晚霜冻害对黄土区苹果树水分利用能力的影响
Effects of Late Frost Damage on Water Use of Apple Trees in Loess Plateau Area
投稿时间:2019-03-18  修订日期:2019-04-18
DOI:
中文关键词:  霜冻  液流速率  大气水分亏缺  太净辐射  苹果树  黄土高原
英文关键词:frost  sap flux density  vapor pressure deficit  solar net radiation  apple trees  the Loess plateau
基金项目:国家重点基础研究发展计划
作者单位E-mail
党宏忠 中国林业科学研究院荒漠化研究所 hzdang@caf.ac.cn 
冯金超 中国林业科学研究院荒漠化研究所  
却晓娥 中国林业科学研究院荒漠化研究所  
王檬檬 内蒙古农业大学沙漠治理学院  
张金鑫 中国林业科学研究院林业研究所  
摘要点击次数: 89
全文下载次数: 0
中文摘要:
      [目的]通过对比研究,明确(晚)霜冻害对苹果树生长季水分利用能力影响的程度与机理。[方法]利用热扩散技术(TDP)对黄土区苹果树未霜冻年、霜冻年主要生长季边材液流速率(Js)开展连续监测,并同步观测净辐射(Rn)等气象因子,计算大气水分亏缺(VPD)等变量。通过对比、相关分析阐明晚霜冻害对苹果树水分利用能力的影响。[结果] 霜冻发生后,当日午间液流速率最大值(Js-max)比霜冻前数日内的最大值降低9%~27%,苹果树水分利用能力(Js-max / VPD)在霜冻后的数日内连续下降。霜冻后当年(2018)生长季平均液流速率比未霜冻年(2017)同期下降35%。在整个主要生长季内,液流速率日平均值(Js-mean)与Rn、VPD均具有显著的指数关系,但在相同的Rn或VPD水平下,霜冻年的Js-mean显著低于未霜冻年。[结论] 严重低温霜冻和霜冻后快速升温共同导致了苹果树生长季水分利用能力的显著下降。研究结果为认识霜冻对苹果树水分生理的影响机制提供了理论支撑。
英文摘要:
      [Objective] To determine the degree and mechanism of frost damage on water use in growing season of apple tree by comparison.[Methods]Thermal dissipation probe (TDP) was used to carry out continuous monitoring of sap flux density (Js) of apple trees during the main growing seasons in two years, before and after the frost. The micro-meteorological factors such as net radiation (Rn) was measured synchronously and derived variables such as vapour pressure deficit (VPD) was calculated. The effects of late frost damage on water use of apple trees were analyzed.[Results]. Compared with the days before frost, the maximum sap flux density (Js-max) around noon on the day of frost occured decreased by 9%~27%, and Js-max/VPD decreased continuously in the days after frost. By comparison,The average daily sap flux density (Js-mean) in the growth season of frost year (2018) was 35% lower than that in the non-frost year (2017). In the whole main growth season, Js-mean has a significant exponential relationship with Rn or VPD, but at the same level of Rn (or VPD), the Js-mean of frost-year is significantly lower than that of non-frost-year.[Conclusion]The severe low temperature frost and rapid rise of air temperature after frost combined to cause a significant decline in water use ability of apple trees during the growing season. The results provide support for understanding the mechanism of frost's influence on water physiology of apple trees.
  查看/发表评论  下载PDF阅读器
关闭
京ICP备09064894号-3
版权所有:《林业科学研究》编辑部
地址:北京颐和园后中国林科院林业所 电话:010-62889680 E-mail:lykxyj@vip.163.com
技术支持:北京勤云科技发展有限公司
function PdfOpen(url){ var win="toolbar=no,location=no,directories=no,status=yes,menubar=yes,scrollbars=yes,resizable=yes"; window.open(url,"",win); } function openWin(url,w,h){ var win="toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=" + w + ",height=" + h; controlWindow=window.open(url,"",win); } &et=970261AF74811A5D7BA0F898133A3EB5293C3D7F63FFE2319FD1AD2360AD8A284EDA3C8729DD487C5FC1C64D34A1913B3A83195FF4D24377825E227772DCEFFBFA8F1F53FE65AAE53C74662E4B1B49BF&pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=336C48A7E1AE975A&jid=578555B7B1AAB8ED64366E0DF87B2222&yid=B6351343F4791CA3&aid=&vid=&iid=E158A972A605785F&sid=&eid=&fileno=201903180000001&flag=2&is_more=0"> var my_pcid="03F54A49DE00578AA0E5DDF5BC021AA7"; var my_cid="336C48A7E1AE975A"; var my_jid="578555B7B1AAB8ED64366E0DF87B2222"; var my_yid="B6351343F4791CA3"; var my_aid="";