应用生态学报2013，Vol.24Issue(2)：445-450,6.
夜间增温对冬小麦根系生长和土壤养分有效性的影响
Effects of nighttime warming on winter wheat root growth and soil nutrient availability
摘要
Abstract
Climate warming has an obvious asymmetry between day and night, with a greater increment of air temperature at nighttime than at daytime. By adopting passive nighttime warming (PNW) system, a two-year field experiment of nighttime warming was conducted in the main production areas of winter wheat in China ( Shijiazhuang of Hebei Province, Xuzhou of Jiangsu Province , Xuchang of Henan Province, and Zhenjiang of Jiangsu Province) in 2009 and 2010, with the responses of soil pH and available nutrient contents during the whole growth periods and of wheat root characteristics at heading stage determined. As compared with the control ( no nighttime warming) , nighttime warming decreased the soil pH and available nutrient contents significantly, and increased the root dry mass and root/shoot ratio to a certain extent. During the whole growth period of winter wheat, nighttime warming decreased the soil pH in Shijiazhuang, Xuzhou, Xuchang, and Zhenjiang averagely by 0.4%, 0.4%, 0.7%, and 0. 9% , the soil alkaline nitrogen content averagely by 8.1%, 8. 1% , 7.1% , and 6.0% , the soil available phosphorus content averagely by 15.7%, 12. 1%, 19.6%, and 25. 8% , and the soil available potassium content averagely by 11. 5% , 7. 6% , 7. 6% , and 10. 1% , respectively. However, nighttime wanning increased the wheat root dry mass at heading stage in Shijiazhuang, Xuzhou, and Zhenjiang averagely by 31. 5% ,27.0% , and 14. 5% , and the root/shoot ratio at heading stage in Shijiazhuang, Xuchang, and Zhenjiang averagely by 23. 8% , 13.7% and 9.7% , respectively. Our results indicated that nighttime warming could affect the soil nutrient supply and winter wheat growth via affecting the soil chemical properties.关键词
气候变暖/被动式夜间增温/土壤pH值/土壤速效养分/根系/冬小麦Key words
climate warming/ passive nighttime warming (PNW)/ soil pH/ soil available nutrient / root system/ winter wheat分类
农业科技引用本文复制引用
张明乾,陈金,郭嘉,田云录,杨世佳,张丽,杨冰,张卫建..夜间增温对冬小麦根系生长和土壤养分有效性的影响[J].应用生态学报,2013,24(2):445-450,6.基金项目
中央级公益性科研院所基本科研业务费专项基金项目、国家重点基础研究发展计划项目(2010CB951501)和国家"十二五"粮食丰产科技工程项目(2011BAD16B14)资助. （2010CB951501）
