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۱A Review on Partial Root–Zone Drying Irrigation
نویسنده(ها): ،
اطلاعات انتشار: International Journal of Plant Production، چهارم،شماره۴(پياپي ۱۴)، Oct ۲۰۱۰ ، سال
تعداد صفحات: ۱۸
Available fresh water resources are subjected to an ever–increasing pressure due to extensive agricultural water demand for irrigated lands. A long–term perspective in shortage of fresh water resources, especially in arid and semi–arid area, highlights an urgent solution for innovative irrigation strategy and agricultural water management. This paper is a review on the wide applications of the partial root–zone drying irrigation (PRD) on diverse plant species. The PRD irrigation is a novel improvement of deficit irrigation in which half of the root zone is irrigated alternatively in scheduled irrigation events. In the last decade, scientists across the world, especially from arid to semi–arid countries, have extensively evaluated this irrigation as a water–saving irrigation strategy on agronomic and horticultural plants. This review paper focuses on the physiological and morphological aspects of PRD on plants and its ultimate impact on yield and water productivity. Overall, under limited water resources where water is precious, PRD is a viable irrigation option to increase water productivity while marinating the yield, rather than only increasing the economic yield without concerning the value of water in limited water environments. Keywords: Partial root–zone drying irrigation; Full irrigation; Water productivity; Field crops; Vegetables;

۲Interaction of different irrigation strategies and soil textureson the nitrogen uptake of field grown potatoes
اطلاعات انتشار: International Journal of Plant Production، پنجم،شماره۳(پياپي ۱۷)، Jul ۲۰۱۱، سال
تعداد صفحات: ۱۲
Nitrogen (N) uptake (kg ha–1) of field–grown potatoes was measured in 4.32 m2 lysimeters that were filled with coarse sand, loamy sand, and sandy loam and subjected to full (FI), deficit (DI), and partial root–zone drying (PRD) irrigation strategies. PRD and DI as water–saving irrigation treatments received 65% of FI after tuber bulking and lasted for six weeks until final harvest. Results showed that the irrigation treatments were not significantly different in terms of N uptake in the tubers, shoot, and whole crop. However, there was a statistical difference between the soil textures where plants in the loamy sand had the highest amount of N uptake. The interaction between irrigation treatments and soil textures was significant, and implied that under non–limiting water conditions, loamy sand is the suitable soil for potato production because plants can take up sufficient amounts of N and it could potentially lead to higher yield. However, under limited water conditions and applying water–saving irrigation strategies, sandy loam and coarse sand are better growth media because N is more available for the potatoes. The simple yield prediction model was developed that could explains ca. 96% of the variations of fresh tuber yield based on the plant evapotranspiration (ET) and N uptake in the tuber or whole crop.
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