Drought conditions

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  • Monthly rainfall data given by surface meteorological observations during the period 1961-2007 in Central Vietnam is used to calculate drought indices. Results show that drought conditions slightly increase in North Central Vietnam but decrease in South Central and Highland Central Vietnam. Significant drought periods often occur from January to March. The percentage of dry years during the period 1961-2007 is larger than that in the reference period of 1961-1990 in North Central while smaller in South Central and almost similar to that in Highland Central Vietnam.

    pdf7p dem_thanh 22-12-2012 19 3   Download

  • Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Drought conditioning improves water status, stomatal conductance and survival of Eucalyptus globulus subsp. bicostata seedlings...

    pdf10p toshiba5 15-09-2011 15 2   Download

  • Rice is one of the most important crop plants over the world. Our work studied on the physiological responses of rice seedlings (Oryza sativa cv. Dongjin) under drought condition by withholding water. In response to drought treatment, three-week-old rice seedlings exhibited typically morphological responses as leafs rolling and drying at 48 h after exposure to water deficit.

    pdf6p nganga_06 05-10-2015 13 2   Download

  • Dữ liệu lượng mưa hàng tháng được đưa ra bởi các quan sát khí tượng bề mặt trong thời gian 1961-2007 ở miền Trung Việt Nam được sử dụng để tính toán các chỉ số hạn hán. Kết quả cho thấy rằng các điều kiện hạn hán hơi tăng ở Bắc Trung Bộ Việt Nam nhưng lại giảm ở Nam Trung Bộ và Tây Nguyên Việt Nam. Đáng kể thời gian hạn hán thường xảy ra từ tháng một-Tháng ba.

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  • Read the text carefully and then choose the correct answers A .Drought is a condition that results when the average rainfall for a fertile area drops far below the normal amount for a long period of time. In areas that are not irrigated

    doc16p tuyenquang01 22-03-2010 160 95   Download

  • Plants are sessile organisms and as such must have mechanisms to deal with both abiotic and biotic stresses to ensure survival. The term “abiotic stress” includes many stresses caused by environmental conditions such as drought, salinity, UV and extreme temperatures. Due to global climate change it is predicted that abiotic stresses will increase in the near future and have substantial impacts on crop yields (Intergovernmental Panel of Climate Change; http://www.ipcc.ch).

    pdf397p thienbinh1311 13-12-2012 31 9   Download

  • Microalgae are prokaryotic or eukaryotic photosynthetic microorganisms that can grow rapidly and live in a wide range of ecosystems extending from terrestrial to aquatic environment. Environmental factors such as temperature, UV-light, irradiance, drought and salinity are known to affect their photosynthesis. Photosynthesis was the most sensitive process in microalgae, leading to numerous changes in structure and function of the photosynthetic apparatus under various conditions.

    pdf412p conquynho32 15-09-2012 40 7   Download

  • Under certain conditions, lichen floristic and community analyses can be used in conjunction with measured levels of ambient or depositional pollutants accumulated by lichens to detect effects of changing air quality on vegetation. This information can demonstrate whether air pollutants cause undesirable changes in species composition or presence/absence of lichen species within terrestrial plant communities. It is important that any alternative hypotheses (e.g.

    pdf38p saimatkhauroi 01-02-2013 14 4   Download

  • Stresses on the climate system are already causing impacts on Earth’s surface. These include not only rising surface temperatures, but also increasingly frequent floods and droughts, and changes in natural ecosystems, such as earlier flower- ing of plants, and poleward shifts in the distribution of several species. All of these changes are inextricably linked to the health of human societies.

    pdf80p quygia123 01-11-2012 27 0   Download

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