新疆不同水质滴灌施氮措施对土壤盐分及关键离子的影响研究（中国农业工程学会农业水土工程专业委员会第十二届学术研讨会推荐论文）

陈昊; 王军; 马超; 胡海珠; 李久生

引用本文:	陈昊,王军,马超,等.新疆不同水质滴灌施氮措施对土壤盐分及关键离子的影响研究（中国农业工程学会农业水土工程专业委员会第十二届学术研讨会推荐论文）[J].灌溉排水学报,2022,():-.
	ChenHao,WangJun,MaChao,et al.新疆不同水质滴灌施氮措施对土壤盐分及关键离子的影响研究（中国农业工程学会农业水土工程专业委员会第十二届学术研讨会推荐论文）[J].灌溉排水学报,2022,():-.

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新疆不同水质滴灌施氮措施对土壤盐分及关键离子的影响研究（中国农业工程学会农业水土工程专业委员会第十二届学术研讨会推荐论文）
陈昊¹, 王军², 马超², 胡海珠¹, 李久生²
1.内蒙古大学;2.中国水利水电科学研究院

摘要:

【目的】为探明滴灌水质和施氮量对土壤盐分及离子变化的影响机理。【方法】本研究在新疆阿拉尔开展控制性试验，设置三个施氮量水平（255、315与375 kg/hm2）和三个灌水水质(地下水（1.27g/L），微咸水（3.03 g/L）与咸水（5.00 g/L）)。【结果】结果表明，生育期末微咸水与咸水滴灌下土壤总盐与土壤Na+、Ca2+浓度分别比地下水滴灌高14%~78%、42%~197%与58%~253%；土壤钠吸附比（SAR）与可交换性钠百分比（ESP）分别提高5%~109%与48%~90%；较高施氮量（315和375 kg/hm2）能够降低土壤盐分、Na+、Ca2+浓度分别达11%~70%、6%~42%与21%~138%；土壤SAR与ESP分别降低5%~27%与3%~19%。【结论】土壤盐分随滴灌灌溉水矿化度的增加而增加，适当增加施氮量（315 kg/hm2）能够降低土壤含盐量和关键离子含量，缓解土壤盐碱化。

关键词: 滴灌、微咸水、土壤盐碱化、离子、水肥一体化

DOI：

分类号:[J]

基金项目:国家自然科学基金(52179055, 51790513),中国水科院基本科研业务费专项(ID110145B0022021)

Study on the effect of different irrigation water qualities and nitrogenapplications on soil salinity and key ions contents for drip irrigation in Xinjiang

ChenHao¹, WangJun², MaChao², HuHaizhu¹, LiJiusheng²

1.Inner Mongolia University;2.China Institute of Water Resources and Hydropower Research

Abstract:

【Objective】Drip irrigated with brackish water is a way to relieve water shortage for arid regions, especially in Xinjiang. The aim of this study is to investigate the mechanism of water quality and nitrogen application on soil salinity and ionic changes for drip irrigation.【Method】A pot experiment was carried out in Alar, Xinjiang, including three nitrogen application rates (255, 315 and 375 kg/hm2) and three water irrigation qualities (groundwater (1.27 g/L), brackish water (3.03 g/L) and saline water (5.00 g/L)).【Results】The results showed that the total soil salt content, soil sodium and calcium ion concentrations under brackish water and saline water irrigation were greater than those under groundwater irrigation by 14%~78%,42%~197% and 58%~253%,respectively. In addition, the soil sodium adsorption ratio (SAR) and exchangeable sodium percentage (ESP) increased by 5%~109% and 48%~90%, respectively. Whereas, higher nitrogen application (315 and 375 kg/hm2) reduced soil salinity, soil sodium and calcium ion concentrations by 11%~70%, 6%~42%and 21%~138%.Soil SAR and ESP decreased by 5%~27%and 3%~19% respectively. 【Conclusion】Soil salinity increased with the increase of salt content in the irrigation water. And appropriate increase in nitrogen application (315 kg/hm2) could reduce soil salinity, key ion content, and thus alleviate soil salinization.

Key words: Drip irrigation，brackish water，soil salinization，ions，fertigation