Effect of Liming on the Distribution of Manganese, Copper, Iron, and Zinc Among Soil Fractions1
Effect of Liming on the Distribution of Manganese, Copper, Iron, and Zinc Among Soil Fractions1
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施石灰对土壤组分中锰、铜、铁和锌分布的影响 1
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
L. M. Shuman
中科院分区：
文献类型：
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作者：
L. M. Shuman
微量营养素的有效性受到土壤性质的影响，如pH值，有机质含量和粘土矿物。其中一些特性可以通过耕作来改变。因此，进行了一项研究，以确定耕作对锰，铜，铁，锌在土壤组分之间的分配的影响。从长期（8年）耕作实验中，在0至2厘米深的土壤样品。处理有免耕、少耕（仅秋耕）和常规耕作（春、秋耕）。土壤样品进行分级，依次确定锰，铜，铁，锌在以下馏分：可交换的，有机，锰氧化物，无定形氧化铁，结晶氧化铁，和残留。双酸可提取的P和Zn，有机质含量，阳离子交换量在免耕处理高于其他耕作处理。耕作方式对Mn、Fe在各组分间的分配影响较大，而对Zn、Cu的分配影响较小。与少耕或常规耕作相比，免耕降低了交换性和无定形氧化铁组分中的Mn，提高了有机组分中的Mn。免耕土壤交换态铁和有机态铁含量较高，而非晶态氧化态铁和残留态铁含量较低。锰和铁似乎被转移免耕从氧化物和残留物的形式到更多的植物可交换或有机形式。附加索引词：保护性耕作、双酸、微量营养素分布。查看完整的文章要查看这篇完整的文章，请插入光盘4，然后单击按钮8
The availability of micronutrients is affected by soil properties such as pH, organic matter content, and clay mineralogy. Some of these properties can be altered by tillage. Therefore, a study was conducted to determine the influence of tillage on the distribution of Mn, Cu, Fe, and Zn among soil fractions. Soil samples were taken at the 0 to 2 cm depth from a long-term (8 yr) tillage experiment. The treatments were no-tillage, minimum tillage (fall tillage only), and conventional tillage (spring and fall tillage). Soil samples were fractionated sequentially to determine Mn, Cu, Fe, and Zn in the following fractions: exchangeable, organic, Mn oxide, amorphous Fe oxide, crystalline Fe oxide, and residual. Double acid-extractable P and Zn, organic matter content, and cation exchange capacity were higher in no-tillage treatments than in the other tillage treatments. Tillage had more effect on the distribution of Mn and Fe among fractions than on the distribution of Zn and Cu. No-tillage lowered the Mn in the exchangeable and amorphous Fe oxide fractions and raised Mn in the organic fraction compared to minimum tillage or conventional tillage. Iron in the exchangeable and organic fractions was higher for no-tillage, while amorphous oxide Fe and residual Fe were lower for no-tillage compared to conventional tillage. Both Mn and Fe appeared to be shifted by no-tillage from the oxide and residual forms into the more plant-available exchangeable or organic forms. Additional Index Words: conservation tillage, double acid, micronutrient distribution. View complete article To view this complete article, insert Disc 4 then click button8