干旱荒漠区沙地云杉育苗技术及幼苗生长规律研究

目的]研究沙地云杉在干旱荒漠区的育苗技术及幼苗生长规律。方法]将供试种子用不同方法处理后播种,采用3种苗床设计和3种播种密度的随机区组设计进行育苗试验。结果]播种前用冷水浸种处理种子,育苗苗床选择高床,播种量采用中密度,有利于提高出苗率和保苗率,且能够显著降低病害发生率。幼苗的年生长规律表现为：高生长从6月进入快速生长期,地径生长从6月20日进入快速生长期,地径生长滞后于苗高生长约20d,到7月苗高生长和地径生长趋于平缓,至8月苗高生长和地径生长趋于停止。相关分析表明,影响地径和苗高生长的主要环境因子为最低气温和20、15、10cm土层的土壤温度。结论]该研究为沙地云杉在干旱荒漠区的推广种植提供了技术支持。

Study on the Seedling Raising Technique and Seedling Growth Regularity of Picea mongolica in Arid Desert Areas

Objective]The purpose was to study the seedling raising technique and seedling growth regularity of Picea mongolica in arid desert areas.Method]The tested seeds were treated by different methods before sowing,the randomized block design with 3 seedbed designs and 3 sowing density was used in seedling raising experiment.Result]The measures of soaking seeds in cold water before sowing,selecting high seedbed and middle sowing density for seedling raising were favorable to enhancing seedling emergence rate a...