本栏刊出应用保水剂提高造林成活率的报道后,读者来函希望对保水剂予以介绍。我们根据农业部环能司提供的技术资料,简介如下。 This column contains a report on the application of water-retaining agents to improve the survival rate of afforestation. The reader’s letter would like to introduce the water-holding agent. We are based on technical information provided by the Department of Energy, Ministry of Agriculture, briefings are as follows.