不同郁闭度橡胶林间作豆科植物对土壤肥力的影响

对不同郁闭度橡胶林下间作豆科绿肥植物与纯作橡胶园土壤化学性质进行研究。结果表明,间作豆科绿肥植物的林下土壤p H、含水量、有机质、全氮和碱解氮、速效磷和速效钾含量均明显高于其对照纯作林,间作豆科绿肥植物有利于提高胶园的土壤肥力水平。中郁闭度林土壤有机质、全氮和碱解氮含量高于高郁闭度林,但p H、速效钾和速效磷含量低于高郁闭度林。

The Effects of Intercropping Legumes on Soil Chemical Properties in Different Canopy Density Rubber Plantation

Taking pure rubber plantation as control, soil chemical properties of different canopy density rubber plantation intercropping legumes were studied. The results showed that the soil pH, water content, organic matter, total N and alkali-hydrolysable N, available P and available K content of different canopy density rubber plantation intercropping leguminous green manure were significantly higher than control, and intercropping legume could improve soil fertility level. Soil organic matter, total N and alkali-hydrolysable N content in the middle canopy density of rubber plantation were higher than high canopy density of rubber plantation, but soil pH, available K and available P content were lower than high canopy density.