| 引用本文: | 杨泽龙,苗百岭,乌兰,等.河套灌区土壤盐碱化发生气象条件分析[J].灌溉排水学报,2020,(S1):-. |
| YANG Zelong,MIAO Bailing,WU lan,et al.河套灌区土壤盐碱化发生气象条件分析[J].灌溉排水学报,2020,(S1):-. |
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| 摘要: |
| 为探求河套灌区土壤盐碱化气象预测方法,依据“盐随水移”的原理,主要运用内蒙古达拉特旗国家气象观测站2017 -2018年间0-50cm土体土壤水分定点观测日数据以及相应时段的气象观测资料,以方差分析和相关分析方法进行土壤水盐垂直运移气象条件与动力作用分析。结果显示,地温与0-50cm土层土壤含水量变化动态的正相关性极为显著,是土壤水盐垂向蒸散的关键性动力因子。夏秋季持续发生一周以上较为连续的大于40mm的集中性降水是土壤水盐垂向下渗的主要动力因子,土壤盐分将从30 -40cm及其以上的土层淋洗运移到40cm耕作层以下,持续时间为20天左右。 |
| 关键词: 土壤盐碱化;气象动力;蒸散;土壤水分;河套灌区 |
| DOI： |
| 分类号:X16 |
| 基金项目:内蒙古自治区自然科学(2014MS0406) |
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| Analysis of Meteorological Conditions of Soil Salinizational Process in Hetao irrigational area |
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YANG Zelong1, MIAO Bailing2, WU lan2, GONG Hong3, ZHENG Xiaoyan1, WANG Yunbin1, ZHAO Jianjun1
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1.Dalate Banner Meteorological Bureau in Inner Mongolia,Dalate Banner;2.Inner Mongolia Meteorological Institute;3.Inner Mongolia Meteorological Institute,Hohhot
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| Abstract: |
| In order to explore the meteorological prediction method of soil salinization in Hetao irrigational area, we used daily data (from 2017 to 2018) of 0-50cm soil moisture and data of meteorological observation at National Meteorological Observatory of Dalate Banner in Inner Mongolia, and analyzed meteorological conditions and its effects on vertical migration of water and salt in 0-50cm soil with methods of ANOVA and correlation analysis, and with the principle of “salt shifting with water”. The results show that the positive correlation between ground temperature and soil water content in 0-50cm soil layers is extremely significant, and it is the key driving factor for vertical evapotranspiration of soil water. In the summer and autumn, more than one week of continuous concentrated precipitation of 40mm or more than it is the main factor for infiltration of soil water and salt. The salt in soil layer of 30-40 cm or above it will be transferred to the soil layer of 40-50 cm with a duration of about 20 days. |
| Key words: Soil salinization; Meteorological dynamics; Evapotranspiration; Soil moisture; Hetao irrigational area |
