闽楠-杉木混交林生长和土壤特性研究  

Study on Growth and Soil Characteristics of Phoebe bournei-Cunninghumialanceolata Mixed Forest

作　　者：刘杰 翟学杰 夏昕 Liu Jie;Zhai Xuejie;Xia Xin(Hunan Jinghui Agriculture and Forestry Ecological Technology Co.,Ltd.,Changsha 41000,Hunan,China)

机构地区：[1]湖南景辉农林生态科技有限公司,湖南长沙410000

出　　处：《绿色科技》2024年第7期111-113,123,共4页Journal of Green Science and Technology

摘　　要：基于闽楠野生种群的衰退现状,对闽楠进行人工培育繁殖的研究已刻不容缓,混交林是当前森林经营的主要手段。以闽楠与杉木混交为例,对其生长和土壤特性进行了研究。结果表明:混交林内,闽楠与杉木相对纯林树高有16.7%和12.7%的增长幅度,胸径为6.5%和6%,冠幅为12.5%和9.5%,枝下高为25.0%和20.0%;闽楠生物量为77.7 t/hm 2,比纯林高43.1%;杉木为55.7 t/hm 2,比纯林高36.2%;混交林中闽楠、杉木的叶量分别比纯林高17.2%、3.2%,叶绿素含量分别比纯林高18.9%、7.1%,更有利于光合作用;闽楠、杉木叶子养分中N含量分别较纯林高1.9%、5.7%,K 2 O含量分别较纯林高34.4%、5.3%,P 2 O 5、CaO和MgO含量混交林与纯林基本相等;混交林土壤中有机质及其他养分含量均高于纯林,其中混交林土壤有机质相对闽楠纯林增加了32.0%,全N、全P、速效P、K分别提高了23.1%、19.4%、3.8%和2.3%。闽楠与杉木混交能有效提高闽楠的生长状况,并改善土壤特性,有利于闽楠的生长发育。Based on the decline of the wild population of Phoebe bournei,research on artificial cultivation and reproduction of Phoebe bournei is urgent,and mixed forests are currently the main means of forest management.This paper takes the mixed forest of Phoebe bournei and Cunninghumia lanceolata as an example to study its growth and soil characteristics.The results show that the height of the trees in the mixed forest of Phoebe bournei and Cunninghumia lanceolata is 16.7%and 12.7%higher than that of the pure forest.The diameter at breast height is 6.5%and 6%higher.The crown width is 12.5%and 9.5%higher,and the height under the branches is 25.0%and 20.0%higher,respectively;The biomass of Phoebe bournei is 77.7 t/hm 2,which is 43.1%higher than that of pure forests;The Cunninghumia lanceolata is 55.7 t/hm 2,which is 36.2%higher than the pure forest;In mixed forests,the leaf yield of Phoebe bournei and Cunninghumia lanceolata is 17.2%and 3.2%higher than that of pure forests,and the chlorophyll content is 18.9%and 7.1%higher than that of pure forests,which is more conducive to photosynthesis;The nitrogen content in the leaves of Phoebe bournei and Cunninghumia lanceolata is 1.9%and 5.7%higher than that of the pure forest,respectively.The K 2 O content is 34.4%and 5.3%higher than that of the pure forest,and the P 2 O 5,CaO,and MgO content in the mixed forest and the pure forest are basically the same;The content of organic matter and other nutrients in the soil of mixed forests is higher than that of pure forests.Among them,the organic matter of mixed forests increased by 32.0%compared to pure forests of Phoebe bournei,and respectively the total N,total P,available P,and K increased by 23.1%,19.4%,3.8%,and 2.3%.The mixture of Phoebe bournei and Cunninghumia lanceolata can effectively improve the growth of Phoebe bournei,and improve the soil characteristics,which is conducive to the growth and development of Phoebe bournei.

关 键 词：闽楠 杉木 混交林 生长 土壤特性 

分 类 号：S795[农业科学—林木遗传育种]