| 2 | 中宁县气候变化及农业适应对策显示文摘利用宁夏中宁县1954~2010年的气象资料,运用统计学方法,对该地区的气温、降水的变化特征和发展趋势进行了分析。研究结果表明,57年来中宁县的年、各季平均气温呈整体逐渐上升趋势,年均温倾向率为0.29℃/10a,冬季最大,为0.47℃/10a,平均最高气温倾向率为0.32℃/10a,平均最低气温倾向率为0.34℃/10a;年、春、夏、秋降水量均呈减少的态势,其倾向率分别为-9.34、-3.02、-6.15、-1.32 mm/10a,冬季降水量呈微弱增加趋势,其倾向率为0.11 mm/10a。气候总的趋势是变暖、变干、向高温干旱化方向发展。由于气候的变化,气象灾害发生频率增大。同时,分析了气候变化对农业的影响及适应对策。 | 于金华 陈虹 毛万忠 丁仲录 石宏磊 | 2012 | 安徽农业科学2012，40，3： | 1 |
| 3 | Growth and Physiological Response of Organs of Phragmites australis to Different Water Compensation in Degraded Wetlands显示文摘To study the effect of different water compensation on growth and physiology of reed in degraded wetlands,three water treatments in the field were conducted to test the height and photosynthesis of reed,the ions and soluble sugar contents of different organs.In the controls(without extra water compensation for 10 years),the height of reed was only 50 cm,the net photosynthetic rate,stomatal conductance,the intercellular CO2 concentration and transpiration rate were very low.The contents of Na + and Clin rhizome were higher than those in other organs.Discontinuous water compensation(continuous for 8 years,then stopped for 2 years)increased the height(2.1-fold),the net photosynthetic rate(41.8%),stomatal conductance(1.8-fold),transpiration rate(1.3-fold)of reed(Phragmites australis),and decreased the content of Na + (62.3%)and Cl- (71.1%)of rhizome significantly.Continuous water compensation(continuous for 10 years)increased the height(3.2-fold),the net photosynthetic rate(104%),stomatal conductance(2.4-fold),transpiration rate(1.5-fold)of reed,and decreased Na + (82.5%)and Cl - (64.7%)contents in rhizome, then accumulated the K+ ,H2PO4-,SO42- and soluble sugar contents significantly in rhizome.Interrupting water compensation led to the decrease of height(25.3%),the net photosynthetic rate(30.7%),stomatal conductance(17.3%) and increase of Na + (1.16-fold)in rhizome when comparing to the continuous water compensation.These results showed that recovering the degraded reed wetlands needed continuous water compensation yearly to promote reed growth.The organs of reed had corresponding physiological response characteristic to the different water compensation condition.Under long-time dry and waterlogging condition,the rhizomes both helped reed to adapt located environment,by enriching the ions such as Na+ ,Cl- ,and K+ ,H2PO4-,SO42- ,respectively. | LI Xiaoyu LIU Xingtu LI Xiujun LIN Jixiang WEN Bolong | 2012 | 湿地科学2012，10，1： | 1 |
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