Abstract: In order to evaluate the effectiveness of different measures on improving saline-alkali soil， the research utilized the following treatments： no fertilization （CK）， 2.1×10⁴ kg·hm² of organic fertilizer （T1）， 2.1×10⁴ kg^-hm^-2 of organic fertilizer combined with 1500 kg·hm^-2 of urea phosphate （T2）， 2.1×10⁴kg·hm² of organic fertilizer combined with 4500 kg·hm^-2 of straw （T3）， and 2.1×10⁴kg·hm² of organic fertilizer combined with 4500 kg·hm² of straw and 1500 kg·hm^-2 of urea phosphate （T4）. These treatments were employed to investigate the physical and chemical properties of the soil， as well as the salt ions and organic carbon components across various soil layers. The results indicated that the amounts of total salt， Cl^-， SO₄^2-， and soil exchangeable Na⁺ in various months followed this order： June>August>October. The contents of SOM， readily oxidized organic carbon （ROC）， soil non-labile carbon （NLC）， AN， and AP were ranked as follows： June>October>August. The contents of K⁺ and Mg²⁺ were in this order： August>October>June. For Ca²⁺， the order was June>October>August， whereas for AK， the ranking was October>August>June. Under four different treatments， the average contents of K⁺， Mg²⁺， AN， AP， AK， SOM， ROC， and NLC in different months were higher than those in CK. Among them， the T4 treatment increased each index by 83.33%， 12.03%， 86.38%， 352.93%， 33.04%， 61.07%， 61.07%， and 28.87% compared to CK， respectively， whereas the average contents of Na⁺， Cl^-， SO₄^2-， and total salt were lower than those of CK， with T4 treatment showing a decrease of 55.21%， 30.23%， and 80.82% in various indicators compared to CK， respectively. The comprehensive evaluation showed that the improvement effect of different improvement measures on salinized soil was T4>T2>T3>T1>CK.

Key words: Saline soil, Hexi Corridor, Inert carbon, Salt ions, Easily oxidizable organic carbon

摘要： 为评估不同措施对盐渍化土壤的改良效果，本研究以饲用玉米地不施肥（CK）、施有机肥2.1×10⁴ kg·hm^-2（T1）、有机肥2.1×10⁴ kg·hm^-2+磷酸脲1500 kg·hm^-2（T2）、有机肥2.1×10⁴ kg·hm^-2+秸秆4500 kg·hm^-2（T3）、有机肥2.1×10⁴ kg·hm^-2+秸秆4500 kg·hm^-2+磷酸脲1500 kg·hm^-2（T4）为研究对象，对不同土层土壤理化性质、盐分离子和有机碳组分进行了研究。结果表明：不同月份间，各处理土壤可溶性Na⁺，Cl^-，SO₄^2-和全盐含量均表现为6月>8月>10月；AN、AP、SOM、易氧化有机碳（ROC）和惰性碳（NLC）含量均表现为6月>10月>8月；K⁺和Mg²⁺含量均表现为8月>10月>6月；Ca²⁺含量表现为6月>10月>8月；AK含量表现为10月>8月>6月。4种处理下，K⁺，Mg²⁺，AN，AP，AK，SOM，ROC和NLC含量在不同月份的均值均高于CK，其中T4处理各指标较CK分别增加了83.33%，12.03%，86.38%，352.93%，33.04%，61.07%，61.07%和28.87%；而Na⁺，Cl^-，SO₄^2-和全盐含量均值均小于CK，其中T4处理各指标较CK分别降低了55.21%，30.23%和80.82%。综合评价表明，不同改良措施对盐渍化土壤的改良效果表现为T4>T2>T3>T1>CK。

关键词: 盐渍土壤, 河西走廊, 惰性碳, 盐分离子, 易氧化有机碳