Assessment of the Nitrogen and Potassium Fertilizer in Green Bean Irrigated with Disinfected Urban Wastewater

作者：Segura M L; Contreras Paris Juana Isabel; Maria Plaza Blanca; Lao M T

来源：Communications in Soil Science and Plant Analysis, 2012, 43(1-2): 426-433.

DOI：10.1080/00103624.2011.638604

• Dry matter
• fertigation
• macronutrients uptake
• NK rates
• sand mulch

Green bean Helda in autumn cycle (118 days) was grown under greenhouse conditions in sand-mulched sandy loam soil. The crop was irrigated with disinfected urban wastewater (DUW) obtained from ozone from the Almer a Purifying Plant. The average nutrient parameters of DUW were 0.4 mM of nitrate (NO3-), 2.1 mM of ammonium (NH4+), 0.8 mM of potassium (K+), and electrical conductivity (EC) 1.6 dS m(-1). Three different treatments were established: DUW without additional fertilization (F-DUW), DUW with fertilization until the recommended rate was obtained (10.0 mM of N and 3.4 mM of K) (F-NK), and DUW with fertilization until 1.5 F-NK rate (15.0 mM of N and 5.1 mM of K) (F1.5NK) was obtained. The dry-matter production was not conditioned by the fertilizer level. Treatments F-NK and F-1.5NK showed the greatest yield and uptake of N and K independent of the fertilizer level. The most nitrogen (N), calcium (Ca), and magnesium (Mg) were in the leaf, phosphorus (P) was high in fruit, and K was similar in leaf and fruit. With regard to the macronutrient absorption efficiency, the F-1.5NK treatment showed the least N and K efficiency and the greatest soil salinity.

• 出版日期2012