Don't use nitrogen (N) fertilizer when alfalfa is seeded in medium or fine-textured soils. In these situations, the application of N fertilizer may reduce nodulation. Small amounts of N fertilizer may enhance establishment when alfalfa is seeded in coarse-textured soil.

2019年2月22日 · Nitrogen fertilizer is rarely needed for a healthy alfalfa field. Alfalfa is a legume crop that can “fix” its own nitrogen requirements. Most prairie soils are low in naturally occurring nitrogen-fixing bacteria.

Alfalfa gets adequate nitrogen supply from its symbiotic relationship with nitrogen fixing Rhizobium bacteria. The average hectare of alfalfa will fix about 1100 lbs. (500 kg) of nitrogen per year. (Keep in mind that 1 ton = 1000 kg = 2.200 lbs. and 1 hectare = …

2025年1月23日 · This study found that 10 t hm − 2 biochar combined with 94 kg N hm − 2 nitrogen achieved maximum alfalfa yield. Nitrogen fertilizer increased alfalfa CP content in 2023 and under B2 (20 t hm − 2) in 2022, as well as RFV by reducing NDF content. This may result from initially low soil nitrogen levels in the test area after three years of ...

2022年8月1日 · In arid regions, water and nitrogen are the two most limiting factors for sustainable pastoral production systems. In this study, we determined the potential effects of irrigation and nitrogen application on forage yield, nutritive values, and resource use efficiency of alfalfa in arid agro-climatic conditions.

2024年1月10日 · Therefore, the appropriate amount of water and fertilizer input can increase alfalfa resource use efficiency, yield, quality, and economic benefits, and the W 2 N 2 treatment is the best water and N fertilizer combination for alfalfa cultivation under subsurface drip irrigation, which can save 25% water and reduce N input by 33% compared with ...

2023年2月20日 · Soil salt stress is one of the most limiting factors for alfalfa yield and quality, through its inhibition of nitrogen (N) uptake and N fixation. Methods: To understand if N supply could improve alfalfa yield and quality through increasing N uptake in salt-affected soils, a hydroponic experiment and a soil experiment were conducted.

2013年5月28日 · Nitrogen (N) fertilizer is generally not required for alfalfa production since alfalfa can obtain its own N from N-fixing nodules (Figure 1). Alfalfa fixes most (70-90%) of its N needs from the air through Rhizobium bacteria residing in alfalfa root nodules (Figure 1).

selection of the proper fertilizer, application rate, timing and placement, economics, record keeping, and environmental con-siderations. This chapter serves as a guide to alfalfa fertilization in the arid and semi-arid alfalfa production regions of the world, which include the Sacramento, San Joaquin, and Imperial Valleys

2021年1月12日 · Soil salinity is deleterious for the growth and biological N 2 fixation of alfalfa (Medicago sativa L.), but nitrogen fertilization has been beneficial in some cases. This study was conducted to investigate the potential benefit of N fertilization on alfalfa growth and N 2 fixation under saline conditions.