摘要
为揭示陕北山地果园水分分布及运移规律,以陕北山地苹果园为研究对象,探究不同生育期土壤饱和导水率(K_(s))和植物导水率(K_(p))特征,分析土壤理化性质对其的影响。结果表明:①土壤饱和导水率在成熟期最高,为0.86 mm/min;幼果期、着色期和开花期土壤导水率次之,分别为0.77、0.72、0.65 mm/min;果实膨大期土壤饱和导水率最低为0.47 mm/min。②植物导水率在不同生育期表现为开花期>着色期>幼果期>成熟期>果实膨大期,它们的植物导水率分别为8.25×10^(-5)、6.12×10^(-5)、4.25×10^(-5)、3.38×10^(-5)、3.34×10^(-5)kg/(s·MPa)。③多元逐步回归分析得到K_(s)与K_(p)的传递函数,并对其进行检验发现预测值与实测值相差不大,R^(2)均在0.9左右,能较为准确地预测K_(s)与K_(p),建立的函数模型状况良好;④通径分析可知有机质含量对土壤饱和导水率和植物导水率都有直接正效应,粉粒含量对土壤饱和导水率有间接正效应。
The objective of this study was to understand the patterns of water distribution and transport in orchards in mountainous areas of northern Shaanxi.The characteristics of soil saturated water conductivity(K_(s))and plant water conductivity(K_(p))at different growth stages of mountain apple orchard located in in Northern Shaanxi was investigaged.The effects of soil physical and chemical properties on them were analyzed.The results showed that:①the maximum saturated water conductivity was 0.86 mm/min at mature stage;the soil water conductivity was 0.77 mm/min,0.72 mm/min and 0.65 mm/min at young fruit stage,coloring stage and flowering stage,respectively.The minimum saturated water conductivity was 0.47 mm/min at fruit expansion stage.②Plant water conductivity varied across growth stages,with values of 8.25×10^(-5),6.12×10^(-5),4.25×10^(-5),3.38×10^(-5),3.34×10^(-5)kg/(s·MPa)for the flowering stage,coloring stage,young fruit stage,mature stage,and fruit expansion stage,respectively.③Multiple stepwise regression analysis yielded a transfer function for K s(soil saturated water conductivity)and K p(plant water conductivity),with the predicted values closely matching the measured values(R^(2)≈0.9).This function model proved accurate in predicting K_(s)and K_(p).④Path analysis showed that organic matter content directly and positively influenced soil saturated water conductivity and plant water conductivity,while silt content indirectly and positively affected soil saturated water conductivity.
作者
魏瑶瑶
郑恩
高铭雨
刘敏
王俊
张永旺
WEI Yaoyao;ZHENG En;GAO Mingyu;LIU Min;WANG Jun;ZHANG Yongwang(College of Life Sciences,Yan’an University,Yan’an Shaanxi 716000,China;Shaanxi Provincial Key Laboratory of Jujube(Yan’an University),Yan’an,Shaanxi 716000,China)
出处
《西北农业学报》
CAS
CSCD
北大核心
2023年第11期1813-1820,共8页
Acta Agriculturae Boreali-occidentalis Sinica
基金
国家自然科学基金(41807520)
延安大学科研项目(YDQ2018-21)
博士科研启动项目(YDBK2017-25)
创新能力支撑计划(2020KJXX-009)。
关键词
山地苹果园
不同生育期
土壤饱和导水率
植物导水率
Mountain apple orchard
Different growth periods
Soil saturated water conductivity
Plant water conductivity
