基于称重式蒸渗仪的春玉米蒸散量研究

【目的】分析春玉米蒸散变化规律及建立产量与水分的关系,为山西省春玉米灌溉需水量的精准调控提供依据。【方法】利用山西省中心灌溉试验站称重式蒸渗仪在2019—2020年春玉米不同供水量条件下的蒸散发测定试验,共设置4个处理,分别为T1(5水)、T2(6水)、T3(4水)、T4处理(2水),按照作物需水量确定灌水时间,灌水定额均为60 mm,每个处理配置1套称重式蒸渗仪,自动记录逐时土体水质量。利用水量平衡方法计算逐日蒸散量,分析蒸散变化规律,并利用相对腾发量为自变量的过程模型,建立产量与蒸散量之间的关系。【结果】发育中期日蒸散强度较其他生育阶段蒸散强度大,受灌水的影响,灌溉定额越大,不同生育阶段的...

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Published inGuanʻgai paishui xuebao Vol. 40; no. 11; pp. 17 - 25
Main Authors ZHANG, Baozhu, WANG Yangren, LI, Jinyu
Format Journal Article
LanguageChinese
English
Published Xinxiang City Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage 01.11.2021
天津农学院水利工程学院,天津300392%山西省中心灌溉试验站,山西文水032107
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Abstract 【目的】分析春玉米蒸散变化规律及建立产量与水分的关系,为山西省春玉米灌溉需水量的精准调控提供依据。【方法】利用山西省中心灌溉试验站称重式蒸渗仪在2019—2020年春玉米不同供水量条件下的蒸散发测定试验,共设置4个处理,分别为T1(5水)、T2(6水)、T3(4水)、T4处理(2水),按照作物需水量确定灌水时间,灌水定额均为60 mm,每个处理配置1套称重式蒸渗仪,自动记录逐时土体水质量。利用水量平衡方法计算逐日蒸散量,分析蒸散变化规律,并利用相对腾发量为自变量的过程模型,建立产量与蒸散量之间的关系。【结果】发育中期日蒸散强度较其他生育阶段蒸散强度大,受灌水的影响,灌溉定额越大,不同生育阶段的日蒸散强度普遍增大,T2处理发育中期,13:00蒸散量最大为0.44 mm/h,T4处理发育中期09:00蒸散量最大为0.175 mm/h;灌水也会影响灌后几日蒸散量,灌水越多,蒸散量也越多,累计蒸散量也越大。春玉米生育期内蒸散作用主要集中在发育中期(播后的52~120 d),该时期日最大蒸散量,2019年和2020年分别为10.68 mm/d和7.27 mm/d,相应的蒸散量占全生育期蒸散量比例分别为75.7%和72.9%。以相对腾发量为自变量的过程模型对产量进行了模拟,率定了模型参数,拟合效果很好,相关系数(R2)达到0.99以上,并利用文峪河2018—2020年春玉米的测试资料进行模型参数验证,R2达到0.94以上,表明率定的参数合理。【结论】基于蒸渗仪测定数据能更准确地确定产量与水分关系,此外,利用FAO推荐的作物系数法计算的蒸散量很好地反映了作物的潜在蒸散量。
AbstractList 【目的】分析春玉米蒸散变化规律及建立产量与水分的关系,为山西省春玉米灌溉需水量的精准调控提供依据。【方法】利用山西省中心灌溉试验站称重式蒸渗仪在2019—2020年春玉米不同供水量条件下的蒸散发测定试验,共设置4个处理,分别为T1(5水)、T2(6水)、T3(4水)、T4处理(2水),按照作物需水量确定灌水时间,灌水定额均为60 mm,每个处理配置1套称重式蒸渗仪,自动记录逐时土体水质量。利用水量平衡方法计算逐日蒸散量,分析蒸散变化规律,并利用相对腾发量为自变量的过程模型,建立产量与蒸散量之间的关系。【结果】发育中期日蒸散强度较其他生育阶段蒸散强度大,受灌水的影响,灌溉定额越大,不同生育阶段的日蒸散强度普遍增大,T2处理发育中期,13:00蒸散量最大为0.44 mm/h,T4处理发育中期09:00蒸散量最大为0.175 mm/h;灌水也会影响灌后几日蒸散量,灌水越多,蒸散量也越多,累计蒸散量也越大。春玉米生育期内蒸散作用主要集中在发育中期(播后的52~120 d),该时期日最大蒸散量,2019年和2020年分别为10.68 mm/d和7.27 mm/d,相应的蒸散量占全生育期蒸散量比例分别为75.7%和72.9%。以相对腾发量为自变量的过程模型对产量进行了模拟,率定了模型参数,拟合效果很好,相关系数(R2)达到0.99以上,并利用文峪河2018—2020年春玉米的测试资料进行模型参数验证,R2达到0.94以上,表明率定的参数合理。【结论】基于蒸渗仪测定数据能更准确地确定产量与水分关系,此外,利用FAO推荐的作物系数法计算的蒸散量很好地反映了作物的潜在蒸散量。
S274; [目的]分析春玉米蒸散变化规律及建立产量与水分的关系,为山西省春玉米灌溉需水量的精准调控提供依据.[方法]利用山西省中心灌溉试验站称重式蒸渗仪在2019-2020年春玉米不同供水量条件下的蒸散发测定试验,共设置4个处理,分别为T1(5水)、T2(6水)、T3(4水)、T4处理(2水),按照作物需水量确定灌水时间,灌水定额均为60 mm,每个处理配置1套称重式蒸渗仪,自动记录逐时土体水质量.利用水量平衡方法计算逐日蒸散量,分析蒸散变化规律,并利用相对腾发量为自变量的过程模型,建立产量与蒸散量之间的关系.[结果]发育中期日蒸散强度较其他生育阶段蒸散强度大,受灌水的影响,灌溉定额越大,不同生育阶段的日蒸散强度普遍增大,T2处理发育中期,13:00蒸散量最大为0.44 mm/h,T4处理发育中期09:00蒸散量最大为0.175 mm/h;灌水也会影响灌后几日蒸散量,灌水越多,蒸散量也越多,累计蒸散量也越大.春玉米生育期内蒸散作用主要集中在发育中期(播后的52~120 d),该时期日最大蒸散量,2019年和2020年分别为10.68mm/d和7.27 mm/d,相应的蒸散量占全生育期蒸散量比例分别为75.7%和72.9%.以相对腾发量为自变量的过程模型对产量进行了模拟,率定了模型参数,拟合效果很好,相关系数(R2)达到0.99以上,并利用文峪河2018-2020年眷玉米的测试资料进行模型参数验证,R2达到0.94以上,表明率定的参数合理.[结论]基于蒸渗仪测定数据能更准确地确定产量与水分关系,此外,利用FAO推荐的作物系数法计算的蒸散量很好地反映了作物的潜在蒸散量.
Author WANG Yangren
LI, Jinyu
ZHANG, Baozhu
AuthorAffiliation 天津农学院水利工程学院,天津300392%山西省中心灌溉试验站,山西文水032107
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SubjectTerms Agricultural production
Corn
Correlation coefficient
Correlation coefficients
Crop growth
Crop yield
Crops
Drilling
Evapotranspiration
Growing season
Growth stage
Hydrologic cycle
Irrigation
Irrigation effects
Irrigation scheduling
Irrigation water
Lysimeters
Moisture content
River basins
Seeds
Soil analysis
Soil moisture
Soil water
Spring
Water balance
Water content
Water supply
Water use
Water use efficiency
Weighing
Title 基于称重式蒸渗仪的春玉米蒸散量研究
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