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首页> 外文期刊>Plant and Soil >Effect of phosphate rock, coal combustion by-product, lime, and cellulose on ryegrass in an acidic soil.
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Effect of phosphate rock, coal combustion by-product, lime, and cellulose on ryegrass in an acidic soil.

机译：磷酸盐岩，燃煤副产物，石灰和纤维素对酸性土壤中黑麦草的影响。

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Soil incubation and greenhouse pot experiments were carried out to examine the interactions between phosphate rock (PR), the coal combustion byproduct gypsum (BP), dolomitic lime (L) and cellulose (C) in an acidic soil and their effects on growth ofLolium perenne cv. Linn. BP and PR application increased plant P content and dry matter yield (DMY) of shoots and roots by improving soil Ca availability and reducing Al toxicity. Application of BP at low rates (5 to 10 g BP kg-1 soil) with PR decreasedboth plant P content and DMY compared with PR application alone. The reduced DMY was due to an increased Al concentration in soil solution as a result of displacement of sorbed Al by Ca from BP. Increases in DMY were obtained by addition of lime along with PR and BP at low rates or by increasing BP application rates above 15 g kg-1. It was suggested that this improved plant response was related to alleviation of Al toxicity by CaCO3 contained in the BP. In addition to raising the pH to an acceptable level for plant growth, the dolomitic lime supplied required Mg for plants, thereby maintaining a good balance between available Ca and Mg for plants in the BP- and PR-amended soils. The addition of cellulose to the BP- and PR-amended soils reduced water-soluble Al and increased DMY. Plant growth increased PR dissolution by 2.4 to 243% in a soil with low available P. It was concluded that use of BP at moderate rates with PR and dolomitic lime were the best combination for increasing crop yields on infertile acidic soils.
机译：进行了土壤培养和温室盆栽试验，以研究酸性土壤中磷酸盐岩（PR），煤燃烧副产物石膏（BP），白云石石灰（L）和纤维素（C）之间的相互作用及其对黑麦草生长的影响。简历。林恩施用BP和PR可以提高土壤Ca的利用率并减少Al的毒性，从而提高植物P含量和茎和根的干物质产量（DMY）。与单独施用PR相比，施用PR的低剂量BP（5至10 g BP kg-1土壤）降低了植物P含量和DMY含量。 DMY降低是由于钙从BP置换吸附的Al导致土壤溶液中Al浓度增加。通过以低量添加石灰，PR和BP或将BP施用量增加到15 g kg-1以上，可以增加DMY。有人认为，这种改善的植物反应与BP中所含CaCO3减轻Al毒性有关。除了将pH值提高至植物生长的可接受水平之外，白云石石灰还提供了植物所需的镁，从而在经过BP和PR改良的土壤中，植物体内可利用的钙和镁之间保持了良好的平衡。向BP和PR改良土壤中添加纤维素可减少水溶性Al，并增加DMY。在低有效磷的土壤中，植物的生长使PR的溶出度提高了2.4％至243％。得出的结论是，以适量的BP与PR和白云石石灰一起使用BP是增加不肥酸性土壤上作物产量的最佳组合。

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