摘要
通过对不同开发年限的北方紫色砂页岩退化山场的研究表明,经开发,土壤颗粒组成和土壤水分不断改善,土壤正向着有利于植被生长的方向发育;20～50 cm的疏松层中,有机质、速效养分(N、P、K)含量显著增加;开发后生物量较开发前分别增长了2.48倍(开发4年)和8.74倍(开发7年),有效改善了退化山场的植被状况.
The devolution mountain were studied in different developing years. The result shows that soil granule compositions and soil water are improved continuously, which shows that the soil is developing for vegetation growth in the favourable direction. The organic matter and available nutrients （N, P, K） in soil are increased observably in 20～50 cm soil loose layer. The developing biomass is 2.48 times（developed for 4 years） and 8.74 times（developed for 7 years） than that of undeveloped, which improves remarkably the vegetation status in devolution mountain.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2005年第6期19-22,共4页
Journal of Hebei Agricultural University
基金
河北省自然基金项目(3993173)
关键词
紫色砂页岩
退化山场
生物量
purple sandshale
devolution mountain
biomass
