造林前用双吉尔—GGR6号植物生长调节剂对华北落叶松苗进行浸根处理，可提高造林成活率和林木生长量。
The seedlings of L. principis-rupprechtii, treated by means of root soaking in GGR6, would be beneficial to raise survival rate for afforestation and to increase growth rate.
研究表明，随着溶液P素浓度的升高，马尾松各参试种源的苗高生长、P素吸收总量均有不同程度的增加，但其变化因种源而异。
The results indicated that height growth and the amount of P uptake increased diversely with phosphorus raise for the provenances tested.
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