1、Nitrogen transformations in modern agriculture and the role of biological nitrification inhibition

Here, we discuss mitigation of the harmful and wasteful process of agricultural N loss via biological nitrification inhibitors (BNIs) exuded by plant roots.

2、Comparison of yield and nitrogen use efficiency of different types of nitrogen fertilizers for different rice cropping systems under subtropical monsoon

Controlled release urea (CRU) and urea with nitrification inhibitor could improve yields and nitrogen use efficiency (NUE) in a number of production systems. However, their effectiveness will be strongly influenced by environmental conditions.

3、Environmentally Friendly Slow

The release profiles of urea, ammonium sulfate, and ammonium chloride as nitrogen fertilizer substrates were determined in soil. To further compare the release profiles of nitrogen from different fertilizer substrates, a mathematical model for nutrient release from the coated fertilizer was applied to calculate the diffusion coefficient D.

A comparison of organic and inorganic nitrogen fertilizers: Their nitrate

A comparison of organic and inorganic nitrogen fertilizers: Their nitrate-N and ammonium-N release characteristics and effects on the growth response of lettuce (Lactuca sativa L. cv. Fortune).

The fates of 15N

Appropriate fertilization practice is crucial to achieve maximum wheat grain yield with minimum nitrogen (N) loss.

Full article: Nitrogen Release Characteristics from Biosolids

This study investigated the availability of nitrogen (N) following soil application of a novel biosolids-derived organomineral fertilizer (OMF 15 —15:4:4) in comparison with urea (46% N).

Impact of plastic film mulching and fertilizers on the distribution of straw

Fertilizers increased straw-N transfer to these plant parts both with and without mulching due to the increase of plant biomass, showing greater plant utilization rates of straw-N in the N fertilizer addition treatments, while residual rates of straw-N in soil decreased in these treatments.

Combined application of nitrogen and phosphorus fertilizers increases soil organic carbon storage in cropland soils

Fertilizer application strategies can impact soil health, mainly soil organic carbon (SOC) and total nitrogen (TN) sequestration, which are essential in mitigating climate change.

The effects of nitrogen fertilization on N2O emissions from a rubber plantation

Intensive soil-management practices, along with chronic additions of synthetic N fertilizers, mean that rubber plantations are potential N 2 O sources in tropical regions.

Can N fertilizer use efficiency be estimated using

Both N difference and 15 N-based methods have been widely used to estimate NFUE.

Plant-derived nitrogen fertilizers utilize the nitrogen inherent in plants to meet the growth demands of crops. These fertilizers encompass several categories:

1. Organic Fertilizers: Derived from animal and plant residues or organic matter, these fertilizers are formed through microbial decomposition and mineralization. Common examples include farm manure, animal dung (e.g., cow dung, chicken manure), and green manure. Nitrogen in organic fertilizers originates from residual organisms, with relatively low content but sustained nutrient release. They play a critical role in improving soil structure and enhancing soil fertility.

2. Microbial Fertilizers: These fertilizers primarily consist of microorganisms such as bacteria, fungi, and actinomycetes. By decomposing organic matter in the soil, they produce nitrogen and other nutrients, thereby enriching soil fertility. Suitable for various crops, microbial fertilizers accelerate crop growth, increase yields, reduce chemical fertilizer usage, and minimize environmental pollution.

3. Foliar Spray Fertilizers: Applied directly onto plant leaves, these fertilizers rely on photosynthesis to convert nitrogen into absorbable forms. They rapidly replenish nitrogen, boosting growth and yield. Urea, ammonium sulfate, and potassium nitrate are common foliar spray formulations.

4. Root-Zone Fertilization: Administered near plant roots to stimulate root development, this method enhances nitrogen uptake by increasing soil nitrogen levels, subsequently improving crop yield and quality. Urea and potassium nitrate are frequently used in root-zone applications.

5. Water-Soluble Fertilizers: Dissolving readily in water, these fertilizers contain high concentrations of essential nutrients like nitrogen, phosphorus, and potassium. They quickly address nutrient deficiencies, accelerating crop growth and yield. Particularly effective for cash crops and vegetables, they ensure rapid nutrient absorption.

6. Controlled-/Slow-Release Fertilizers: Designed to gradually release nitrogen, these fertilizers cater to crops requiring steady nitrogen supply over time (e.g., rice, wheat). By reducing nitrogen loss and optimizing utilization, they mitigate environmental impact while enhancing efficiency.

7. Biochar-Based Fertilizers: Produced from biomass via high-temperature carbonization, these fertilizers are rich in nitrogen, phosphorus, and potassium. They also improve soil structure and fertility, making them ideal for high-value crops like fruits and tea.

plant-derived nitrogen fertilizers offer diverse options with distinct advantages. To optimize outcomes, farmers should select fertilizers based on crop needs, soil conditions, and environmental factors. Balancing synthetic and organic inputs, along with harmonizing nutrients like nitrogen, phosphorus, and potassium, promotes sustainable agriculture while elevating crop quality and yield.