1、Optimizing straw and nitrogen fertilizer resources for low

Previous studies have also shown that adjusting the amount of nitrogen applied to crops based on returning straw to the field can greatly improve nitrogen utilization efficiency and reduce greenhouse gas emissions while maintaining crop yield (Cui et al., 2008; Liu et al., 2021).

2、Effects of Different Nitrogen Fertilizer Rates on Spring Maize Yield

Under the condition of straw returning to the field, appropriate nitrogen fertilizer application is one of the key factors used to improve crop yield and ensure environmental safety.

3、Straw returning combined with suitable amount of nitrogen fertilizer

Combining straw return with an appropriate amount (375 kg/hm 2) of nitrogen can enhance nitrogen absorption and utilization rates, reduce nitrate nitrogen accumulation in the plough layer, and increase soluble, particulate organic nitrogen, and microbial biomass nitrogen content in the 0−40 cm soil layer, significantly improving the effect of ...

Effects of Straw and Nitrogenous Fertilizers on the Soil Aggregate

Specifically, 250 kg ha − 1 nitrogen application under straw return (SRN250) demonstrated an enhancement in soil aggregate organic carbon (SOC) content, leading to improved soil physical attributes and stability within the 0–40 cm soil depth.

Straw returning and nitrogen reduction: Strategies for sustainable

Implementing continue straw returning practices and optimizing nitrogen application can mitigate nitrogen losses and enhance nitrogen use efficiency (NUE) in dryland. 15N-labeled technique offers a robust approach for tracking fertilizer nitrogen fate and assessing nitrogen use efficiency.

Straw Return and Nitrogen Fertilization to Maize Regulate Soil

Straw returning (SR) and nitrogen (N) fertilization influence soil fertility, enzyme activities, and the soil microbial community and structure. However, it remains unclear due to heterogeneous composition and varying decomposition rates of added straw.

Replacing nitrogen in mineral fertilizers with nitrogen in maize straw

Applying an appropriate amount of nitrogen can improve soil fertility and provide sufficient nutrients for plants 1. Water is the medium of nitrogen absorption and transport. Adequate...

Effects of straw returning combined with nitrogen fertilizer on yield

To elucidate the impact of nitrogen (N) fertilizer on spring maize grain yield and quality under different straw returning methods, this study analyzed the pasting and thermal characteristics of maize starch and explored the optimal N fertilizer rate under varying straw returning practices.

Maize Straw and Nitrogen Fertilizer Alter Soil Carbon and Nitrogen

Combining straw with nitrogen fertilizer is an important strategy that influences soil fertility and crop yield. N availability may further affect carbon mineralization (C min) and nitrogen mineralization (N min) in the soil by influencing the microbial decomposition of straw.

Straw returning and reducing nitrogen application rates maintain maize

The region is rich in maize straw, and the total amount of chemical N fertilizer that can be replaced by straw is large (Wang et al., 2021b). At the same time, straw returning can reduce the environmental problems caused by straw burning.

Straw returning is one of the critical measures for sustainable agricultural development. It involves incorporating crop residues (such as rice straw, wheat straw, etc.) into the soil through specific treatments to increase soil organic matter, improve soil structure, and enhance soil fertility. The use of an appropriate amount of nitrogen fertilizer during straw returning is essential for several reasons:

1. Enhancing Soil Fertility: Nitrogen is an essential nutrient for plant growth. Applying an appropriate amount of nitrogen fertilizer replenishes soil nitrogen levels, thereby improving soil fertility and promoting crop development.

2. Stimulating Microbial Activity: Moderate nitrogen fertilization activates soil microorganisms, such as nitrogen-fixing bacteria, phosphate-solubilizing bacteria, and potassium-releasing bacteria. These microbes play a vital role in decomposing straw, converting organic matter into accessible nutrients while releasing nitrogen for plant absorption.

3. Balancing Carbon-Nitrogen Ratio: After straw returning, the soil’s carbon-to-nitrogen ratio changes. Excessive nitrogen can disrupt this balance, harming plants. An appropriate nitrogen dose optimizes the ratio, ensuring efficient uptake of carbon and nitrogen by crops.

4. Reducing Pest and Disease Risks: Moderate nitrogen application suppresses pathogenic microorganisms and strengthens plants’ disease resistance, thereby lowering the incidence of pests and diseases.

5. Boosting Crop Yields: Sufficient nitrogen supports healthy crop growth and development, directly contributing to higher yields by meeting plants’ nutritional needs.

6. Preventing Over-Fertilization Issues: Excessive nitrogen leads to soil acidification, salinization, and reduced crop quality (e.g., excessive vegetative growth, lodging). Controlled nitrogen use avoids these negative impacts.

7. Promoting Ecological Balance: Straw returning aligns with eco-agricultural practices, enabling resource recycling and biodiversity conservation. Proper nitrogen application maintains nutrient equilibrium in ecosystems.

8. Adapting to Climate Change: Scientific nitrogen management helps adjust crop growth patterns, enhancing stress resistance to cope with climatic challenges like extreme weather.

applying an appropriate amount of nitrogen fertilizer during straw returning ensures balanced soil fertility, microbial efficiency, pest control, yield optimization, ecological sustainability, and climate resilience. Scientific fertilization practices are key to achieving green agricultural development and long-term sustainability.