Effects of polyacrylamide on germination and growth of several plant seeds

The tests of germination and growth on the seeds of 8 herbaceous and fruticose plants(Medicago sativa，Settria viridis，Hippophae rhamnoides et a1．)treated with polyacrylamide(PHP)at different concentrations show that PHP can promote the germination of the seeds for Kummerowia striata，Hippophae rhamnoides，Medicago sativa，Meliloeus suaveolens at 0．1～1．Og／kg of the rate．It can also promote the germination of the seedlings and length of the roots except that individual treatment has less inhibition．PHP form ulations may obviously inhibit the growth of roots of Lespedeza dararica seedlings at 0．5g／kg of the rate，and may also inhibit the germination of the seeds for Vitex chinensis．PHP may not only express the most significantly and notably inhibition to germination of Themedatriandra Forsk var japnica Makino，Setria viridis，but also significantly promote or has less inhibition to the height of the seedlings and the length of the roots，regardless of the rates．