农用地利用集约度与昆虫传粉服务之间的关系研究

Research on the Relationship Between Intensity Level of Agricultural Land Utilization and Insect Pollination Services

【目的】研究农用地利用集约度与昆虫传粉服务之间的定量关系,为农用地集约利用提供有价值的决策依据。【方法】以广东省市域农用地为研究对象,选取4种不同传粉依赖度的典型农作物,基于长时间序列(2000-2015年)统计数据,利用回归分析方法分析各自集约度水平与其产量之间的关系,进而探索农用地集约水平与传粉服务的定量关系。【结果】(1)就作物产量而言,当作物的传粉依赖度越大时,随着集约度的提升作物产量呈下降趋势越明显;而当作物的传粉依赖度较小时,随着集约度的提升作物产量呈上升趋势。(2)就作物产量变异性而言,当作物的传粉依赖度越大时,随着集约度的提升,其产量变异性系数变大,即产量越不稳定。【结论】农用地集约利用水平的提升,并不一定带来作物产量的提升和产量的稳定性,而明显受限制于作物的传粉依赖度。

【Objective】The quantitative relationship between intensive degree of agricultural land utilization and pollination service was studied,which provided valuable decision basis for intensive utilization of agricultural land.【Method】Taking agricultural land in various cities of Guangdong Province as the research object,four typical crops with different pollination dependence were selected.Based on the statistical data of long time series(2000-2015),regression analysis was used to analyze the relationship between the intensity level of agricultural land and its yield,to further explore the quantitative relationship between the intensity level of agricultural land and pollination service.【Result】(1)As far as crop yield is concerned,when the pollination dependence of crops is greater,the crop yield shows decreasing trend much obviously with the increase of intensity level.However,when the pollination dependence of crops is smaller,the crop yield tends to increase with the increase of intensity level.(2)As far as crop yield variability is concerned,the greater the pollination dependence of crops is,the greater the coefficient of yield variability increases with the increase of intensity level,that is,the more unstable the yield is.【Conclusion】The improvement of intensive utilization of agricultural land does not necessarily lead to the increase of crop yield and the stability of crop yield,but is obviously restricted by the pollination dependence of crops.