Phosphorus (P) in animal diets as a driver of embodied P in animal products and net anthropogenic P inputs

Abstract

One approach to address both the environmental and scarcity issues that occur with phosphorus (P) losses from human systems is to improve understanding of the P demands of bio-based products. Most P demand in the United States is driven by production of crops for animal feed and mineral P feed supplements for animals. In this research, we used the Commodity-Specific Net Anthropogenic Phosphorus and Nitrogen Inputs (CSNAPNI) model to (1) assess the contributions of individual feed products such as corn, soy, and mineral P supplements to the embodied P of animal products and (2) estimate net anthropogenic phosphorus inputs (NAPIs) for the contiguous United States for two animal P-intake scenarios. Results show that P supplements may contribute up to 30% of embodied P in pork and dairy products, up to 60% in chicken, and up to 75% in turkey. Other major contributors to animal product-embodied P are grains, which are responsible for around 60% of embodied P in pork and dairy products, at least 30% in chicken, and at least 20% in turkey products. Results also show that animal P intake is such a significant driver of anthropogenic phosphorus that a reduction of animal P intake by 25% could reduce NAPI to the contiguous United States by 30%.Considering promising research on methods to improve digestibility of both mineral P supplements and grain P in animal diets, these results are encouraging.

Evolution of global phosphorus products trade pattern and China’s phosphorus import and export security

“…对于磷矿石、 磷矿加工产品贸易而言 [30] 。贸易边数 费主要依赖国内磷矿石供应 [16] ， 因此需要积极推进 磷资源可持续管理， 加快转向更循环的经济系统， 如可以改进动物生产系统、 提高动物饲料中磷的消 化率 [67] 。此外， 可以从消费端减少磷资源的浪费。 第 46 卷 第 1 期 资 源 科 学 通过改进食物储存和运输技术、 减少加工过程中的 食物损失 [68]…”

Dairy Manure-Derived Biochar in Soil Enhances Nutrient Metabolism and Soil Fertility, Altering the Soil Prokaryote Community

“…For instance, MBC had higher adsorption and release of ammonia, nitrate, and phosphate in water and soil than WBC [1,3,52,53]. This is not surprising, since dairy cattle are fed nutrient-rich diets to maintain high milk production and their manure contains significant amounts of excreted nutrients, particularly N and P [54,55]. Some transient metals and metal oxides (i.e., Ca, Mg, Fe) in MBC can adsorb high amounts of phosphate, then slowly release them to the soil.…”

Modeling National Embedded Phosphorus Flows of Corn Ethanol Distillers’ Grains to Elucidate Nutrient Reduction Opportunities

“…23 While nutrient trading remains infrequent, the untapped potential for P reduction from manure generated from animal operations has led to a large body of research focused on both technologies for direct P extraction from manure 24 and comparative estimates of P in manure and human waste throughout the US. 9,25,26 Several feed formulation and feeding strategies are being used to reduce P excretion in animal manure but additional efforts are needed. 27−30 A significant portion of P in grains and oilseed meals is in the form of phytate which is indigestible for monogastric animals (i.e., swine and poultry 31 ) but is more digestible for ruminants (i.e., beef and dairy cattle).…”

“…Lack of participation is associated with the difficulty in securing commitments to nutrient management obligations from unregulated nonpoint sources and the uncertainty in actual reductions from agricultural best management practices . While nutrient trading remains infrequent, the untapped potential for P reduction from manure generated from animal operations has led to a large body of research focused on both technologies for direct P extraction from manure and comparative estimates of P in manure and human waste throughout the US. ,, …”