Magnesium availability from kieserite and calcined magnesite on five soils of different pH
Magnesium availability from kieserite and calcined magnesite on five soils of different pH
复制标题
不同 pH 值的五种土壤中硅镁石和煅烧菱镁矿的镁利用率
DOI：
10.1111/j.1475-2743.1995.tb00506.x
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
J. Hollis
中科院分区：
文献类型：
--
作者：
S. Heming;J. Hollis
来自英格兰南部的五种土壤与镁肥一起孵育;两种还接受了镁石灰石。两年后，通过用1 M硝酸铵萃取0.5h，所添加的镁的回收率对于镁矾颗粒为75-89%，对于煅烧菱镁矿粉末（<1 mm）为64-84%，但对于煅烧菱镁矿颗粒（1-3 mm）仅为20-41%，对于研磨的镁石灰石仅为26-32%。这些都比通过直接在IM硝酸铵中提取肥料溶解的Mg大得多。在石灰性土壤中，镁的回收率是从煅烧菱镁矿，但这种减少是由于其粒度，而不是土壤pH值。四个镁源作为农业肥料进行评估。镁矾是提高低镁土壤最可靠的方法。
Five soils from the South of England were incubated with additions of magnesium fertilizers ; two also received magnesian limestone. After two years, the recovery of the added magnesium by 0.5 h extraction with 1 M ammonium nitrate was 75-89% for kieserite granules, 64-84% for calcined magnesite powder (<1 mm), but only 20-41% for calcined magnesite granules (1-3 mm) and 26-32% for ground magnesian limestone. These were all much greater than the Mg dissolved by extracting the fertilizers directly in I M ammonium nitrate. In calcareous soils, recovery of Mg was less from the calcined magnesite but most of this reduction was due to its particle size rather than to soil pH. The four magnesium sources are evaluated as fertilizers for agriculture. Kieserite is the most reliable means of raising low soil Mg status.