Olivine weathering in soil, and its effects on growth and nutrient uptake in Ryegrass (Lolium perenne L.): a pot experiment.
Olivine weathering in soil, and its effects on growth and nutrient uptake in Ryegrass (Lolium perenne L.): a pot experiment.
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DOI：
10.1371/journal.pone.0042098
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Verhagen J
中科院分区：
文献类型：
--
作者：
ten Berge HF;van der Meer HG;Steenhuizen JW;Goedhart PW;Knops P;Verhagen J
碱性硅酸盐矿物的矿物碳化通过锁定碳在地质时间尺度上调节大气中的二氧化碳。有人提议开采橄榄石等快速风化硅酸盐并将其散布到地球表面，以加速这种自然二氧化碳封存（“增强风化”）。虽然农业可以提供现有的基础设施，但风化率以及对土壤和植物的影响在很大程度上是未知的。我们的目标是评估土壤中橄榄石的风化及其对植物生长和养分吸收的影响。在多年生黑麦草 (Lolium perenne L.) 的盆栽实验中，根据土壤和植物中镁 (Mg) 的生物利用度推断出 32 周内的风化情况。橄榄石剂量相当于 1630 (OLIV1)、8150、40700 和 204000 (OLIV4) kg ha−1。或者，以可溶性镁盐硫镁石作为参考。橄榄石增加了 OLIV4 中的植物生长 (+15.6%) 和植物钾浓度 (+16.5%)。在所有剂量下，橄榄石都能增加土壤中镁和镍的生物利用度，以及植物对镁、硅和镍的吸收。橄榄石抑制钙的吸收。根据镁平衡估计的风化相当于 240 kg ha−1（剂量的 14.8%，OLIV1）至 2240 kg ha−1（1.1%，OLIV4）。这对应于 290 至 2690 kg ha−1（29 103 至 269 103 kg km−2）的总 CO2 封存量。或者，根据与硫镁石处理的相似性估计，OLIV1 的风化作用范围为 13% 至 58%。橄榄石碳化的奥尔森模型预测我们的案例中风化程度为 4.0% 至 9.0%，与橄榄石剂量无关。我们在高剂量下观察到的百分比值小于此值，表明土壤中存在负反馈。然而，风化速度似乎足够快，足以支持“增强风化”的概念。在农业中，橄榄石剂量必须保持在一定限度内，以避免植物营养失衡，特别是在钙利用率较低的情况下；避免镍在土壤和作物中积累。
Mineral carbonation of basic silicate minerals regulates atmospheric CO2 on geological time scales by locking up carbon. Mining and spreading onto the earth's surface of fast-weathering silicates, such as olivine, has been proposed to speed up this natural CO2 sequestration (‘enhanced weathering’). While agriculture may offer an existing infrastructure, weathering rate and impacts on soil and plant are largely unknown. Our objectives were to assess weathering of olivine in soil, and its effects on plant growth and nutrient uptake. In a pot experiment with perennial ryegrass (Lolium perenne L.), weathering during 32 weeks was inferred from bioavailability of magnesium (Mg) in soil and plant. Olivine doses were equivalent to 1630 (OLIV1), 8150, 40700 and 204000 (OLIV4) kg ha−1. Alternatively, the soluble Mg salt kieserite was applied for reference. Olivine increased plant growth (+15.6%) and plant K concentration (+16.5%) in OLIV4. At all doses, olivine increased bioavailability of Mg and Ni in soil, as well as uptake of Mg, Si and Ni in plants. Olivine suppressed Ca uptake. Weathering estimated from a Mg balance was equivalent to 240 kg ha−1 (14.8% of dose, OLIV1) to 2240 kg ha−1 (1.1%, OLIV4). This corresponds to gross CO2 sequestration of 290 to 2690 kg ha−1 (29 103 to 269 103 kg km−2.) Alternatively, weathering estimated from similarity with kieserite treatments ranged from 13% to 58% for OLIV1. The Olsen model for olivine carbonation predicted 4.0% to 9.0% weathering for our case, independent of olivine dose. Our % values observed at high doses were smaller than this, suggesting negative feedbacks in soil. Yet, weathering appears fast enough to support the ‘enhanced weathering’ concept. In agriculture, olivine doses must remain within limits to avoid imbalances in plant nutrition, notably at low Ca availability; and to avoid Ni accumulation in soil and crop.
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影响因子：
6.1
作者：
MACINTIRE, WH;MARSHALL, HL
通讯作者：
MARSHALL, HL
影响因子：
9.4
作者：
Nagy, L;Proctor, J
通讯作者：
Proctor, J
影响因子：
11.4
作者：
Bearat, Hamdallah;McKelvy, Michael J.;Wolf, George H.
通讯作者：
Wolf, George H.
DOI：
10.1080/00103629909370338
发表时间：
1999-01-01
影响因子：
1.8
作者：
Fernández, S;Seoane, S;Merino, A
通讯作者：
Merino, A
影响因子：
--
作者：
Hartmann, Jens;Kempe, Stephan
通讯作者：
Kempe, Stephan