菜地土壤评价中参评因素的选定与分级指标的划分

菜地选片规划应通过土壤详查和评价工作,选出最适地区,才能经济有效、持续发展。土壤评价中参评因素的选定与分级指标的划分是工作的核心。应选取对蔬菜的生长发育和生产力具有重大影响的、稳定性较高的限制因素,并以土壤属性为主,结合环境条件,因地制宜选定。参评因素的分级应尽量采用定量指标,为分等定级提出定量依据,其主要级差应尽量利用有生物学意义的临界指标。在目前全国无统一规定下,试图面向全国选定参评因素及划分为五等六级的分级指标。

Parameters Selection for Evaluation of Vegetable Soil Quality and its Gradation

Survey and Evaluation of soil quality are basic work for vegetable production and soil management, in which selection of parameters and determination of gradation indexes are the most important. For parameters selection, the stable factors, strongly affecting vegetable crop growth and production must be taken firstly, and other environmental conditions should also be considered. While for determination of gradation indexes we mainly applied quantifiable indexes and established a series of critical points biologically. This paper systematically introduces parameters and indexes for evaluation of vegetable soil quality in China.