不同土地利用方式对土壤有机质和氮含量的影响研究

通过对广西桂林毛村岩溶区和非岩溶区的林地、灌草丛地、果园(人工柚子林和银杏林)等土壤的测定分析,研究了不同土地利用方式对土壤有机质和氮含量的影响,结果表明:在相同土地利用方式条件下,岩溶区的土壤有机质、全氮和碱解氮含量大都高于非岩溶区;在不同土地利用方式条件下,岩溶区土壤有机质、全氮和碱解氮含量表现为林地》灌草丛地》柚子园》银杏园,而非岩溶区土壤的各项指标差异较大、规律不明显.

Analysis of soil organic matter and nitrogen under different land use types

A study was made of soil carbon and nitrogen contents of karst areas and non-karst areas in Maocun,Guilin of Guangxi province.And they were collected in topsoil in forest lands,arable lands and fruit lands,respectively.The results showed that: the content of soil organic matter,total nitrogen and available nitrogen in karst areas was higher than that in non-karst areas,with the same land use types.The results also showed that: in karst areas,the content of soil organic matter,total nitrogen and available nitrogen in sequence from forest land,arable land and fruit land.However,in nonkarst areas,they were different from that in karst areas,the rule was not obvious.