Domestic sewage sludge or biosolids and lake-dredged materials are examples of materials that can be used to cut fertilizer costs in pasture-based animal agriculture. Sustainable biosolids and lake-dredged materials management is based upon controlling and influencing the quantity, quality and characteristics of these materials in such a way that negative impacts to the environment are avoided and beneficial uses are optimized. This article examines the following two key questions. Is the use of these materials in an agricultural setting harmless and sensible? Is the use of biosolids secure in all climates, in all soils and is it sustainable over the long term? Recycling biosolids and lake-dredged materials to pasture-based animal production is quite productive as alternative nutrient sources for forage production. Perennial grass can be a good choice for repeated applications of biosolids and lake-dredged materials. Although biosolids and lake-dredged materials supply some essential plant nutrients and provide soil property-enhancing organic matter, land-application programs still generate some concerns because of possible health and environmental risks involved. Repeated applications of biosolids and lake-dredged materials indicate no harmful effects on soil quality and forage quality. Beneficial uses of biosolids and lake-dredged materials are both economical and environmental. The concentrations of soil nitrogen and phosphorus following repeated application of biosolids were far below the contamination risk in the environment. The residual effect of biosolids over the long term can be especially significant in many forage-based pastures where only 50% of the million hectares of pastures are given inorganic nitrogen yearly. Long-term studies have demonstrated the favorable and beneficial effects of added lake-dredged materials on the early establishment of bahiagrass in sandy pasture fields. Often these materials can be obtained at little or no cost to the farmers or landowners. Lake-dredged materials can be used as soil amendments (lime and fertilizer) for early establishment of bahiagrass in beef cattle pastures. Bahiagrass in plots that were treated with biosolids and lake-dredge materials had significantly higher forage yield and crude protein content when compared with those bahiagrass in the control plots or untreated plants.

中文翻译：

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将生物固体和湖边疏materials的材料循环利用到以牧场为基础的畜牧业：草料生产力和可持续性的替代养分来源。回顾

生活污水污泥或生物固体以及湖边疏materials的材料是可用于降低基于牧场的畜牧业肥料成本的材料的例子。可持续的生物固体和湖泊疏materials材料管理基于控制和影响这些材料的数量，质量和特性的方式，从而避免了对环境的负面影响并优化了有益的用途。本文研究了以下两个关键问题。在农业环境中使用这些材料是否无害且明智？在所有气候，所有土壤中使用生物固体是否安全，并且长期可持续吗？作为草料生产的替代养分来源，将生物固体和湖边疏materials的材料循环利用到以牧场为基础的动物生产中，具有很高的生产力。多年生草可能是重复施用生物固体和湖边疏materials材料的理想选择。尽管生物固体和湖边疏materials的物质提供了一些必需的植物养分并提供了增强土壤特性的有机物，但土地应用计划仍然引起一些担忧，因为其中可能涉及健康和环境风险。重复施用生物固体和湖泊疏materials材料表明对土壤质量和草料质量没有有害影响。有益地使用生物固体和疏lake湖水的材料既经济又环保。重复施用生物固体后土壤氮和磷的浓度远低于环境污染的风险。从长远来看，生物固体的残留效应在许多以草料为基础的牧场中尤其显着，在这些牧场中，每年只有一百万公顷牧场中有50％给予无机氮。长期研究表明，在沙质草场中添加湖泊疏materials材料对Bahiagrass的早期建立具有有利和有益的作用。通常，这些材料对于农民或土地所有者而言几乎可以免费获得，也可以免费获得。湖边疏materials的材料可以用作土壤改良剂（石灰和肥料），以早期在肉牛牧场中建立Bahiagrass。与对照样地或未经处理的植物中的Bahiagrass相比，用生物固体和湖泊疏materials材料处理过的地块中Bahiagrass的草料产量和粗蛋白含量明显更高。