鲁中南贫瘠荒山直播造林技术研究

STUDY ON SEEDING AFFORESTATION TECHNOLOGY FOR BARREN MOUNTAIN IN THE MIDDLE -SOUTHERN SHANDONG PROVINCE

在鲁中南低山丘陵区选择青石山和砂石山设立两处试验地、4个区组，开展了侧柏、黑松等8个树种贫瘠荒山直播造林技术研究，结果表明：供试树种均能用于荒山大面积直播造林，提前整地和施用土壤保水剂都能显著地提高直播造林的出苗率、保存率和苗木生长量，研究了两种立地条件下侧柏、刺槐直播造林土壤保水剂最佳施用剂量，覆草和间苗定苗亦能明显提高直播造林的出苗率和苗木生长量．

The study was conducted on the bluestone and gravel mountains in low hilly area of the middle- southern Shandong Province. The seeding aftorestation technology study on barren mountain of 8 tree species such as Platycladus orientalis and Pinus thunbergii was undertaken for two sample plots including four blocks. The results suggested that 8 tested tree species all can be used for seeding afforestation of large areas of barren mountain. The emergence rate, retention rate and growth of seeding afforestation can be significantly improved by preparing soil in advance and using soil water-holding agent. The best-applied dosage of soil water-holding agent for seeding afforestation of Platycladus orientalis and Robinia pseudoacacia in the two kinds of site conditions were studied. Mulching with straw and cutting out the seedlings can also improve the emergence rate and growth significantly.