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对 2 0 0 0 ,2 0 0 1年营造的南洋楹幼林随冬季气温变化的冻害情况进行了调查 ,并在冻害发生后对受害植株采取了不同的补救措施。结果表明 ,南洋楹幼树的耐寒性较差 ,其抗寒性随林龄的增长而有所增强 ,1年生幼树在气温为 5℃左右时 ,就有可能遭受冻害 ,当有霜冻或 0℃以下的低温持续时间较长时 ,幼树可能会全株冻死 ;2年生幼树的抗寒性较强 ,在气温降到 - 3℃左右时 ,植株受害程度仍较轻。在冻害发生后 ,及时采取适当的补救措施如截干、培土、抚育、施肥等 ,可促使受害植株提早萌芽生长 ,恢复成林 ,降低损失。
To investigate the frost damage of the young Nanyangsai plantations in 2000 and 2001 with changes in winter temperature, and take remedial measures on the affected plants after the frost damage happened. The results showed that the cold hardiness of young saplings was poor, and its cold resistance increased with age. The young saplings were likely to suffer frost damage when frost or 0 When the duration of low temperature below ℃ is longer, the whole plant may freeze to death; the cold resistance of 2-year-old saplings is strong, and when the temperature drops to -3 ℃, the degree of damage of the plant is still slight. After the frost damage occurs, timely and appropriate remedial measures such as cutting dry, earth training, tending, fertilizing and so on, can prompt the victimized plants to germinate and grow early, restore the forest and reduce losses.