1.Key Lab.of Soil & Water Conservation and Desertification Combating,Ministry of Education,Beijing Forestry University,100083,Beijing;2.College of Resources and Environment,Northwest A & F University,712100,Yangling,Shaanxi;3.Forestry Bureau of Huanglong Mountain,715700,Huanglong,Shaanxi;4.Institute of Germ Plasm Resources,Academy of A & F Science of Ningxia,750002,Yinchuan,Ningxia: China
Abstract：In order to determine effective gap manner and intensity,effects of relative light intensity and soil water content,the artificial gaps of 2 kinds were studied.The results indicated that daily relative light intensity in leafing and shooting date at fish scale pit surface in closed shrub stand was 44.54%,but less than 10% in growth season;the values in strip-shaped gap were 76.38%,71.92% and 65.70% in the middle of Apr.,in late June and in late Oct.,respectively. The relative light intensity were more than 80% in the early morning(08:00—11:00),and less than 50% in strong sunny hours(13:00—15:00) in growth season,specially.That is advantageous to photosynthesis and avoiding from sunstroke for seeding.The soil water content in strip-shaped gap was more than anyone in shrub in growth season.The strip-shaped gap is efficient to regulating relative light intensity and raising soil water content.
薛智德<sup>1,2</sup>； 张乾功<sup>3</sup>； 朱清科<sup>1</sup>； 陈卫平<sup>1,4</sup>. 灌丛内人工林窗的相对光照强度和土壤水分条件[J]. 中国水土保持科学, 2008, 6(4): 54-58.
XUE Zhi-De-； Zhang-Gan-Gong-； Shu-Qing-Ke-； Chen-Wei-Beng. Relative light intensity and soil water content in different gaps of shrubbery caused by human disturbances. SSWCC, 2008, 6(4): 54-58.
2008, Vol. 6 
