山桐子苗木质量分级标准研究  

Study on Grading Standard of Idesia polycarpa Maxim.Seedling Quality

作　　者：李婷 余水 冯德宾 黄锐 陈斌 苏万楷 何超 张玉林 柯兰姿 LI Ting;YU Shui;FENG Debin;HUANG Rui;CHEN Bin;SU Wankai;HE Chao;ZHANG Yulin;KE Lanzi(Sichuan Forest and Grass Seedling Station,Chengdu 610081,China;Linshui county Wanfeng mountain state-owned Forest Farm,Linshui 638500,China;Sichuan Zhonghaimao Agricultural Development Co.LTD,Chengdu 610016,China;Chengdu University of Traditional Chinese Medicine,Chengdu 611130,China)

机构地区：[1]四川省林草种苗站,四川成都610081 [2]领水县万峰山国有林场,四川邻水638500 [3]四川中海茂农业开发有限公司,四川成都610016 [4]成都中医药大学,四川成都611130

出　　处：《四川林业科技》2022年第4期129-133,共5页Journal of Sichuan Forestry Science and Technology

基　　金：四川主要造林树种苗木质量分级(DB51/T 705);标准修订项目(202102/T044)。

摘　　要：以盆周边缘山地和四川盆地2个育苗自然类型区内苗龄0.3-0.7的山桐子播种苗为研究对象,测定其苗高、地径、主根长、Ⅰ级侧根数4个指标。采用“正态分布法”和“K-均值聚类法”进行分级研究,指出山桐子苗木质量分级采用正态分布法更符合生产实际。结合国家和省级标准相关要求,对分级结果进行拟合修正,最终分区域将山桐子苗木质量划分为2个等级。盆周边缘山地:Ⅰ级苗苗高>59 cm、地径>0.75 cm、主根长>15 cm、Ⅰ级侧根数>6根,Ⅱ级苗苗高36 cm~59 cm、地径0.45 cm~0.75 cm、主根长≥12 cm、Ⅰ级侧根数≥4根;四川盆地:Ⅰ级苗苗高>52 cm、地径>0.65 cm、主根长>15 cm、Ⅰ级侧根数>5根,Ⅱ级苗苗高30 cm~52 cm、地径0.35 cm~0.65 cm、主根长≥11 cm、Ⅰ级侧根数≥3根。The seedlings of Idesia polycarpa Maxim.with seedling age of 0.3-0.7 in the two naturaleedling raising types of marginal mountains around Sichuan Basin and Sichuan Basin were used as research object.The four indexes of seedling height,ground diameter,main root length and number of grade I lateral roots were measured.Using“normal distribution method”and“K-means clustering method”to study the classification,it is pointed out that the normal distribution method is more in line with the production practice.Combined with the relevant requirements of national and provincial standards,the classification results were fitted correction,and the quality of Idesia polycarpa Maxim.seedlings was finally divided into two grades by region.Marginal mountains around Sichuan Basin:Grade I seedling height>59 cm,ground diameter>0.75 cm,taproot length>15 cm,number of grade I lateral roots>6,grade II seedling height 36 cm~59 cm,ground diameter 0.45 cm~0.75 cm,taproot lengt≥12 cm,number of grade I lateral roots≥4;Sichuan Basin:Grade I seedling height>52 cm,ground diameter>0.65 cm,taproot length>15 cm,number of grade I lateral roots>5,grade II seedling height 30 cm~52 cm,ground diameter 0.35 cm~0.65 cm,taproot length≥11 cm,number of grade I lateral roots≥3.

关 键 词：山桐子 苗木质量 分级 正态分布法 聚类法 拟合修正 

分 类 号：S792.99[农业科学—林木遗传育种]