草畜系统下盐碱荒地土壤生物化学性状演变过程的研究

Study on the Evolutional Process of Soil Biochemical Properties of Saline-alkali Wastelands in the Grass-livestock Systems

以宏观调控和微观监测的方式研究了环渤海盐碱荒地建立草畜系统后土壤理化性状、生物化学性状的演变规律及调控机理。结果表明，环渤海盐碱荒地经过工程治理、翻压二季田菁建立草畜系统5～7年后，土壤肥力指标达到当地四至二类耕地水平。

Experiments conducted to study the changes of the physical chemistry and biochemistry properties of seashore saline soils along Bohai sea where the grass -livestockhad been established. The results showed that, based on the engineering harness andturning down sesbania for two times,the establishment of the grass-livestock system for5~7 years, the indexes of soil fertility would amount to that of local cultivated soils,namely grade Ⅳ,Ⅲ or Ⅱ in the cultivated lands.