沙质海岸防护林体系土壤营养分析

通过对沙质海岸防护林体系前沿的草带、灌木带、基干林带、经济林种植带、农田林网、梯田地埂水土保持林和山地丘陵水源涵养林等7部分的土样养分含量测定,结果表明:不同区域立地土壤及层次肥力存在显著差异,全氮在整个海防林体系中含量很低;速效氮在草带灌木带和基干林带含量较低,而在其他带含量则较高;速效磷在基干林带、经济林种植带和农田林网土壤中含量较高;速效钾含量除草带外总体变化不大;有机质含量普遍较低。

Analysis of Soil Nutrition of Protection Forest System on Sandy Coast

The nutrition content were determined on soil samples of grass belt and shrubbery belt and main belt and planting belt of non timber product forest and farm forest belt and soil and water conservation forest in terrace ridge,water conservation forest in hilly land.Results showed that soil of different regional site and fertilizer had significant differences.The content of total nitrogen was much low in all the oceanic protection forest system.The content of available nitrogen was lower in grass belt and shrubbery belt and was higher in other belts.The content of available phosphorous was higher in main belt and planting belt of non timber product forest and farm forest belt.The content of available potash had little change except grass belt.The content of organic matters was commonly lower.