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在很多干燥地区和碱性钙质土壤,缺铁失绿给果树带来严重减产。缺铁引起叶脉间失绿和叶片坏死。降低营养生长和产量,严重时造成全株死亡。为控制果树缺铁失绿采用了多种方法,包括土壤施用或叶片喷布及树干注射铁化合物,这些方法取得了不同程度的成功。土壤施用铁有时能有效地防治失绿,但铁在钙质土壤中变成无效铁;叶片喷铁也可减轻失绿,但只有短期作用,为保持树体健壮,丰产需经常重复使用。
In many dry areas and alkaline calcareous soil, the loss of iron from green to fruit trees to bring serious cuts. Iron deficiency causes chlorosis and leaf necrosis between the veins. Reduce vegetative growth and yield, cause severe death of whole plant. Various methods have been used to control iron deficiency and chlorosis in fruit trees, including soil application or foliar spray and trunk injection of iron compounds, which have achieved varying degrees of success. Soil application of iron can sometimes effectively control the loss of green, but the iron becomes invalid iron in calcareous soil; leaf spraying iron can also reduce the loss of green, but only short-term effects, in order to keep the tree robust, high yield should be often reused.