基于茎直径微变化的梨枣灌溉指标的初步研究

CORC > 水土保持研究所 > 中国科学院水利部水土保持研究所 > 水保所知识产出(1956-2013)

	基于茎直径微变化的梨枣灌溉指标的初步研究
	韩立新 ; 汪有科 ; 李晓彬
刊名	园艺学报
	2012
卷号	39 期号:03 页码:552-560
关键词	梨枣 pear-jujube 茎直径微变化 trunk diameter fluctuation 土壤水势 soil water potential 信号强度 signal intensity 水分亏缺 water stress
其他题名	Rational Indicators for Irrigation Scheduling of Pear-jujube Based on
中文摘要	研究了4年生酸枣砧梨枣(Ziziphus jujuba Mill.)植株主干茎直径微变化指标对土壤水势(SWP)变化的响应规律,以及与气象要素的关系。结果表明:土壤水势降低引起茎直径日最大收缩量(MDS)增大,日生长量(DG)、生长速率(TGR)和日最大值(MXTD)降低。在水分亏缺发展阶段和水分亏缺维持阶段,MDS和TGR的噪声信号(变异系数)较小,信号强度与噪声信号的比值较大,表明其对土壤水势变化反映敏感。此外,MDS、TGR与潜在蒸散量(ET0)、正午水汽压亏缺(VPDmd)等气象因子的相关性显著,均能反映大气的干旱程度,因此TGR和MDS可作为梨枣水分亏缺的诊断指标。
英文摘要	We used four-year old pear-jujube（Ziziphus jujuba Mill.）trees grafted on wild jujube[Ziziphus jujuba Mill. var. spinosa（Bunge）Hu ex H. F. Chow]to study the response of parameters derived from trunk diameter fluctuations（TDF）to soil water potential（SWP）. The relationship among these parameters and meteorological factors were also studied to identify suitable indicators for precise irrigation scheduling of pear-jujube. The maximum daily shrinkage（MDS）increased，whereas the daily growth（DG），trunk growth rate（TGR），and maximum daily trunk diameter（MXTD）decreased，as the SWP decreased. The responses of the four indicators to SWP change were significantly（P < 0.05） different. MDS and TGR noise was lower during the stages of water stress development and water stress maintenance，whereas the ratios of signal intensity to noise were higher. MDS and TGR also had significant relationships with potential evapotranspiration（ET0）and noon vapor pressure deficit（VPDmd）， which could indicate atmospheric drought conditions. Therefore，MDS and TGR may provide appropriate indicators for diagnose pear-jujube water content.
语种	中文
公开日期	2014-06-30
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/5363]
专题	水土保持研究所_水保所知识产出(1956-2013)
推荐引用方式 GB/T 7714	韩立新,汪有科,李晓彬. 基于茎直径微变化的梨枣灌溉指标的初步研究[J]. 园艺学报,2012,39(03):552-560.
APA	韩立新,汪有科,&李晓彬.(2012).基于茎直径微变化的梨枣灌溉指标的初步研究.园艺学报,39(03),552-560.
MLA	韩立新,et al."基于茎直径微变化的梨枣灌溉指标的初步研究".园艺学报 39.03(2012):552-560.