牧草间作对桉树人工林下土壤酶活性的影响

目的]研究牧草间作对桉树人工林下土壤酶活性的影响。方法]试验地内以桉树人工林林龄2年为第一代林，选用5种牧草种植区的土壤样品作为人工林地间供试材料，行带内杂草地土样作为对照，采用随机区组设计，在每个区组中选3个取样点，每个取样点挖剖面，测定土壤含水量、蔗糖酶、过氧化物酶和脲酶活性。结果]桉树人工林地间作牧草以后，有效提高了林下土壤含水量；蔗糖酶活性测定中糖蜜草样地的蔗糖酶活性提高幅度最大，达到73．92％；网脉臂形草样地的次之，为46．85％；脲酶活性测定中网脉臂形草样地的脲酶活性提高到19．11％，GC1581柱花草和糖蜜草样地的也有显著提高，分别是10．07％和8．43％。结论]牧草间作能有效改善桉树人工林地土壤理化性状，提高土壤肥力，有效减缓土壤衰退。

Study on the Effect of Forage Intercroping on the Soil Enzyme Activity under Eucalyptus Plantation

Objective] The research aimed to study on effect of forage intercroping on soil enzyme activity under the eucalyptus plantation.Method] With the 2year-old eucalyptus plantation as the first generation forest in the experimental field,the soil sample from the areas planting 5 kinds of forage were selected as the tested materials in the plantation lands.With the soil samples in the weed ground of row belt as CK,the random block design was used and 3 sampling points were selected in every block.The profile w...