东北典型黑土区坡耕地涝渍地土壤化学性状
发布时间：2018-09-03 06:33
【摘要】：中国东北典型黑土区是我国重要的商品粮生产基地,对我国粮食安全和国民经济的稳定起到举足轻重的作用。作为土壤退化的一种特殊形式,涝渍地严重影响着垦区的农业生产。在东北典型黑土区坡面涝渍地及其周围正常耕地中布设采样点,测定了土壤氧化还原性及相关指标,以揭示坡耕地涝渍土壤与其周围耕种土壤化学性质的差异,得出涝渍土壤所具有的特殊化学性状。结果表明:涝渍土壤与耕种土壤化学性质差异显著。涝渍土壤属于酸性土壤,pH值为5.53,显著低于耕种土壤,有机质含量较高,且越接近涝渍地中心土壤有机质含量越高。涝渍土壤Eh显著低于耕种土壤,空间变异范围较大,但还没有达到强度还原状态。涝渍土壤在长期淹水条件下,大量的Fe3+、一部分高价锰被迅速还原,与耕种土壤相比,涝渍土壤还原性物质总量较高,高出20倍多,亚铁含量高出12倍还多,二价锰含量高出约10倍。
[Abstract]:The typical black soil region in Northeast China is an important commodity grain production base in China, which plays an important role in the food security and the stability of the national economy. As a special form of soil degradation, waterlogging seriously affects agricultural production in reclamation areas. In order to reveal the difference of chemical properties of waterlogged soil in sloping farmland and its surrounding cultivated soil, the soil redox and related indexes were determined by setting sampling points in waterlogged land and its surrounding normal cultivated land in typical black soil area of Northeast China, in order to reveal the difference of chemical properties between waterlogged soil and its surrounding cultivated soil. The special chemical properties of waterlogged soil were obtained. The results showed that the chemical properties of waterlogged soil were significantly different from that of cultivated soil. The pH value of soil in waterlogged soil was 5.53, which was significantly lower than that in cultivated soil, and the content of organic matter was higher, and the more close to the center of waterlogging soil, the higher the content of organic matter. The Eh of waterlogged soil was significantly lower than that of cultivated soil, and the spatial variation range was large, but it had not reached the state of intensity reduction. Under the condition of long-term flooding, a large amount of Fe3 and some high value manganese were rapidly reduced. Compared with cultivated soil, the total amount of reductive material in waterlogged soil was 20 times higher than that in cultivated soil, and the content of ferrous iron was more than 12 times higher than that in cultivated soil. The content of divalent manganese is about 10 times higher.
【作者单位】： 北京师范大学地理学与遥感科学学院;中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室;北京市一六五中学;
【基金】：国家自然科学基金(41571259);国家自然科学基金重点项目(41530858) 中国科学院“西部之光”人才培养引进计划资助
【分类号】：S153
本文编号：2219189
[Abstract]:The typical black soil region in Northeast China is an important commodity grain production base in China, which plays an important role in the food security and the stability of the national economy. As a special form of soil degradation, waterlogging seriously affects agricultural production in reclamation areas. In order to reveal the difference of chemical properties of waterlogged soil in sloping farmland and its surrounding cultivated soil, the soil redox and related indexes were determined by setting sampling points in waterlogged land and its surrounding normal cultivated land in typical black soil area of Northeast China, in order to reveal the difference of chemical properties between waterlogged soil and its surrounding cultivated soil. The special chemical properties of waterlogged soil were obtained. The results showed that the chemical properties of waterlogged soil were significantly different from that of cultivated soil. The pH value of soil in waterlogged soil was 5.53, which was significantly lower than that in cultivated soil, and the content of organic matter was higher, and the more close to the center of waterlogging soil, the higher the content of organic matter. The Eh of waterlogged soil was significantly lower than that of cultivated soil, and the spatial variation range was large, but it had not reached the state of intensity reduction. Under the condition of long-term flooding, a large amount of Fe3 and some high value manganese were rapidly reduced. Compared with cultivated soil, the total amount of reductive material in waterlogged soil was 20 times higher than that in cultivated soil, and the content of ferrous iron was more than 12 times higher than that in cultivated soil. The content of divalent manganese is about 10 times higher.
【作者单位】： 北京师范大学地理学与遥感科学学院;中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室;北京市一六五中学;
【基金】：国家自然科学基金(41571259);国家自然科学基金重点项目(41530858) 中国科学院“西部之光”人才培养引进计划资助
【分类号】：S153
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