کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10876991 | 1075898 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sap flow, gas exchange, and hydraulic conductance of young apricot trees growing under a shading net and different water supplies
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
ΨlΨsWUEVPDTDFGMTMDSθvWater use efficiency - بهره وری استفاده از آبphotosynthetic active radiation - تابش فعال فتوسنتزیTranspiration - تعرقWater stress - تنش آب یا بحران آبPar - توسطmaximum daily shrinkage - حداکثر انقباض روزانهnet photosynthesis - فتوسنتز خالصSoil water content - محتوای آب خاکLeaf stomatal conductance - هدایت ورقه ورقه برگLeaf water potential - پتانسیل آب برگSoil water potential - پتانسیل آب خاکvapour pressure deficit - کسری فشار بخار
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Sap flow, gas exchange, and hydraulic conductance of young apricot trees growing under a shading net and different water supplies Sap flow, gas exchange, and hydraulic conductance of young apricot trees growing under a shading net and different water supplies](/preview/png/10876991.png)
چکیده انگلیسی
The experiment was carried out in a research field near Murcia, Spain, over a 3-week period between September 26 and October 16, 2000. Sixteen trees were used in the experiment, eight of which were placed under a rectangular shading net, while the other eight were maintained in the open air. Trees were irrigated once per day and, after October 5th, water was witheld from eight trees (four shaded and four unprotected for 5 days). The leaf stomatal conductance and the photosynthesis rates were higher in the shaded trees than in the exposed plants, probably because the leaf water potential was lower in the unshaded plants. This higher leaf conductance partially compensated for the effect of low radiation on transpiration, and the reduction of daily sap flow registered in shaded trees was only around 10-20%. The net also affected trunk diameter changes, with the shaded trees showing lower values of maximum daily shrinkage. Soil water deficit and high radiation had a similar effect on plant water parameters, lowering leaf water potential, leaf stomatal conductance, and the photosynthesis rate. The effects of both conditions were accumulative and so the exposed water-stressed plants showed the lowest values of total hydraulic resistance and water use efficiency, while the shaded well-irrigated trees registered the highest values for both parameters. For this reason, we think that net shading could be extended to apricot culture in many areas in which irrigation water is scarce and insolation is high.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Plant Physiology - Volume 162, Issue 4, 22 April 2005, Pages 439-447
Journal: Journal of Plant Physiology - Volume 162, Issue 4, 22 April 2005, Pages 439-447
نویسندگان
Emilio Nicolás, Arturo Torrecillas, José Dell` Amico, Juan José Alarcón,