摘要
研究了徐淮平原农田防护林树木根系对土壤中蔗糖酶、碱性磷酸酶、脲酶和蛋白酶活性的影响，得到如下结论：（１）在林带附近土壤酶活性较高，距林带较远处酶活性较低，根际土土壤酶活性大于非根际土；（２）各土壤酶活性的垂直变化规律比较复杂，蔗糖酶和碱性磷酸酶活性自上而下逐渐减小，尤其是蔗糖酶急剧下降，脲酶和蛋白酶活性变化幅度较小；（３）树木根系，尤其是根径小于１ｍｍ的吸收根和细根数量的增加，能够显著提高土壤酶的活性。
This paper mainly deals with the characteristics of soil enzyme activities and the influence of tree root system on soil enzymes. The conclusions are as follows:(1)The relationship between the soil enzyme activities is close. The soil enzyme activities near the shelter forest are much stronger than those in the farther place. (2)The vertical variation rules are complex,the activities of invertase and alkaline phosphatase are on a decline from the surface soil to deep soil. Near the shelterforest,the activities of urease and protease are the highest at 0～10 cm and 20～40 cm respectively whereas in the farther place their values decline from the surface to deep soil. The enzyme activities of rhizosphere soil are stronger than those of non rhizosphere soil. (3) Tree root system,especially the root the diameter of which is thinner than 1 mm,could remarkably increase the soil enzymes activities.
出处
《林业科学研究》
CSCD
北大核心
1996年第6期620-624,共5页
Forest Research
关键词
农田防护林
根系
根际
土壤酶活性
shelter forest, root system, rhizosphere, soil enzymes activity
