砧木苗的肥害与防治在果树的育苗和砧木苗的栽培过程中，由于用肥不当，往往容易产生肥害。兹就肥害症状及防治方法介绍如下。一、产生肥害的原因和症状：碳酸氢铵、尿素和氨水等化肥，极易分解产生氨气，在浓度达到一定程度时砧苗就会产生肥害。产生肥害的主要原因是氨气... Rootstock seedling fertilizer and prevention and control In the nursery of fruit trees and rootstock seedlings in the cultivation process, due to improper use of fertilizer, often prone to fatal injury. Here are fat symptoms and prevention methods described below. First, the causes of fat and symptoms and symptoms: Ammonium bicarbonate, urea and ammonia and other fertilizers, easily decomposed ammonia, at a certain level of concentration will produce fertilizer seedlings. Produce fertilizer is the main reason for ammonia ...