1、Late nitrogen fertilization improves cotton yield through optimizing

Abstract Cotton (Gossypium hirsutum L.) production efficiency is constrained by issues such as a low nitrogen (N) utilization rate (30–35 %) and high N application rate (300–350 kg ha −1) in particular arid climates, such as Xinjiang, the largest irrigated cotton-producing region in China.

2、Nitrogen Fertilization on Cotton

Apply 1/4 to 1/3 of the recommended N at planting and the remainder at sidedress. The preplant or at planting N application is critical for getting the crop off to a good start and ensuring adequate N nutrition prior to side-dressing.

3、(PDF) Role of proper management of nitrogen in cotton growth and

Large quantities of nitrogen (N) fertilizer applied to cotton cropping systems support high yields but cause adverse environmental impacts such as N2O emission and water eutrophication.

4、Cotton Fertility

The reason that N fertilizer recommendations are so difficult to make for a cotton crop is because total N applied is less important than the correct amount of N in all phases of plant growth and fruit development.

5、Long

Long-term N application experiments in Xinjiang showed that applying N to sandy loam cotton fields can effectively increase the STN, which decreases with increasing soil depth (Kaiyong et al., 2011).

Nitrogen use efficiency in cotton: Challenges and opportunities against

Farmers rely heavily on N over-application to boost cotton output, which can result in decreased lint yield, quality, and N use efficiency (NUE). Therefore, improving NUE in cotton is most crucial for reducing environmental nitrate pollution and increasing farm profitability.

Biofertilizer application improved cotton growth, nitrogen use

Biofertilizers increase cotton yield by enhancing cotton biomass and N utilization. Irrigation with saline water can reduce the cotton fiber FQI. Saline water irrigation presents a potential solution for addressing freshwater shortages. However, this practice can result in salinity stress for cotton plants.

Effect of Liquid Nitrogen Fertilizers on the Increase of Cotton

In addition, the effect of liquid nitrogen fertilizers on an increase in the elements of cotton yield and fiber quality has been studied, and the optimal norms for their recommendation to production have been determined.

(PDF) Liquid nitrogen fertilization on the yield and phenologic

This technique provides higher profitability of the produced cotton in relation to the conventional application of the N solid fertilizer via soil.

Improving cotton productivity and nitrogen use efficiency through late

We hypothesized that under the lower fertilization regime of 240 kg N ha -1, adjusting the proportion of N fertilizer in the early and late growth stages can not only optimize the canopy structure and improve the root-shoot relationship but also delay plant senescence and maintain high yield.

Application of Chelated Liquid Nitrogen Fertilizer in Cotton

Chelated liquid nitrogen fertilizer is a highly efficient and environmentally friendly nitrogen fertilizer. It combines nitrogen with multiple microelements and nutrients through chelation technology, enhancing nitrogen utilization. In cotton production, this fertilizer serves as an effective solution to improve growth rates, yield, and fiber quality. Below is a detailed guide on its application methods and precautions.

I. Application Methods

1. Base Application Apply chelated liquid nitrogen fertilizer as a base fertilizer before sowing or transplanting. Determine the dosage (typically 20–30 kg per mu) based on soil fertility and cotton growth requirements. This ensures adequate nutrient supply for early development.

2. Topdressing During the growing season (from jointing to flowering), apply 5–10 kg per mu every 7–10 days. Mix the fertilizer with water and irrigate or spread evenly. Adjust dosage according to soil conditions and cotton growth stages.

3. Foliar Spraying Enhance nitrogen absorption by spraying diluted chelated liquid nitrogen fertilizer directly onto cotton leaves. Use 1–2 kg per mu, adjusted based on growth stage and soil fertility. This method promotes rapid absorption and efficient utilization.

II. Precautions

1. Soil Conditions

   • Suitable for all soil types, but avoid excessive pH in alkaline soils (test soil pH before application).
   • Conduct soil tests to ensure optimal conditions for nutrient absorption.

2. Integration with Organic Fertilizers

   • Combine with organic matter (e.g., compost) to improve efficiency.
   • Avoid overapplication to prevent nitrogen accumulation and environmental pollution.

3. Environmental Factors

   • Reduce dosage or adjust timing in humid, rainy, or high-temperature conditions, as excessive soil moisture may hinder absorption.

4. Cotton Variety Selection Choose cultivars adapted to local climate and soil conditions, as nitrogen requirements vary by variety.

5. Timing

   • Base fertilizer: Apply prior to sowing.
   • Topdressing/foliar spraying: Time during key growth stages (jointing, flowering, etc.) for maximum effect.

Chelated liquid nitrogen fertilizer boosts cotton growth, yield, and quality when used correctly. Prioritize soil testing, balanced nutrition, and environmental adaptability to ensure optimal results while minimizing ecological risks.