摘要
土壤肥力是制约高寒半于旱栗钙土区农业持续发展的关键因子。采用野外调研和田区培肥定位试验相结合的方法，应用相关分析、逐步回归、主成份分析等多元数理统计原理，建立了该区栗钙土土壤肥力评价指标体系。研究表明：蔗糖酶、易氧化碳、速效氮、速效磷、阳离子代换量、＜０．０１ｍｍ的物理性粘粒、重组碳、原上复合量 ８个指标是反映耕层土壤肥力的“体质”指标；剖面第二层的＜０．０１ｍｍ物理性粘粒、碳酸钙含量以及表土层厚度是反映上体构型状况的主要“体型”指标，两者共同构成了该区土壤肥力指标体系。
Soil fertility is a key factor that restricts the sustainable development of agriculture in cold highland-semiarid area in this paper. The soil fertility index system of chestnut soil was founded. In the founding course, field investigation and field located fertilication test and multivariate statistical analysis were applied. The result showed that invertase activity, active organic carbon, available N, available P(P2O5), CEC, physical clay (<0.01 mm ), heavy fraction carbon and undisturbed soil complex quantity were as the indexes to indicate the soil matrix of plough layer. The physical clay (<0.01mm), CaCO3 content and thickness of epipedon in the second layer of the profile were as the indexes to indicate the soil configuration. All these indexes formed the soil fertility index system in the area.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
1999年第4期27-33,共7页
Journal of Hebei Agricultural University
基金
国家"九五"重点科技攻关项目!96-004-04-03
关键词
高寒半干旱区
栗钙土
土壤肥力
指标体系
Cold highand-semiarid area
Chestnut soil
Soil fertility
Index system
