| 1. | Determination of forest soil micro - aggregate
森林土壤微团聚体组成的测定 |
| 2. | Compositional proportion of soil characteristic microaggregates and soil fertility evaluation
土壤特征微团聚体的组成比例与肥力评价 |
| 3. | They play important roles in the circulation of soil materials , development of soil , formation of soil micro - structure , improvement of soil physical and chemical properties , and the maintenance of soil living community
它们在土壤物质循环、土壤的发育及其微团聚体的形成、土壤理化特性和土壤生物群落的维护等诸多方面都发挥了重要作用。 |
| 4. | After wet sieving , water stable aggregate showed the highest fraction at the size of < 0 . 25mm , while micro - aggregate was distributed from 0 . 25mm to 0 . 01mm size . aggregate stability of soils increased with an increased clay content
土壤水稳性团聚体的粒级分布( psd )均以0 . 25mm居多，土壤微团聚体的粒级分布则以0 . 25 - 0 . 01mm粒级为主。 |
| 5. | The breakdown of soil aggregates was the premise of soil erosion , and dispersion ratio explained the stabilization of soil aggregates of six experimental soils , which was calculated by the content of micro - aggregates
以微团聚体含量为基础计算的分散率，说明了六种供试土壤团聚体的稳定性，第四纪粘土红壤团聚体稳定，花岗岩红壤团聚体较易破坏。 |
| 6. | The chemical analysis of the soil extracted solution has shown that the soluble salt in the soil is predominated by the divalent ions ca2 + and mg2 + which mean that the soil aggregates have been chemically stable during the field experiment
同时，对土壤浸剂液的化学成分的分析结果表明，浸提液中二价的钙、镁离子占优势，这使土壤微团聚体处于一种化学稳定的状态。 |
| 7. | The results of different particle size aggregates showed that , the curve of splash erosion of aggregates of < 0 . 25mm was slowly ascending during the rainfall process , whereas , according to > 0 . 25mm , the curve was ascending during prophase of rainfall , then descending
不同粒度团聚体的溅蚀实验表明， 0 . 25mm的微团聚体，其溅蚀率历时曲线呈缓慢降低的态势；而0 . 25mm大团聚体，则是先升高再降低。 |
| 8. | The results showed that straw returning had not significantly increased the content of organic matter except for the treatment b . the treatments of straw - returning had a tendency to decrease the bulk density of soil in a no significant manner , thus increased the porosity of soil
实验室内对土壤微团聚体的分析还表明，随着稻草的施入，土壤的微团聚化程度得到了提高，但全量整株还田处理与其它处理之间差异很小。 |
| 9. | Utilization methods influenced aggregation degree of microaggregate of purple soil , the aggregation degree were in such order : grassland > forestland > garden plot > cropland , aggregation degree of microaggregate in soil developed from jas group was least , and that of j3s group was maximal
紫色土微团聚体团聚度受利用方式影响较大，团聚度次序表现为草地林地园地耕地，沙溪庙组发育土壤微团聚体的团聚度最低，遂宁组最高。 |
