Gross primary production and ecosystem respiration of irrigated and rainfed maize–soybean cropping systems over 8 years
نویسندگان
چکیده
منابع مشابه
Estimation of gross primary production of irrigated maize using Landsat-8 imagery and Eddy Covariance data.
A study was conducted to understand the potential of Landsat-8 in the estimation of gross primary production (GPP) and to quantify the productivity of maize crop cultivated under hyper-arid conditions of Saudi Arabia. The GPP of maize crop was estimated by using the Vegetation Photosynthesis Model (VPM) utilizing remote sensing data from Landsat-8 reflectance (GPPVPM) as well as the meteorologi...
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Leaf respiration is an important component of carbon exchange in terrestrial ecosystems, and estimates of leaf respiration directly affect the accuracy of ecosystem carbon budgets. Leaf respiration is inhibited by light; therefore, gross primary production (GPP) will be overestimated if the reduction in leaf respiration by light is ignored. However, few studies have quantified GPP overestimatio...
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Carbon dioxide (CO2) exchange between the terrestrial ecosystems and the atmosphere is one of the major processes affecting atmospheric CO2 concentration. In various ecosystems in the world long-term observations of CO2 exchange have been made for assessing the role of terrestrial ecosystems in the present-day global CO2 budget and to predict its changes in the future climatic scenario. The edd...
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آب حاصل از بارش منبع تأمین نیازهای بی شمار جانداران به ویژه انسان است و هرگونه کاهش در کم و کیف آن مستقیماً حیات موجودات زنده را تحت تأثیر منفی قرار می دهد. نوسان سال به سال بارش از ویژگی های اساسی و بسیار مهم بارش های سالانه ایران محسوب می شود که آثار زیان بار آن در تمام عرصه های اقتصادی، اجتماعی و حتی سیاسی- امنیتی به نحوی منعکس می شود. چون میزان آب ناشی از بارش یکی از مولفه های اصلی برنامه ...
15 صفحه اولNitrous Oxide Emissions from Irrigated Cropping Systems
We evaluated the eff ects of irrigated crop management practices on nitrous oxide (N2O) emissions from soil. Emissions were monitored from several irrigated cropping systems receiving N fertilizer rates ranging from 0 to 246 kg N ha−1 during the 2005 and 2006 growing seasons. Cropping systems included conventional-till (CT) continuous corn (Zea mays L.), no-till (NT) continuous corn, NT corn–dr...
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ژورنال
عنوان ژورنال: Agricultural and Forest Meteorology
سال: 2012
ISSN: 0168-1923
DOI: 10.1016/j.agrformet.2012.05.021