基于大田土壤水文特性计算解除旱情需水量研究  

Calculating water requirement for drought relief based on soil hydrological characteristics of field

作　　者：赵军 代璐璐 赵红艳 ZHAO Jun;DAI Lulu;ZHAO Hongyan(Meteorological Bureau of Fuxin Mongolian Autonomous County,Fuxin Liaoning 123100,China)

机构地区：[1]阜新市阜新蒙古族自治县气象局,辽宁阜新123100

出　　处：《农业工程》2024年第9期147-153,共7页AGRICULTURAL ENGINEERING

摘　　要：阜新市阜新蒙古族自治县(简称阜新县)为辽宁省的农业大县,受所在的气候区和地理位置影响,阜新县多旱情发生,春季旱情尤为频发。为能更好地做好精细化服务,测定大田土壤水文特性(常数),结合阜新市《气象干旱定义与分级》标准,计算得到各层次(10~20、10~50 cm)旱情解除所需降水量的理论下限值、各层次试验作物(玉米、大豆)解除凋萎旱情所需降水量的理论下限值、试验区和两个对比试验区的气象干旱标准的相对湿度表示形式。结果表明,对于不同种类和相同种类不同品种的作物,解除凋萎旱情所需的水量不同。试验对阜新县大田作物抗旱精细化研究提供了一定的科学依据。As a major agricultural county in Liaoning Province,Fuxin Mongolian Autonomous County is prone to drought,especially in spring,because of climate type and geographical location.In order to better serve refinement of agriculture,by measuring hydrological characteristics(constants)of field soil and referring to standard"Definition and Grading of Meteorological Drought"in Fuxin City,theoretical lower limit of precipitation required to relieve drought conditions at each level(10 to 20,10 to 50 cm),theoretical lower limit of precipitation required to relieve wilting drought conditions for experimental crops(corn,soybeans)at each level,and relative humidity representation of meteorological drought standards for experimental area and two comparative experimental areas,were calculated.Results indicated that amount of water needed to relieve withering drought varied depending on crop species and varieties.Experiment provided a scientific basis for research on drought resistance of field crops in Fuxin County.

关 键 词：大田土壤水文特性 干旱 凋萎湿度 土壤墒情 阜新县 

分 类 号：S152.7[农业科学—土壤学]