance are not limiting factors to root growth. The objective of this study was to evaluate LLWR, soil water availability, potato root growth and tuber yield under different water table management levels. Water table level was managed targeting 0.36 and 0.76Â m below the soil surface, denoted as high (HI) and low (LO) level, respectively. Undisturbed soil core samples were obtained in the 0-0.15, 0.15-0.30 and 0.30-0.45Â m soil layers to assess the LLWR. Root parameters were assessed using mini-rhizotrons installed into the soil along the potato row. Overall, LLWR decreased in depth due to a decrease in soil organic matter and an increase soil bulk density. The LO resulted in a narrower range for LLWR than HI. In the 0-0.15Â m soil layer, the soil water content in the HI treatment fell inside the LLWR limits with high frequency during the growing season, but both water table levels resulted in similar root growth. In contrast, in the 0.15-0.30 and 0.30-0.45Â m soil layers, soil water content fell inside LLWR more frequently in the LO than HI treatment. The LO management increased potato root length and surface area in the 0.15-0.30Â m soil layer compared to HI; while in the 0.30-0.45Â m soil layer, roots were not present in the HI likely due to the soil water content that was above LLWR. Optimal potato root growth was observed when the soil water content fell within the LLWR range at the highest frequency during the season. Despite impacts on the root system, similar tuber yields were achieved between LO and HI treatments. Nevertheless, the treatment HI used three times more water to supply the crop water requirement than LO.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agricultural Water Management - Volume 186, 31 May 2017, Pages 1-11
Journal: Agricultural Water Management - Volume 186, 31 May 2017, Pages 1-11
نویسندگان
Camila Jorge Bernabé Ferreira, Lincoln Zotarelli, Cássio Antonio Tormena, Libby R. Rens, Diane L. Rowland,