欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
【目的】分析气候变化背景下东北三省主要作物类型（水稻、玉米、春小麦和大豆）典型物候期（出苗期、抽穗期和成熟期）的变化趋势。【方法】应用气候倾向率（θ）确定农业气候资源特征和典型物候期的变化趋势与整体对应关系。【结果】近20年来,东北三省大部分地区≥10℃初日出现了提前趋势,初霜日不断推迟,温度生长期天数持续增加,≥10℃积温总体呈升高趋势。在此背景下,水稻和玉米均出现了出苗期提前（0.04〈θ〈0.55 d.a-1和0.04〈θ〈0.35 d.a-1）、成熟期推后（0.09〈θ〈0.35 d.a-1和0.23〈θ〈0.38 d.a-1）、以及生育期延长（0.31〈θ〈1.26 d.a-1和0.11〈θ〈0.57 d.a-1）的趋势;大豆则表现为出苗期提前（0.01〈θ〈0.61d.a-1）、成熟期提前（0.18〈θ〈0.19 d.a-1）、生育期缩短（0.06〈θ〈0.17 d.a-1）的趋势;而春小麦典型物候期的变化趋势不明显。【结论】东北三省农业气候资源变化使作物生长期内温度适宜程度偏向好转,总体上有利于早种晚收、生育期长的作物品种的推广种植。
英文摘要：
【Objective】 The objective of this research is to analyze the phenophases（including the stages of seeding,heading and maturity） changes of rice,maize,spring wheat and soybean in three provinces of Northeast China.【Method】Annual slope change rate（θ） was computed to evaluate the temporal trend and the relationship between agroclimate and phenophases.【Result】Over the past 20 years,the timing of first effective temperature date（T≥10℃） was advanced,the first frost date was postponed,the growth period was continually extended and the accumulated temperature（T≥10℃） was increased in most area of the three provinces.Under this background,the temporal trend of phenophases of both rice and maize showed an advanced seeding stage（0.04θ0.55 d？a-1 and 0.04θ0.35 d？a-1）,a postponed maturity stage（0.09θ0.35 d？a-1 and 0.23θ0.38 d？a-1） and an extended length of growth period（0.31θ1.26 d？a-1 and 0.11θ0.57 d？a-1）.By contrast,temporal trend of soybean phenophases was different and characterized by an advanced seeding stage（0.01θ0.61 d？a-1）,a maturity stage（0.18θ0.19 d？a-1）,and a shortened growth period（0.06θ0.17 d？a-1）.As for spring wheat,there was no obvious temporal change for the phenophases.【Conclusion】Climate change resulted in the increase of temperature suitability for crops,which could benefit from an early seeding stage,a late maturity stage and a long growth period.
同期刊论文项目
同项目期刊论文
Proposing an interdisciplinary and cross-scale framework for global change and food security researc
Global-scale modelling of potential changes in terrestrial nitrogen cycle from a growing nitrogen de
Simulated impact of elevated CO2, temperature and precipitation on winter wheat yield in North China
Study on the feasibility and reasonability of the calculation methods of consolidating rural residen
期刊信息
位置：