五种灌木种源试验与苗期生长对比研究

本文于乌兰布和沙漠东北边缘，对沙拐枣等５种灌木１１个种源区的苗期生长进行了种源定点试验。同时对５个树种苗期生长的差异也进行了对比分析试验。在９２、９４年进行两个重复观测，通过对高生长量、地径生长量的方差分析，多重比较和ｔ检验的结果表明：各树种最佳种源分别是：花棒、（磴口、民勤）；羊柴：（榆林）；柠条：（民勤、凉城）；梭梭：（磴口）；沙拐枣：（民勤）。各树种高生长的种间排序为：花棒＞沙拐枣＞羊柴＞梭梭＞柠条。地径生长排序为：沙拐枣＞花棒＞羊柴＞梭梭＞柠条。

STUDY ON SEEDLING GROWTH AMONG FIVE SPECIES OF SHRUBS AND THEIR PROVENANCES

Seedling growth of five species of shrubs from eleven proverances was studiedin wulanbuhe Desert,at the same time we compared and analysed the difference of seedlinggrowth,Through the variance analysis,multipe comparison test and T test,the result of twosame studies in 1992 and 1994 was:the best provenances selected as bellow,Hedysarum sco-parium(Dengkou,Cminqin)Hedysartim mongolicum(Yulin),Caragana korshinskii(Min-qin,Liangcheng),Haloxylon ammodendron(Dengkou)and Calligonum mongolicum(Minqin). The sequence of shrubs in height growth as follows:Hedysarum scoparium>Calligonummongolicum>Hedysarum mongolicum>Haloxylon ammodendron>Caragana korshinskii;thesequence in diameter growth was Calligonum mongolicum>Hedysarum swparium >Hedysarum mongolicum>Haloxylon ammodendron>Caragana korshinskii.