微咸水隔沟交替灌溉的水盐分布规律及作物响应机理

The use of brackish water irrigation can ease the shortage of fresh water crisis, but if the improper irrigation management measures, cause the accumulation of salt ions in the soil, reduce soil permeability and tilth, will lead to serious soil secondary salinization and on the environment caused by adverse effects. Alternate irrigation patterns can change the distribution of soil salinity, increase water infiltration, has become an important research direction of controlling salt and brackish water irrigation area. This project through the study of different salt water (salinity) water alternate irrigation treatment caused uneven distribution, to explore the root zone soil salinity of uneven distribution of root distribution, growth and development index, physiological indicators, as well as the yield and quality of the effect of, clarify the salt uneven distribution of plant stress mechanism. Based on part of the root system by the water salt stress can produce a good compensation effect mechanism, determine crop suitable under salt stress root accounted for the proportion of total root, for rate set of brackish water irrigation area specific practical irrigation methods provide data and theoretical support.

利用微咸水灌溉可以缓解淡水缺乏的危机，但如果灌溉管理措施不当，会导致盐分离子在土壤中积累，降低土壤的渗透性和可耕性，严重时会导致土壤次生盐碱化并对环境造成不良影响。交替灌溉的方式可以改变土壤盐分分布，增加水分入渗作用，已成为微咸水灌溉地区一个重要的控盐研究方向。本项目通过研究不同（含盐量）水分交替灌溉处理造成的水盐不均匀分布情况，探索根区土壤盐分的不均匀分布对根系分布、生长发育指标、生理（化）指标、以及产量和品质的影响规律，阐明盐分不均匀分布对植物产生胁迫的机理。基于部分根系受到水盐胁迫能够产生有益补偿效应的机理，确定作物适宜的受盐分胁迫根系占总根系的比例，为率定出微咸水灌溉地区特定的实用灌溉方式提供数据和理论支持。

利用微咸水灌溉可以缓解淡水缺乏的危机，但如果灌溉管理措施不当，会导致盐分离子在土壤中积累，降低土壤的渗透性和可耕性，严重时会导致土壤次生盐碱化并对环境造成不良影响。交替灌溉的方式可以改变土壤盐分分布，增加水分入渗作用，已成为微咸水灌溉地区一个重要的控盐研究方向。本项目通过研究不同（含盐量）水分交替灌溉处理造成的水盐不均匀分布情况，探索根区土壤盐分的不均匀分布对根系分布、生长发育指标、生理（化）指标、以及产量和品质的影响规律，阐明盐分不均匀分布对植物产生胁迫的机理，为率定出微咸水灌溉地区特定的实用灌溉方式提供数据和理论支持。本项目执行期间，在Plant Soil and Environment、水资源与水工程学报等国内外期刊上发表论文6篇，其中SCI收录1篇。在国际学术会议上做报告1次，国内学术会议上作报告1次；培养博士研究生1名，硕士研究生2名。