样方面积和数量对沙柳生物量精度的影响  

Effects of Area and Number of Sample Plot on the Accuracy of Biomass for Salix psammophila

作　　者：朱灵益[1] 杨忠信[1] 党兵[1] 李金昌 李杰 于九如[3] 韦少敏[3] 陈震[3] 

机构地区：[1]中国林业科学研究院林业研究所 [2]陕西省榆林地区治沙所 [3]天津大学管理工作系

出　　处：《中国沙漠》1992年第4期60-63,共4页Journal of Desert Research

摘　　要：为了研究沙柳(Salix Psammophila)灌木种生物量的调查,本文设置了300m^2、200m^2、100m^2、50m^2、10m^2五种样方面积。研究结果,选用100m^2样方面积,其精度达到0.95以上,其调查样方数量比其它样方面积都少。如果调查对象是矮小灌木种,调查样方内又有10株以上的植株,则可采用10m^2样方面积,这样虽然调查样方数量比100m^2面积要增多,但工作效率和经济效益都能达到预期效果。In order to study the biomass of Salix pasmmophila f iveexperiments using Salix psammophila, five different areas of sample plots, namely 300m2, 200m2, 100m2, 50m2, and 10m2 were designed. The results showed that when the plot is 100m2 in area the precision could exceed 0. 95. The plot numbers surveyed are less than other ones. If the shrublets are surveyed and there are over 10 shyublets in the plot, 10m2 of sample plots would he used. In such a case, the numder of sample plot surveyed increased but the labour efficiency and the economic benefit are high.

关 键 词：生物量 样方 面积 沙柳 精度 

分 类 号：S727.29[农业科学—林木遗传育种]