Both genetic error of main and lateral root number was bigger than that of environmental error, and their repeat was 95% and 87% respectively.

主根平均根数和侧根平均根数两个性状的遗传方差均大于环境方差，其重复力分别可达95%和87%。

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The correlations between seedling height, diameter at base, main root length, lateral root number and root range were analysed according to statistical principles.

根据统计学原理对一年生苗木苗高、地径、主根长、侧根数、根幅的测量数据进行了相关性分析。

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GGR can promote the development of cotton roots like rhizogenic powder. It can also help seedling height, the number of lateral roots, root dry weight, boll weight and boll number per plant.

双吉尔（GGR）象生根粉一样都能促进棉花根系的发育，对增加苗高、侧根数、根干重、铃重、单株结铃数均有一定的促进作用。

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