不同雨强条件下黄土性土壤养分流失规律研究  

RESEARCH ON NUTRIENT LOSS FROM A LOESSIAL SOIL UNDER DIFFERENT RAINFALL INTENSITIES

作　　者：康玲玲[1] 朱小勇[1] 王云璋[1] 吴卿[1] 魏义长[2] 

机构地区：[1]黄河水利委员会黄河水利科学研究院,郑州450003 [2]河南农业大学,郑州450002

出　　处：《土壤学报》1999年第4期536-543,共8页Acta Pedologica Sinica

基　　金：中科院;水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室基金!10501-34

摘　　要：本文利用室内人工降雨模拟装置，通过坡面小区试验，初步分析了不同雨强条件下黄土性土壤养分流失的规律。结果表明：土壤养分主要是以不溶态的形式随泥沙迁移，随径流迁移的可溶态养分很少；不同形态的养分在泥沙中有富集现象；养分流失量与雨强成正比；同一雨强条件下，土壤流失量与养分流失量呈显著的正相关关系。With a simulated rainfall equipment, the pattern of soil nutrient loss from a loessial soil under different rainfall intensities was preliminarily studied by plot test on a sloping surface. Results showed that soil nutrients mainly migrated with sediment in unsoluable forms, while the amounts of soluble nutrients removed with runoff were very little. The different forms of nutrients were enriched in sediment. The amounts of nutrient loss were in direct proportion to rainfall intensity. There was significant positive correlation between the amounts of soil loss and nutrient loss.

关 键 词：室内人工降雨 雨强 黄土性土壤 养分流失 

分 类 号：S158.3[农业科学—土壤学] S156[农业科学—农业基础科学]