黄土高原主要土壤污染物对紫花苜蓿的影响

紫花苜蓿是一种富含各种营养成分的优质饲草,其抗病性强,利用年限长,黄土高原一带是我国紫花苜蓿种植面积最大的地区。近年来随着油田的开发及农、工业活动的加强,大量的污染物进入土壤系统,主要土壤污染物(石油、镉、锌、铅)改变紫花苜蓿的细胞代谢、生长发育以及形态结构,降低了紫花苜蓿的产量和品质。本文对土壤污染物的特点、污染物对紫花苜蓿的作用机理、防治和应对的措施进行了论述。

The impact of the major soil pollutants on alfalfa in the loess plateau

Alfalfa is a kind of high quality forage which rich in various nutritive components,it had strong disease resistance and the utilization periods is long.The Loess Plateau was the largest Alfalfa planting region in China ,recently years,with the oil field exploitation and agriculture and factory activities strengthen,a lots of pollutants entered soil system,the four major soil pollutions (oil,cadmium,zinc,and lead) changed the cellular metabolism and growth and morph structure of Alfalfa,reduced the quality and biomass of alfalfa.This paper discussed the characteristics of soil pollutants,mechanism on alfalfa and prevention and control measures.