Growth, nutrient allocation and water relations of mesquite (Prosopis chilensis) seedlings at differing fertilization schedules

摘要: Abstract Effects of contrasting fertilization schedules on biomass and nutrient partitioning between different plant organs, the water relations Prosopis (mesquite) seedlings were studied in greenhouse over a 13 week rotation to assess nutritional preconditioning short term drought. The received 200 mg N per as complete solution during growing season supplied either conventionally (as single dose or repeated top dressings) exponentially pure modified increasing additions). Although mode did not influence total dry matter production seedlings, distribution organs affected. Proportionally more was allocated leaf components than fertilized plants. This trend reversed, however, root growth relatively distributed roots conventional exponential schedules. Despite stems accounting for about half mass, relative macronutrient contents lower most nutrients leaves. On other hand, phosphorus concentration higher leaves seedlings. At end rotation, well-irrigated exhibited stomatal conductance transpiration throughout course day. Induced drought, decreased both diurnal transpiration. same day, drought also altered patterns all treatments except plants which maintained opening