水土保持通报2024，Vol.44Issue(3)：16-25,10.DOI:10.13961/j.cnki.stbctb.2024.03.003
不同灌溉方式和灌水量对土壤水盐及燕麦生长特征的影响
Effects of Different Irrigation Methods and Irrigation Amounts on Soil Water and Salt,and Oat Growth Characteristics
摘要
Abstract
[Objective]The effects of different irrigation methods and irrigation amounts on soil water,soil salt changes,and oat growth characteristics were explored to provide a scientific reference for improving crop production efficiency and soil water management in saline-alkali land.[Methods]Pot experiments were conducted with three irrigation treatments:conventional irrigation,fixed unilateral root-zone irrigation(FURI),and alternate partial root-zone irrigation(APRI).Three irrigation amounts were evaluated:W1(60％ θf-70％ θf,θf is field water-holding capacity),W2(70％ θf-80％ θf),and W3(80％ θf-90％ θf).Conventional irrigation was used as the control.Therefore,there were a total of nine treatment combinations.[Results]① Under the different irrigation treatments,the change trend of water content in each soil layer was basically the same.As irrigation amount increased,the effect of salt leaching was more significant.The deep water content of conventional irrigation was generally higher than that of the other two irrigation treatments.② Plant height,relative chlorophyll content of leaves,and oat quality increased with increasiong irrigation amount.The contents of crude fat,crude protein,and β-glucan in oat were 7.02％,3.76％,and 6.06％,respectively,greater under the W2 irrigation level than under the conventional irrigation level,but the SPAD values of oat leaves were lower under W2,which affected the photosynthetic capacity of oat.③ Soil salinity showed different degrees of accumulation as oat growth progressed,and the salt accumulation rate with alternate partial root-zone irrigation was the lowest.At the same time,soil salinity had a significant effect on oat root growth,water use efficiency,and yield.Total root length,total root surface area,and total root volume increased by 6.75％,6.92％,and 12.5％,respectively.Water use efficiency increased by 17.32％compared with conventional irrigation with the same irrigation amount(W2).[Conclusion]The medium irrigation amount(W2)under alternate partial root-zone irrigation was beneficial for improving the production efficiency of oat and was better at controlling salt accumulation.关键词
分根交替灌溉/土壤水盐/燕麦/水分利用效率/品质Key words
alternate partial root-zone irrigation/soil water and salt/oat/water use efficiency/quality分类
农业科技引用本文复制引用
赵文举,张雪儿,李建承,俞海英..不同灌溉方式和灌水量对土壤水盐及燕麦生长特征的影响[J].水土保持通报,2024,44(3):16-25,10.基金项目
国家自然科学基金面上项目"河西绿洲灌区多源遥感的土壤水盐演变机理与反演模型研究"(52379042) （52379042）
甘肃省东西协作专项(23CXNA0025) （23CXNA0025）
甘肃省重点研发计划项目"兰白经济区暴雨山洪灾害风险识别与预警技术研发与示范"(23YFFA0019) （23YFFA0019）
