多效抗旱驱鼠剂(RPA)对飞播油松幼林空间格局影响  

Effect of RPA on Spatial Patterns of Pinus tabulaeformis for Initial Stages of Aerial Seeding Afforestation

作　　者：李建春[1,2] 孔绿玉 张斌善 黄海英 左明明 韩崇选[1] 

机构地区：[1]西北农林科技大学鼠害治理研究中心,陕西杨陵712100 [2]陕西省飞机播种造林工作站,陕西西安710082 [3]汉中市森林病虫害防治检疫站,陕西汉中723000 [4]商洛市山阳县飞机播种造林工作站,陕西商洛726000

出　　处：《西北林学院学报》2015年第2期51-58,共8页Journal of Northwest Forestry University

基　　金：国家林业公益性行业专项(201404405);国家林业局重点项目(2012-02)

摘　　要：空间格局反映了种群生物学特性、种内种间关系以及环境异质性等因素的综合作用。通过对陕西4个地市1997年飞播油松成苗期空间格局研究证明,RPA和对照区油松均呈聚集分布。其中,RPA处理油松聚集对密度依赖性较高,环境异质性对聚集度作用较小;而对照聚集对密度依赖性较低,环境异质性的影响较大。飞播造林初期,油松密度高,油松具有均匀分布的趋势;随着林木增长,油松密度降低,林内油松聚集度逐渐增强。但由于RPA促进了苗木抗逆性,有苗样方频度和苗木保存量明显提高,聚集度较低。而对照有苗样方大量减少,油松分布相对集中,聚集度增强,均匀度降低。表明RPA拌种可有效降低飞播后油松分布聚集程度,扩大油松在林地适宜生存范围,提高林地利用率。The spatial pattern（SP）was the result of integrated effects of the factors of population biological characteristics,the intra-and inter-specific interactions and the environmental heterogeneity.The SP of Pinus tabulaeformis plantations in their seedling formation period was examined,which were planted by aerial seeding in 1997 in four areas in Shaanxi.During the aerial seeding,the seeds were treated by RPA or without RPA（control）.The differences in SP of the two treatments were compared.The results demonstrated that the both SP exhibited aggregation distribution.The aggregation of RPA treatment demonstrated higher density dependence,while environmental heterogeneity presented lower influence on the aggregation.The aggregation of the control however,demonstrated lower density dependence,environmental heterogeneity presented higher influence on the aggregation.In the initial stage of aerial seeding,the density was high,and the distribution tended to be even.The density decreased with the time,and the aggregation degree gradually increased.Because RPA treatment promoted the seedling resistance,the frequent-ness of sample plots with available seedlings and the quantity of available seedling were significantly improved,aggregation degree was low.While in the control,the frequentness of sample plots with available seedlings significantly reduced,aggregation degree increased,uniformity reduced.It was concluded that the RPA treatment could effectively reduce the aggregation degree of P.tabulaeformis in aerial seeding,expanded the growth range of Pinus tabulaeformis in forest land,and improved land utilization.

关 键 词：多效抗旱驱鼠剂 飞播造林 油松 空间格局 

分 类 号：S718[农业科学—林学]