海岸带不同林农复合经营模式的生物生产力研究

Studies on Biomass Productivity of Three Different Agroforestry Models in Seacoast Area

研究了江苏沿海滩涂较具代表性的银杏采叶园 (A)、银杏果 -叶 -农复合园 (B)、银杏材 -农复合园 (C)的生物生产力。结果表明 :各模式内不同作物个体生长存在极显著差异 ,银杏个体生长情况可用W =aXb 数学模型描述。植物器官生物量和生产力均以茎 (干 )最大。同一模式内 ,农作物生物量和生物生产力高于银杏 ,但收获指数低于银杏。三大模式中 ,模式C具有较高的生物量和生物生产力 ,但与B相差不显著。模式B。

The biomass productivity of three different kinds of typical agroforestry models,namely,the model of Ginkgo biloba leaf utilization garden (A),the model of Ginkgo biloba leaf and fruit utilization crop garden (B) and the model of Ginkgo biloba wood utilization crop garden (C),commonly practiced in the seacoast area in Dongtai City of Jiangsu province,were studied.The results were as follows:(1)The difference of individual crop growth are significant or extremely significant and the growth of Ginkgo biloba can be estimated by regression equations W=aX b.(2)The biomass productivity are highly partioned to wards plants bole and shoots,meanwhile, the bioproductivity of crop are higher than Ginkgo biloba in the same model,but the harvest index are lower than Ginkgo biloba .(3)The model C has the highest bioproductivity in three models,but the difference is not significant in comparision with model B.(4)The model B and C,having high accumulative total LAI and optium microclimate surroundings,have higher bioproductivity.