1、Controlled

Trends in crop production (maize and wheat) in the last four decades show that N application rates increased about 15 times whereas its accumulation in grain increased only 3 to 4 times. At the same time nutrient recovery by crops remained relatively low (e.g. about 50% for N).

2、Review on materials & methods to produce controlled release coated urea fertilizer

An ideal controlled release fertilizer is coated with a natural or semi-natural, environmentally friendly macromolecule material that retards fertilizer release to such a slow pace that a single application to the soil can meet nutrient requirements for model crop growth [6].

3、Global Change Biology

These practices included the application of controlled-release N fertilizer, nitrification inhibitor (NI) and urease inhibitor (UI), higher splitting frequency of fertilizer N application, lower basal N fertilizer (BF) proportion, deep placement of N fertilizer, and optimal N rate based on soil N test.

4、Cumulative release characteristics of controlled

Many studies have found that the application of controlled-release urea (CRU) and controlled-release potassium (CRK) greatly improved the yields and fertilizer use efficiencies of crops.

Effect of controlled release fertilizer type and rate on mineral nutrients, non

Our observations of Chine pine seedling dry mass, N content and concentration in response to a broad range of controlled release fertilizer (CRF) rates applied in the nursery align well with the conceptual model proposed by Timmer (1996) to identify optimal fertilization regimes.

Effect of controlled

The use of enhanced-efficiency fertilizers (e.g., urease inhibitors, nitrification inhibitors, and controlled-release N fertilizers (CRFs)) is a management practice that could potentially improve NUE and thereby reduce N loss.

Controlled

A wide array of controlled-release fertilizer (CRF) materials is available, varying in release duration from 3 to 24 months, for use in ornamental and nursery crops, floricultural and foliage crops, turf and forage usage, vegetable crops and tree crop production. Interest in these materials is primarily for one or more of the following reasons:

The rice production practices of high yield and high nitrogen use efficiency in Jiangsu, China

Through controlling total N rates and adjusting the application timing, the yield and the PFPN of optimal N managements (OPT) were increased by 5.9% and 37.6% with 31.4% reduction in N supply...

Effects of a controlled

Methods: Field experiments were conducted to study the effects of controlled-release fertilizer (CRF) on seed yield, plant growth, nutrient uptake, and fertilizer usage efficiency for early ripening rapeseed (Xiangzayou 1613) in the red-yellow soil of southern China during 2011–2013.

Controlled

The use of controlled-release urea (CRU) has become one of best management practices for increasing crop yield and improving nitrogen (N) use efficiency (NUE). However, the effects of CRU on direct-seeded rice are not well understood while direct-seeding has gradually replaced transplanting due to increasing labor cost and lack of irrigation water.

In agricultural production, rational fertilization is key to improving crop yield and quality. Controlled-release fertilizers (CRF) are designed to release nutrients slowly over time, offering several advantages over traditional single-application fertilization:

1. Enhancing Fertilizer Use Efficiency: CRF releases nutrients gradually based on crop needs and soil conditions, minimizing waste.

2. Reducing Environmental Pollution: By lowering the total amount of chemical fertilizers used, CRF reduces soil and groundwater contamination.

3. Improving Crop Yield and Quality: CRF provides balanced nutrient supply, promoting growth and higher yields while reducing pest and disease incidence, thus enhancing crop quality.

4. Lowering Labor Intensity: CRF allows precise, timely application aligned with crop growth stages, reducing manual labor for farmers.

5. Promoting Soil Health: CRF improves soil structure and organic matter content, benefiting long-term soil vitality.

6. Adapting to Crop-Specific Needs: CRF can be tailored to match the growth cycles and nutrient requirements of different crops by adjusting release timing and dosage.

Guidelines for Proper CRF Use:

1. Understand CRF Types and Characteristics: Select CRF based on nutrient composition, release rates, and brand-specific properties.

2. Match CRF to Crop Needs: Choose formulations suited to the nutritional and growth demands of specific crops.

3. Follow Product Instructions: Apply CRF strictly according to manufacturer guidelines to avoid over- or under-application.

4. Time Application Appropriately: Align fertilization schedules with crop growth phases to ensure nutrient release matches demand.

5. Monitor Soil and Crop Health: Regular soil testing and crop observation help assess CRF effectiveness and guide adjustments.

6. Combine with Organic Fertilizers: Integrating CRF with organic fertilizers enhances soil structure and fertility, optimizing crop performance.

7. Account for Climate Factors: Temperature, precipitation, and other climatic conditions influence nutrient release and crop growth, requiring adaptive application strategies.

8. Follow Local Agricultural Advice: Adhere to regional guidelines provided by agricultural departments, which consider local soil, climate, and crop characteristics.

Proper use of CRF can boost crop productivity, reduce environmental impact, lower labor costs, and sustain soil health. Successful implementation requires selecting appropriate CRF types, adhering to application protocols, combining with organic fertilizers, and considering climatic factors. Scientific fertilization practices maximize the benefits of CRF, supporting sustainable agricultural development.