| 王春霞,王全九,刘建军,张明,庄亮,潘洪彬.微咸水滴灌条件下土壤水盐分布特征试验研究[J].干旱地区农业研究,2010,28(6):30~35 |
| 微咸水滴灌条件下土壤水盐分布特征试验研究 |
| Trial studies on characteristics of soil water and salt distribution in brackish water drip irrigation |
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| DOI：10.7606/j.issn.1000-7601.2010.06.06 |
| 中文关键词: 微咸水滴灌 灌水水质 灌水量 脱盐系数 |
| 英文关键词:brackish water irrigation irrigation water quality irrigation volume desalinizaion coefficient |
| 基金项目:国家科技支撑计划课题“干旱区膜下滴灌农田盐分调控与微咸水利用技术研究”(2007BAD38B01)；新疆自治区重大科技专项课题(20073117-1)；国家自然科学基金项目(50879067)；陕西省重点学科建设专项资金资助项目 |
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| 中文摘要: |
| 为了研究微咸水水质及灌水量对当地土壤水盐运移的影响,充分利用新疆库尔勒水管处重点灌溉实验站的水质,进行了棉田不同灌水矿化度(0.74、2.65、3.5、4.41 g/L)及灌水量(6、8、10 L)下滴灌入渗试验,着重分析了淡水(矿化度0.74 g/L)和3.5 g/L矿化度微咸水及不同灌水量下的湿润体内的水盐分布特征。结果表明:微咸水可以增加土壤水平方向含水量,但脱盐效果低于淡水滴灌条件;3.5 g/L微咸水滴灌在0~40 cm垂直土层盐分均值比平均初始值稍有增加,而10~40 cm土层内没有盐分积累,可满足耕作层内棉花的生长;由试验灌水量折合成灌水定额为23 m3/667m2,所以在当地土质下采用3.5 g/L微咸水进行膜下滴灌在≥23 m3/667m2灌水定额下可行;微咸水滴头正下方纵向的脱盐系数随灌水量的增加而增加,两者呈直线关系,由该关系式可大致推求一定脱盐系数下的灌水量。 |
| 英文摘要: |
| To find out the effect of brackish water quality and imigation volume on the distribution of water and salt
in soil and make full use of brackish water in irrigation, an experiment of drip irrigation was conducted with different
brackish water quality (0.74, 2.65, 3.5 g/L and4.41 g/L) and different irrigation volume (6, 8 L and 10 L), and an
analysis was made of the characteristics of soil water and salt distribution in wetness body of freshwater and 3.5 g/L
brackish water under different irrigation volume. The results indicate that brackish water may increase horizontal soil wa-ter content, but its desalinizaion effect is lower than that of freshwater; The average salinity in 0~40 cm layer is more than that of the initial amount, while there is no salt cumulation in 10~40 cm layer, which can fit the cotton growth; The imigation water ration is 23 m3/mu in the test, so it is feasible to adopt a ration of≥23 m3/mu 3.5 g/L brackish water in the condition of local soil quality; The vertical desalinizaion coefficient increases with irrigation volume augment and their relation assumes linearity, so the irrigation volume may be ascertained through desalinizaion cefficient by using this formula. |
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