1、有效磷

土壤 有效磷，Available phosphorous,缩写为A-P，也称为速效磷，是土壤中可被植物吸收的磷组分，包括全部水溶性磷、部分吸附态磷及有机态磷，有的土壤中还包括某些沉淀态磷。

2、Changes of effective phosphorus content and its simple microbiological

Phosphorus is a vital nutrient for plants, in which only free phosphate ions, phosphorus adsorbed by iron or aluminum oxide, and phospholipids and nucleic acids can be directly utilized by vegetation [1].

3、Phosphorus Content

Phosphorus content refers to the amount of phosphorus present in biodiesel fuels, which results from the incomplete refinement of phospholipids in vegetable oils and animal fats.

4、有效磷

土壤 有效磷，Available phosphorous,縮寫為A-P，也稱為速效磷，是土壤中可被植物吸收的磷組分，包括全部水溶性磷、部分吸附態磷及有機態磷，有的土壤中還包括某些沉澱態磷。

国家标准

中国标准分类号（CCS） G20 国际标准分类号（ICS） 65.080 发布日期 2010-09-26 实施日期 2011-03-01 主管部门 中国石油和化学工业联合会 归口部门 中国石油和化学工业联合会 发布单位 中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会 备注 2011-03-01实施,代替GB/T 8573-1999 知道了

Total phosphorus (a) and effective phosphorus (b) content of HC and

This study systematically investigated the effects of reaction parameters, including temperature and residence time, on the microstructure and nutrient content of hydrochar de...

有效磷含量,effective phosphorus content英语短句,例句大全

1.The total content and the available content of heavy metals (Cu,Pb,Zn,Cr,Ni,Cd,As and Hg) in soils from main cities' suburbs of the Pearl River delta were analyzed.分析了珠江三角洲主要城市郊区农业土壤的8种重金属Cu、Pb、Zn、Cr、Ni、Cd、As和Hg的全量和有效态含量。

A Review of Recent Developments in Analytical Methods for Determination

Phosphorus is essential to environmental systems because it affects both agricultural productivity and ecological balance. Since it contributes to eutrophication and pollution problems, its existence in a variety of environmental matrices, including ...

Changes of effective phosphorus content and its simple microbiological

Phosphorus bioavailability proved a critical indicator for assessing compost product quality, yet the efficiency of phospho-rus activation in traditional sludge composting processes is unfavorable.

Spatial differentiation and influencing factors of effective phosphorus

The results show that the effective phosphorus content in the topsoil of the study area ranges from 0.30 to 146.00 mg/kg, with an average value of 14.28 mg/kg, showing strong variability characteristics.

The effective phosphorus content in calcium magnesium phosphate fertilizers is a crucial factor that significantly impacts plant growth, agricultural sustainability, and environmental protection. This article delves into the definition, determination methods, standard values, relationships with plant growth and soil environment, implications for施肥技术 (fertilization techniques), and its role in promoting sustainable agriculture.

I. Definition of Effective Phosphorus Content

The effective phosphorus content refers to the actual amount of phosphorus in calcium magnesium phosphate (CMP) that can be absorbed and utilized by plants. A higher effective phosphorus content indicates better availability of phosphorus in the fertilizer, which in turn promotes greater growth in plants.

II. Determination Methods

1. Sample Preparation: A specific amount of the CMP sample (typically 0.5-1g) is taken and dried to constant weight in a desiccator.

2. Digestion: The dried sample is subjected to high-temperature digestion in a furnace, converting phosphorus into a soluble form of phosphate. Common digestion methods include wet digestion using nitric acid and hydrogen fluoride, and dry digestion through high-temperature ashing, releasing phosphorus.

3. Standardization: The digested solution is transferred to a volumetric flask and diluted to the mark with deionized water.

4. Titration: Molybdenum blue colorimetry or phosphomolybdenum blue colorimetry is used for titration. Indicators are added during titration, and the endpoint is determined by color changes indicating complete reduction of phosphorus to orthophosphate. The volume of reagent consumed calculates the effective phosphorus content in the sample.

III. Standard Values

Different countries and regions have varying standards for effective phosphorus content in CMP, generally ranging from 12% to 20%. This means that in every 100 parts of CMP, the effective phosphorus should be between 12-20 parts. These standards are based on plant phosphorus requirements, soil conditions, and fertilizer effectiveness.

IV. Relationship with Plant Growth

Sufficient phosphorus promotes root and shoot development, enhances photosynthesis efficiency, and increases yield in plants. excessive phosphorus can lead to phosphorus accumulation and physiological disorders such as iron oxidation in plants. controlling the effective phosphorus content in CMP is essential for healthy plant growth.

V. Relationship with Soil Environment

Soil factors like pH, organic matter content, and microbial activity influence phosphorus dissolution and availability. For instance, lower effective phosphorus content in acidic soils due to reduced phosphorus solubility; higher content in alkaline soils due to increased solubility. Organic matter forms stable complexes with phosphorus reducing its availability, while microbial activity accelerates phosphorus release and transformation. Thus, considering soil conditions is vital when selecting and applying CMP to ensure efficient use.

VI. Relationship with Fertilization Techniques

Effective phosphorus content in CMP is affected by soil conditions and also relates closely to fertilization practices. Optimizing techniques like deep placement, layered application, timely topdressing, and proper rationing match fertilizer supply with plant needs, enhancing efficiency and avoiding waste and pollution. Scientific fertilization plans based on crop stages, soil conditions, and climate are necessary for efficient CMP use and healthy crop growth.

VII. Relationship with Sustainable Agriculture

Effective phosphorus content is a key indicator for evaluating CMP quality and supporting sustainable agriculture. With global population growth and increased food demand, efficient use of chemicals like CMP reduces environmental impact and resource waste, enabling sustainable farming. By refining application techniques, improving efficiency, and reducing overuse, we can minimize agriculture's environmental burden, promoting long-term viability.

understanding the effective phosphorus content in calcium magnesium phosphate is essential for plant health, efficient resource use, and environmental protection. Proper management through scientific strategies ensures optimal outcomes in agriculture.