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滴灌灌水下限对夹砂层农田土壤水盐分布和玉米生长的影响
引用本文:丁运韬,程 煜,张体彬,姬祥祥,董勤各,冯 浩,张相柱. 滴灌灌水下限对夹砂层农田土壤水盐分布和玉米生长的影响[J]. 土壤学报, 2022, 59(2)
作者姓名:丁运韬  程 煜  张体彬  姬祥祥  董勤各  冯 浩  张相柱
作者单位:西北农林科技大学旱区农业水土工程教育部重点实验室,西北农林科技大学旱区农业水土工程教育部重点实验室,西北农林科技大学旱区农业水土工程教育部重点实验室,西北农林科技大学旱区农业水土工程教育部重点实验室,西北农林科技大学旱区农业水土工程教育部重点实验室,西北农林科技大学旱区农业水土工程教育部重点实验室,巴彦淖尔市水利科学研究所
基金项目:国家重点研发计划项目(2017YFC0403303)、国家自然科学基金项目(51879224,51509238)和陕西省重点研发计划一般项目(2019NY-001)
摘    要:为探明滴灌灌水下限对夹砂层土壤水盐分布和作物生长的影响,在河套灌区开展连续2年的田间试验。供试土壤60~100 cm深度为砂土层,供试作物为玉米。基于土壤基质势,设置5个滴灌灌水下限:-10 kPa(S1),-20 kPa(S2),-30 kPa(S3),-40 kPa(S4)和-50 kPa(S5)。结果表明夹砂层显著影响土壤水盐运移。0~60 cm根层含水量较低,而砂层较高;土壤盐分受水分影响,更多聚集在砂层。灌水下限显著影响土壤水盐分布和各层储量,下限越高,根层土壤含水量越高、含盐量越低,而砂层及以下处理间差异不显著。S1、S2和S3处理玉米籽粒产量显著高于S4和S5(P < 0.05),且前三者之间差异不显著,S3水分利用效率最高。因此,针对河套灌区夹砂层农田,建议膜下滴灌灌水下限为-30 kPa。

关 键 词:夹砂层;土壤水势;膜下滴灌;根区水盐环境;水分利用效率
收稿时间:2020-06-28
修稿时间:2021-01-11

Effects of Different Thresholds of Mulched Drip Irrigation on Water and Salt Distribution and Water Use Efficiency of Maize in A Sand-Layered Soil
Affiliation:Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling,Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling,Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling,Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling,Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling,Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling,Water Conservancy Research Institute of Bayannur City, Linhe
Abstract:
Keywords:Sand-layered soil   Soil matric potential   Mulched drip irrigation   Water and salt environment in the root layer   Water use efficiency
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