论文部分内容阅读
利用 18个喜树地理种源的 5 40株 1年生苗木作试验材料 ,分析了苗期各器官生物量及其相关规律。研究结果表明 :各器官生物量 (烘干 )所占比例为 ,干 2 9.5 4% ,枝 9.2 0 % ,叶 30 .75 % ,根 2 2 .74% ,皮 7.77% ,其中以叶片所占比例最大 ;参试的 18个种源中 ,以 4号福建、8号和 9号江西、11号和 12号湖南种源生物量较大 ,其中以 8号江西南昌种源总生物量和叶片生物量为最大。建立了用苗高 ( H)和地径 ( D)估测叶片生物量 ( m1)和总生物量 ( m2 )的数学模型 ,用 m=a Db Hc,m=a Dbe CH +d/H ,m=a+D2 ( b+c H+d H2 )和 m=D2 / ( a+b D+c D2 ) 4个数学模型 ,尤其用 m=D2 / ( a+b D+c D2 )数学模型能较准确估测 m1和 m2 。
A total of 50 40-year-old seedlings of 18 Camptotheca acuminatum provenances were used as experimental materials to analyze the biomass of organs at seedling stage and their correlations. The results showed that the biomass of all organs (drying) accounted for 2 9.54%, 9.2 0%, 30.75%, 22.74% and 7.77% Among the 18 provenances, the biomass of Hunan provenances was higher in No.4 Fujian, No.8 and No.9 Jiangxi, and No. 11 and No12 in Hunan. Among them, the total biomass and leaves The largest biomass. A mathematical model was established to estimate leaf biomass (m1) and total biomass (m2) with height (H) and diameter (D) The mathematical models of m = a + D2 (b + c H + d H2) and m = D2 / (a + b D + c D2) Can more accurately estimate m1 and m2.