Effect of dolomitic limestone and gypsum applications on soil solution properties and yield of corn and groundnut grown on ultisols.
Effect of dolomitic limestone and gypsum applications on soil solution properties and yield of corn and groundnut grown on ultisols.
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白云质石灰石和石膏的施用对土壤溶液性质以及在腐土上生长的玉米和花生产量的影响。
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
L. C. Bell
中科院分区：
文献类型：
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作者：
J. Shamshuddin;I. Fauziah;L. C. Bell
研究了土壤溶液性质和玉米、花生对土壤酸度的相对耐受性。在表土中加入石灰或石膏一个月后，在Ultisols上种植玉米和花生。土壤样本是在玉米和花生收获后采集的。采用氟碳三氯乙烷不混溶置换土壤水的方法提取土壤溶液。结果表明，不同处理对土壤全铝、无机铝、钙、镁含量的影响规律不同。然而，当溶液pH值较低时，总铝值很高，特别是在石灰含量低或石膏含量高的处理中。结果表明，石膏溶解释放的钙取代了交换络合物中的铝，导致溶液中铝的浓度较高。玉米和花生90%相对产量对应的溶液pH分别为4.7和4.3。这意味着花生比玉米对土壤酸性的耐受性更强。在花生栽培中，可能需要低用量的石灰化腐植土。对于玉米种植，施灰量为2t ha，为玉米植株的生长提供了充足的钙和镁。
A study was conducted to determine soil solution properties and relative tolerance of corn and groundnut plants to soil acidity. Corn followed by groundnut was planted on Ultisols one month after lime or gypsum was incorporated into the topsoil. Soil samples were collected after corn and groundnut harvest. Soil solutions were extracted by the immiscible replacement method of soil water with fluorocarbon trichlorofluoroethane. Results showed that total Al, inorganic Al, Ca, and Mg concentrations were erratically affected by the treatments. However, total Al values were indicated to be high when solution pHs were low, especially at treatments with low amounts of lime or high amounts of gypsum. It appeared that Ca released from the dissolution of gypsum had replaced Al in the exchange complex, causing the high concentrations of Al in the solution. Solution pH, corresponding to 90% relative yields of corn and groundnut, were 4.7 and 4.3, respectively. This means that groundnut is more tolerant to soil acidity than corn. Liming Ultisols at low rates may be necessary for groundnut cultivation. For corn cultivation, the liming rate is 2 t ha, which supplies adequate amounts of Ca and Mg for the growth of corn plants.