冬灌结合少量春灌条件下南疆棉田休闲期适宜冬灌定额研究

【目的】探究冬灌结合少量春灌条件下南疆棉田休闲期土壤水盐运移规律,确定冬灌结合春灌条件下的适宜冬灌定额。【方法】基于田间试验,监测不同时期0~100 cm土层水、盐指标,探讨不同冬灌(0、600、1 200、1 800、2 400、3 000、3 600 m3/hm2)结合少量春灌(300 m3/hm2)对南疆棉田休闲期土壤水盐运移及盐分淋洗效率的影响。【结果】①冬灌具有一定的储水效应,冬灌初期各处理土壤含水率均大幅度增加,0~30 cm土层含水率的整体增幅最大;春灌前,各处理土壤含水率均大幅度下降,其中冬灌600 m3/hm2及未冬灌处理0~100 cm土层含水率低于冬灌前;补充春灌后,对于...

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Published inGuanʻgai paishui xuebao Vol. 41; no. 12; pp. 10 - 17
Main Authors LI, Yong, LI, Lin, WANG, Feng, LIU, Liang, LUO Xijuan, WANG Xingpeng
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 01.12.2022
塔里木大学水利与建筑工程学院,新疆阿拉尔 843300%中国农业科学院农田灌溉研究所/ 农业农村部作物需水与调控重点开放实验室,河南新乡 453002
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ISSN1672-3317
DOI10.13522/j.cnki.ggps.2022198

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Abstract 【目的】探究冬灌结合少量春灌条件下南疆棉田休闲期土壤水盐运移规律,确定冬灌结合春灌条件下的适宜冬灌定额。【方法】基于田间试验,监测不同时期0~100 cm土层水、盐指标,探讨不同冬灌(0、600、1 200、1 800、2 400、3 000、3 600 m3/hm2)结合少量春灌(300 m3/hm2)对南疆棉田休闲期土壤水盐运移及盐分淋洗效率的影响。【结果】①冬灌具有一定的储水效应,冬灌初期各处理土壤含水率均大幅度增加,0~30 cm土层含水率的整体增幅最大;春灌前,各处理土壤含水率均大幅度下降,其中冬灌600 m3/hm2及未冬灌处理0~100 cm土层含水率低于冬灌前;补充春灌后,对于冬灌定额达1 800 m3/hm2及以上的处理,0~30 cm土层平均质量含水率均在15.66%以上。②水是盐分运移的载体,冬灌初期土壤盐分有效淋洗深度随冬灌定额的升高而逐渐增大,当冬灌水量达到2 400 m3/hm2时,盐分有效淋洗深度可达100 cm;春灌前,经过长期的休闲期土壤蒸发,各处理均出现不同程度的返盐现象,其中未冬灌处理土壤表层返盐最为剧烈;补充春灌300 m3/hm2后,各处理土壤剖面盐分得到再次淋洗,0~30 cm土层含盐量整体降幅较大。③经历整个休闲期后,0~30 cm和0~100 cm土层平均脱盐率均以冬灌2 400 m3/hm2结合春灌300 m3/hm2处理为最高。④春灌后,冬灌2 400 m3/hm2结合春灌300 m3/hm2处理0~30 cm土层平均电导率为1.40 mS/cm,0~10 cm土层电导率为1.30 mS/cm,对应全盐量分别为3.65、3.32 g/kg,低于棉花出苗盐分适宜值(3.7 g/kg)。【结论】综合考虑节水、脱盐效应以及春灌后0~30 cm土层土壤含水率和含盐量,灌水定额2 400 m3/hm2是本地区冬灌结合少量春灌(300 m3/hm2)条件下的最优冬灌定额。
AbstractList 【目的】探究冬灌结合少量春灌条件下南疆棉田休闲期土壤水盐运移规律,确定冬灌结合春灌条件下的适宜冬灌定额。【方法】基于田间试验,监测不同时期0~100 cm土层水、盐指标,探讨不同冬灌(0、600、1 200、1 800、2 400、3 000、3 600 m3/hm2)结合少量春灌(300 m3/hm2)对南疆棉田休闲期土壤水盐运移及盐分淋洗效率的影响。【结果】①冬灌具有一定的储水效应,冬灌初期各处理土壤含水率均大幅度增加,0~30 cm土层含水率的整体增幅最大;春灌前,各处理土壤含水率均大幅度下降,其中冬灌600 m3/hm2及未冬灌处理0~100 cm土层含水率低于冬灌前;补充春灌后,对于冬灌定额达1 800 m3/hm2及以上的处理,0~30 cm土层平均质量含水率均在15.66%以上。②水是盐分运移的载体,冬灌初期土壤盐分有效淋洗深度随冬灌定额的升高而逐渐增大,当冬灌水量达到2 400 m3/hm2时,盐分有效淋洗深度可达100 cm;春灌前,经过长期的休闲期土壤蒸发,各处理均出现不同程度的返盐现象,其中未冬灌处理土壤表层返盐最为剧烈;补充春灌300 m3/hm2后,各处理土壤剖面盐分得到再次淋洗,0~30 cm土层含盐量整体降幅较大。③经历整个休闲期后,0~30 cm和0~100 cm土层平均脱盐率均以冬灌2 400 m3/hm2结合春灌300 m3/hm2处理为最高。④春灌后,冬灌2 400 m3/hm2结合春灌300 m3/hm2处理0~30 cm土层平均电导率为1.40 mS/cm,0~10 cm土层电导率为1.30 mS/cm,对应全盐量分别为3.65、3.32 g/kg,低于棉花出苗盐分适宜值(3.7 g/kg)。【结论】综合考虑节水、脱盐效应以及春灌后0~30 cm土层土壤含水率和含盐量,灌水定额2 400 m3/hm2是本地区冬灌结合少量春灌(300 m3/hm2)条件下的最优冬灌定额。
S152.72; [目的]探究冬灌结合少量春灌条件下南疆棉田休闲期土壤水盐运移规律,确定冬灌结合春灌条件下的适宜冬灌定额.[方法]基于田间试验,监测不同时期0~100 cm土层水、盐指标,探讨不同冬灌(0、600、1200、1800、2400、3000、3600 m3/hm2)结合少量春灌(300 m3/hm2)对南疆棉田休闲期土壤水盐运移及盐分淋洗效率的影响.[结果]①冬灌具有一定的储水效应,冬灌初期各处理土壤含水率均大幅度增加,0~30 cm土层含水率的整体增幅最大;春灌前,各处理土壤含水率均大幅度下降,其中冬灌600 m3/hm2及未冬灌处理0~100 cm土层含水率低于冬灌前;补充春灌后,对于冬灌定额达1800 m3/hm2及以上的处理,0~30 cm土层平均质量含水率均在15.66%以上.②水是盐分运移的载体,冬灌初期土壤盐分有效淋洗深度随冬灌定额的升高而逐渐增大,当冬灌水量达到2400 m3/hm2时,盐分有效淋洗深度可达100 cm;春灌前,经过长期的休闲期土壤蒸发,各处理均出现不同程度的返盐现象,其中未冬灌处理土壤表层返盐最为剧烈;补充春灌300 m3/hm2后,各处理土壤剖面盐分得到再次淋洗,0~30 cm土层含盐量整体降幅较大.③经历整个休闲期后,0~30 cm和0~100 cm土层平均脱盐率均以冬灌2400 m3/hm2结合春灌300 m3/hm2处理为最高.④春灌后,冬灌2400 m3/hm2结合春灌300 m3/hm2处理0~30 cm土层平均电导率为1.40 mS/cm,0~10 cm土层电导率为1.30 mS/cm,对应全盐量分别为3.65、3.32 g/kg,低于棉花出苗盐分适宜值(3.7 g/kg).[结论]综合考虑节水、脱盐效应以及春灌后0~30 cm土层土壤含水率和含盐量,灌水定额2400 m3/hm2是本地区冬灌结合少量春灌(300m3/hm2)条件下的最优冬灌定额.
Author LI, Yong
WANG Xingpeng
WANG, Feng
LIU, Liang
LUO Xijuan
LI, Lin
AuthorAffiliation 塔里木大学水利与建筑工程学院,新疆阿拉尔 843300%中国农业科学院农田灌溉研究所/ 农业农村部作物需水与调控重点开放实验室,河南新乡 453002
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盐分淋洗
冬灌定额
冬灌
春灌
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塔里木大学水利与建筑工程学院,新疆阿拉尔 843300%中国农业科学院农田灌溉研究所/ 农业农村部作物需水与调控重点开放实验室,河南新乡 453002
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Snippet 【目的】探究冬灌结合少量春灌条件下南疆棉田休闲期土壤水盐运移规律,确定冬灌结合春灌条件下的适宜冬灌定额。【方法】基于田间试验,监测不同时期0~100 cm土层水、盐指标,探讨不同冬灌(0、600、1 200、1 800、2 400、3 000、3 600 m3/hm2)结合少量春灌(300...
S152.72; [目的]探究冬灌结合少量春灌条件下南疆棉田休闲期土壤水盐运移规律,确定冬灌结合春灌条件下的适宜冬灌定额.[方法]基于田间试验,监测不同时期0~100 cm土层水、盐指标,探讨不同冬灌(0、600、1200、1800、2400、3000、3600 m3/hm2)结合少量春灌(300...
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SubjectTerms Agricultural production
Cotton
Desalination
Electrical resistivity
Irrigation
Irrigation efficiency
Irrigation scheduling
Irrigation water
Leaching
Moisture content
Production scheduling
Root zone
Salinity
Salinity effects
Salts
Soil depth
Soil layers
Soil moisture
Soil salinity
Soil water
Soil water storage
Spring
Spring (season)
Water conservation
Water content
Water storage
Winter
Title 冬灌结合少量春灌条件下南疆棉田休闲期适宜冬灌定额研究
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