不同保护措施对青海云杉幼苗安全越冬的影响

Effects of Different Protecting Measures on Overwintering Safely of Picea crassifolia kom Seedlings

在青海云杉育苗中,研究了幼苗冬季不同保护措施覆盖树叶、麦草、地膜和沙土对冠层温度和湿度、苗木成活率和生长量的影响。结果表明:幼苗覆盖不同保护措施能够提高其冠层温度和湿度,其苗木成活率和生长量均有提高。其中,覆盖树叶的苗木成活率和生长量最高,2013~2015年成活率分别为85.81%、89.25%和95.42%,较对照CK分别提高了73.53、70.71和74.19个百分点,苗高、针叶数和主根长分别为14.06cm、13.60个/株和16.55cm,较对照CK分别提高了7.24cm、6.50个/株和8.30cm,差异均达到极显著水平。

The effects of different protecting measure with covering leaves,ryegrass,film and soil on crown tem- perature and humidity,survival ratio and growth were studied in winter of Picea crassifolia kom growing seedlings. The result showed that survival ratio and growth of covering leaves were the highest in all treatments, the survival ratio in 2013-2015 were 85.81%,89.25% and 95.42% respectively,which increased 73.53percentage point,70.71percentage point and 74.19 percentage point compare to CK,the seedling height,quantity of needles and principal root height were 14.06cm,13.06/plant and 16.55cm respectively,which increased 7.24cm,6.50/plant and 8.30cm compare to CK,all differences were reached extremely significant level（P〈0.01）.