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对生长在酸雨及大气污染严重危害地区、轻度危害地区和未受危害地区三种条件下马尾松的木材化学性质和基本密度的对照研究表明，生长在受危害地区试材的心、边材生材含水率比在未受危害条件下生长的树木分别低３０％和２２％左右；基本密度与未受危害的树木无明显的差异。酸雨及大气污染危害对木材的化学性质有较为明显的影响，主要表现在：生长在受危害地区试木中的抽提物和木素含量高；而α－纤维素含量则比生长在未受危害地区的试材约低１％至３％；在严重危害条件下生长的试材中组成纤维素的葡萄糖比在受轻度危害和未受危害条件下生长的试材约低２％；在受酸雨和大气污染条件下生长的树木中的纤维素相对结晶度比在来受危害条件下生长的树木含量约低８％。在受危害严重地区生长的试材中的钾、钠、钙、镁、铝、铁、钛和锌的含量高于在轻度危害和未受危害地区生长的试材。其中铝和铁的含量比未受害地区的试材高一倍多，锌的含量高近三倍。生长在受酸雨和大气污染严重地区的试材各年轮中的淀粉和游离糖含量均低于生长在未受危害地区的试材。
The control study on the wood chemistry and basic density of Pinus massoniana grown under the conditions of acid rain and severe air pollution, lightly endangered and unaffected areas showed that the growth of the wood from the damaged heartwood and sapwood The moisture content of wood was 30% lower and 22% lower than that of the trees grown unaffected, respectively. There was no significant difference between the basic density and the unharmed trees. Acid rain and air pollution hazards on the chemical properties of the wood have a more significant impact, mainly in: growing in the affected area of the test wood extract and lignin content is high; and α-cellulose content than the growth in the unaffected Approximately 1% to 3% less material was tested in the hazard area; glucose content in the test material grown under severe conditions was about 2% lower than that in the test material grown under lightly and unsanctified conditions; The relative crystallinity of cellulose in trees grown under conditions of acid rain and atmospheric pollution is about 8% lower than that of trees grown under conditions of harm. The contents of potassium, sodium, calcium, magnesium, aluminum, iron, titanium and zinc in the test material grown in the severely affected area were higher than those in the areas grown in the mild and non-hazardous areas. Aluminum and iron were more than twice as much as those in uninhabited areas, with nearly three times the zinc content. The growth of starch and free sugars in the annual rings of test materials grown in acid rain and severe air pollution areas were lower than those grown in non-hazardous areas.