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首页> 外文学位 >EVALUATION OF ROCK PHOSPHATE AND FLY ASH AMENDMENTS TO AMELIORATE TOXIC CONDITION IN ACID MINE SOILS FOR CROP PRODUCTION.
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EVALUATION OF ROCK PHOSPHATE AND FLY ASH AMENDMENTS TO AMELIORATE TOXIC CONDITION IN ACID MINE SOILS FOR CROP PRODUCTION.

机译：评估磷酸盐和粉煤灰修正品以缓解作物生产中酸性土壤中的有毒状况。

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摘要

A greenhouse investigation was conducted with corn and alfalfa to evaluate rock phosphate (rock-P) and fly ash as amendments to ameliorate toxic conditions in three acid mine soils. The extremely acid mine soils from Valley Point (VP), Westover (WO), and Lenox (LX) were each mixed with fly ash at a rate of 0%, 33% or 67%, and with rock-P at a rate of 0, 10, 20 or 40 g/kg soil in a factorial combination.;Application of rock-P to the three mine soils alone gave significantly higher corn yield than those receiving both rock-P and fly ash. On the other hand, higher alfalfa yields were obtained when rock-P was applied along with fly ash compared to rock-P alone. Similar trends in yields of corn and alfalfa grown on the three mine soils treated with fertilizer and fly ash, were obtained as in the case of rock-P and fly ash mix. However, dry matter yield of both crops were lower than those obtained on rock-P/fly ash mix.;Application of both rock-P and fly ash probably reduced the concentration of Mn and Al in corn and alfalfa crops. However, application of fly ash increased B concentrations in some cases to toxic levels in both corn and alfalfa crops. Application of rock-P increased available P in the pots without fly ash, however, the increase was somewhat lower in pots treated with both fly ash and rock-P. The concentrations of exchangeable Al in the three mine soils decreased with application of rock-P and fly ash.;Phosphate fractionation indicated that, application of rock-P increased Calcium-P (Ca-P) in all three mine soils. With time, the rock-P was initially transferred to Al-P and then to Fe-P. However, application of fly ash to the three mine soils resulted in the conversion of rock-P to Al-P, due to the high Al content of fly ash.;In a corollary experiment, rock-P was replaced with fertilizer consisting of monocalcium phosphate (200 kg P/ha), KNO(,3) and KCl (112 kg/ha), calcium carbonate (225 kg Ca/ha), magnesium chloride (200 kg Mg/ha). Two crops of corn followed by three successive crops of alfalfa were grown on each mine soil fly ash mixture.;This study suggests that application of fly ash alone or in combination with rock-P may be used for reclamation of strip mine soils provided crops like alfalfa are grown.
机译：对玉米和苜蓿进行了温室调查，以评估磷酸盐岩（rock-P）和粉煤灰的改良效果，以改善三种酸性矿山土壤中的毒性条件。来自Valley Point（VP），Westover（WO）和Lenox（LX）的极酸性矿土分别以0％，33％或67％的比例与粉煤灰混合，并以0、10、20或40 g / kg的土壤以因子组合方式施用；仅将P施用到三种矿山土壤中，比同时施用P和粉煤灰的土壤可显着提高玉米产量。另一方面，与单独施用磷磷肥相比，将磷磷肥与粉煤灰一起施用可获得更高的苜蓿产量。在用磷和粉煤灰混合的情况下，在用肥料和粉煤灰处理过的三种矿土上生长的玉米和苜蓿的产量趋势相似。然而，两种作物的干物质产量均低于使用磷-粉煤灰/粉煤灰混合物获得的产量。；施用磷-粉煤灰和粉煤灰可能会降低玉米和苜蓿作物中的锰和铝含量。但是，在某些情况下，粉煤灰的施用会使玉米和苜蓿作物中的B浓度增加到有毒水平。施用磷肥可增加无粉煤灰的盆栽土壤中的有效磷含量，但是，用粉煤灰和磷肥处理的花盆中的磷含量增加幅度较小。三种磷矿土壤中可交换铝的含量随施用磷和粉煤灰而降低。磷酸盐分馏表明，施用磷磷使三种矿土壤中的钙磷（Ca-P）均增加。随着时间的流逝，岩石P最初转移到Al-P，然后转移到Fe-P。然而，由于粉煤灰中铝的含量高，在三种矿土上施用粉煤灰导致了岩石P向Al-P的转化。；在推论实验中，岩石P被单钙组成的肥料替代磷酸盐（200 kg P / ha），KNO（，3）和KCl（112 kg / ha），碳酸钙（225 kg Ca / ha），氯化镁（200 kg Mg / ha）。在每种矿山土壤粉煤灰混合物上均种植了两种玉米作物，然后连续种植了三类苜蓿作物；该研究表明，如果粉煤灰土壤像苜蓿种植。

著录项

  • 作者

    GHAZI, HUSSEIN EISA.;

  • 作者单位

    West Virginia University.;

  • 授予单位 West Virginia University.;
  • 学科 Agronomy.
  • 学位 Ph.D.
  • 年度 1984
  • 页码 328 p.
  • 总页数 328
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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