کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4511150 | 1321894 | 2009 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterizing leaf gas exchange responses of cotton to full and limited irrigation conditions
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
PFDEToFTSWintracellular CO2 concentrationWUEiVPDLepAYield - بازدهWater use efficiency - بهره وری استفاده از آبinstantaneous water use efficiency - بهره وری مصرف لحظه ایcrop evapotranspiration - تبخیر تعرق محصولreference evapotranspiration - تبخیر تعرق مرجعphoton flux density - تراکم شار فوتونstandard error - خطای استانداردLeaf temperature - دمای برگCanopy temperature - دمای سایبانLeaf area index - شاخص سطح برگLAI - شبیهCrop coefficient - ضریب محصولPhotosynthesis - فتوسنتزtranspiration rate - نرخ تنفسStomatal conductance - هدایت گرمایشیETc - و غیرهfraction of transpirable soil water - کسری از آب خاک خوردگی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Plant responses to water deficit need to be monitored for producing a profitable crop as water deficit is a major constraint on crop yield. The objective of this study was to evaluate physiological responses of cotton (Gossypium hirsutum) to various environmental conditions under limited water availability using commercially available varieties grown in South Texas. Soil moisture and variables of leaf gas exchange were measured to monitor water deficit for various varieties under different irrigation treatments. Lint yield and growth variables were also measured and correlations among growth parameters of interest were investigated. Significant differences were found in soil moisture, leaf net assimilation (An), stomatal conductance (g), transpiration rate (Tr), and instantaneous water use efficiency (WUEi) among irrigation treatments in 2006 while no significant differences were found in these parameters in 2007. Some leaf gas exchange parameters, e.g., Tr, and leaf temperature (TL) have strong correlations with An and g. An and WUE were increased by 30-35% and 30-40%, respectively, at 600 μmol (CO2) mâ2 sâ1 in comparison with 400 μmol (CO2) mâ2 sâ1. Lint yield was strongly correlated with g, Tr, WUE, and soil moisture at 60 cm depth. Relative An, Tr, and TL started to decrease from FTSW 0.3 at 60 cm and FTSW 0.2 at 40 cm. The results demonstrate that plant water status under limited irrigation management can be qualitatively monitored using the measures of soil moisture as well as leaf gas exchange, which in turn can be useful for describing yield reduction due to water deficit. We found that using normalized An, Tr, and TL is feasible to quantify plant water deficit.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Field Crops Research - Volume 112, Issue 1, 30 April 2009, Pages 77-89
Journal: Field Crops Research - Volume 112, Issue 1, 30 April 2009, Pages 77-89
نویسندگان
Jonghan Ko, Giovanni Piccinni,