外源铜作用下土壤脲酶活性与缓冲性及时间关系的模型研究  

Study on Model of Relationships among Soil Urease Activity Buffer and Time by Effect of External Copper Source

作　　者：陈会明[1] 马耀华 和文祥 朱铭莪 

机构地区：[1]西北农林科技大学生命科学学院 [2]资源与环境学院,陕西杨陵712100

出　　处：《西北农业学报》2000年第3期59-62,共4页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家自然科学基金资助! (编号 :3 93 70 148)

摘　　要：添加外源铜条件下 ,土壤脲酶活性是土壤缓冲性及时间 2个因素的函数。土娄土、黑垆土脲酶活性与时间及土壤缓冲量之间的关系为二元线性回归方程。土娄土、黄绵土、黑垆土脲酶活性变化率与时间及土壤缓冲速率之间的方程为 :时间的非线性阻尼振动方程和土壤缓冲速率线性方程的复合形式。黄褐土脲酶活性变化率与时间及缓冲速率之间的关系为 :时间的三次抛物线方程与土壤缓冲速率的一元线性方程的复合形式。这组方程的建立 ,从理论上揭示出脲酶活性不仅能反映污灌土壤受污染的程度 (缓冲性大小 ) ,而且能反映出污灌土壤受污染过程 (时间的长短 )Soil urease activity was initially regarded as the function of two factors: buffer and time under the addition of external copper source. The equation among Lou soil and Heilu soil urease activity and time and their buffering values is quadratic linear regression equation.The equation among Lou soil、Loess soil and Heilu soil urease activity rate and their buffering rate and time is combination of the two sections, one is nonlinear damped vibration equation for time, the other is linear equation with one unknown for soil buffering rate. The above equation about Yellow cinamon soil involved two sections too, one is cubic parabolic equation for time, the other is linear equation with one unkonwn for soil buffering rate. The group equations revealed that soil urease activity not only can show the polluted dersee (buffering value) of polluted soil, but also can show the process(time) in which soil is polluted in theory. Those can provided aids for soil biological scientific and environmental supervising workers in practice. [WT5HZ]

关 键 词：土壤脲酶活性 土壤缓冲性 污灌区 重金属 铜 

分 类 号：S153.4[农业科学—土壤学]