论文部分内容阅读
环渤海滨海地区土地盐碱、淡水资源紧缺,严重制约区域经济持续快速发展。非常规海冰水资源利用的深入研究为盐碱地改造、粮食稳产丰产提供了新途径。本文利用HYDRUS数值模拟的方法对3g/L海冰水灌溉进行模型模拟与验证,验证结果表明模型具有较好的可靠性;选择春季作物需水关键期141d为情景灌溉日,灌溉量采用0m3/hm2、300m3/hm2、600m3/hm2、1200m3/hm2、1800m3/hm2,分析表明:海冰水灌溉量为1200m3/hm2时耕层土壤水分含量达到饱和,耕层盐分含量不再会随灌溉量的增加而增加,海冰水灌溉量≥1800m3/hm2时,部分盐分可淋洗到1m层以下。本文旨在利用数值分析方法揭示研究区春季海冰水农业利用在灌溉量上的关键性技术,以期为科学合理的利用海冰水资源提供参考。
The coastal areas around the Bohai Sea, the salinization of land, fresh water shortage, seriously hampered the sustained and rapid development of regional economy. In-depth study on the utilization of unconventional sea ice has provided a new way for the salvage of saline-alkali land and the steady and high yield of grain. In this paper, HYDRUS numerical simulation is used to simulate and verify the 3g / L sea ice water irrigation. The results show that the model has good reliability. The critical period of spring water requirement for crop is 141d as the scene irrigation day, and the irrigation volume is 0m3 / hm2, 300m3 / hm2, 600m3 / hm2, 1200m3 / hm2, 1800m3 / hm2. The results showed that when the sea ice water irrigation volume was 1200m3 / hm2, the soil moisture content in the topsoil reached saturation, and the salt content in the topsoil no longer increased with the irrigation volume However, when the amount of sea ice water irrigation is more than 1800m3 / hm2, part of the salt can be rinsed below 1m. The purpose of this paper is to use numerical analysis to reveal the key technologies of spring sea ice water and agricultural utilization in irrigation area in the study area in order to provide a reference for scientific and rational utilization of sea ice water resources.