Research on the improved effect of grassland desertification salinity-alkalinity by vibration deep loosening integration technology

摘要

In recent years, following with the environmental changes, estrepement, and overgrazing, the grassland desertification area of song-nen plain extended year by year with increasing rate of 1.5 ∼ 2%, ecological environment was continuously deteriorated, regional economy of farming and animal husbandry sustainable development was restricted. According to the alkaline desertification of the different area soil and their causes, soil improvement and adjust water resource were proposed as starting point, using vibration deep loosening as the core to improve alkaline desertification grassland, assisted by the integration technology of modifier and agronomic measures. The experimental datas showed that: with the integration technology, soil salinity, potassium and sodium content, PH value, penetrating resistance, bulk density had decreased more than 18% than control area, permeability and porosity had been respectively improved 25 times and 35.8%. The species richness index and diversity index is only 0.1753 and 0.4899 before improvement, they had been respectively increased 7.0 times and 2.8 times than control area, evenness index was increased to 0.8442 from 0.7068.