【摘要】 因地制宜地选择杉木的适生土壤,是提高杉木产量的重要措施。能使杉木丰产的土壤类型是暗红壤和暗黄壤。土壤的物理性质对杉木的生长影响很大,在土壤的总孔隙里,水分和非毛细管孔隙各占一半左右时,对杉木生长最为有利;水、气不协调,会引起杉木的黄化病。在一定的基础上,杉木的生长随土壤有机质的增加而加快,但增加到2％左右时就无显著影响。从大量的调查分析资料看,土壤的矿物质养分含量与杉木生长没有显著的相关性。更多还原

【Abstract】 Chosing the type of soil suitable to the growth of China fir is an essential step to raise output; in this respect the soil types, dark red and dark yellow are considered answering really well. The physical property of the soil has its great impact on the growth of China fir. The most favorable condition of the soil to the growth of China fir is a half and half proportion of the water and non-capillary pore in the total soil pore space; on the contrary imbalanced condition of water and air in the soil will bring China fir to chlorosis. To a certain extent, the growth of the China fir will be speeded up by the increase in soil humus, but no significent difference in the growth of China fir can be observed when the percentage of the soil humus reaches 2%. So far from the data obtained no remarkable correlation between the growth of China fir and the mineral content of the soil has been found.更多还原