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土壤有机质含有的营养元素种类多,能均衡长久地供给果树生长发育所必需的全部营养元素,防治缺素症。有机质能促进土壤团粒结构的形成,增加土壤透气性,提高土壤的保肥保水能力和缓冲性能,减少元素的固定。有机质的有效养分释放慢,有利于果树根系的吸收,对环境造成的污染少。国家无公害苹果技术规程要求,果园土壤有机质含量要在1.5%以上,最好达到5%~8%。土壤有机质缺乏是果树产量低、品质差、抗逆性差的主要原因。改良土壤
Soil organic matter contains many types of nutrients, can be a long time to supply all the nutrients necessary for the growth and development of fruit trees, prevention and treatment of deficiency. Organic matter can promote the formation of soil aggregate structure, increase the permeability of soil, improve soil conservation and water retention capacity and buffer performance, and reduce the elemental fixation. The effective release of organic nutrients slow, is conducive to the absorption of fruit tree roots, causing less pollution to the environment. National pollution-free apple technical requirements, orchard soil organic matter content of 1.5% or more, preferably up to 5% to 8%. The lack of organic matter in the soil is the main reason for poor fruit yield, poor quality and poor resistance. Improve the soil