越冬期几种覆盖措施对库尔勒香梨树干保温遮荫效果分析

采用稻草、麻绳、反光膜、涂白4种物理保温遮阴措施,动态监测越冬期间香梨树干在各种措施下的树干形成层温度,对比分析了不同覆盖措施的保温遮阴效果。结果表明,4种措施遮荫效果大小顺序为:稻草>反光膜>麻绳>涂白>对照,而保温效果大小顺序为稻草>麻绳>反光膜>对照>涂白,稻草的日较差最小,保温遮荫能力最强,可作保温材料;使用浅颜色的覆盖材料可降低香梨树干形成层温度变化幅度,从而降低树体受越冬伤害的可能性;离地面越近的树干越容易受到低温和强光的交错伤害。

Analysis on Effect of Several Covering Measures on Korla Fragrant Pear Tree Trank in the Over-wintering Period

The four physical heat preservation and shading measures:rice straw,hemp lope,silver reflective film and lime wash were used to dinamically monitor the temperature of Korla Fragrant Pear tree trank cambium under different treatments during the over-wintering period and heat preservation and shading effect with different coverage measures were compared and analyzed.The results indicated that the shading effect of four measures showed following sequces:rice straw>silver reflective film>hem lope>lime wash>CK;however,the effect of heat preservation showed following sequences:rice straw>hem lope>silver reflective film>CK>lime wash;The temperature different of day and night of rice straw was the lowest,and its heat temperature and shading ability was the strongest,it can be used as local heat temperature materials;The coverage materials with light color can decrease the change extent of cambium temperature of Fragrant Pear tree trank,thereby,can decrease possibility of damage of tree body by overwintering;The closer to the ground,the easier the tree trank was damaged by the combination of low temperature and strongh light.