豫西黄土区造林立地条件类型划分与适地适树研究

正确、合理地划分立地条件类型并选择适宜的树种造林,是营林工作中急需解决的关键技术问题之一。本项研究针对豫西黄土区侵蚀地貌突出、干旱贫瘠的基本特征,在充分汇集本区原有科技资料的基础上,进行了大量、系统的现场调查研究,以土壤水分为主导因子,依地形、土壤条件将豫西黄土区划分为16种立地类型,进而采用刺槐人工林立地指数对其进行了质量评价。在确认其正确、实用的基础上,又进行了各立地类型上大量树种的生长调查分析,从而确定了各立地条件类型适宜的乔、灌木树种及林种,编制了切实可行的豫西黄土区立地条件类型及适生树种表。该表推荐出适宜在本区推广应用的乔木树种22个、灌木种4个、林种4个,建议试验树种10个。

Classification of Afforestation and Study on Selecting Tree Species according to Site Factors of Loess Region in West Henan

Classifying the type of site factor and selecting tree species according to site factors correctly and properly is one of the key technical problems need to be solved urgently in afforestation work. Aiming at the basic char-acteristics of draught, poor and evident eroded landforms of the loess region in west Henan, on the basis of fully collecting the existing materials of the region, this study has made a great deal systematic on-site inves-tigation and evaluated the quality of site factor indexes of locust afforestation, dividing the loess area of west Henan into 16 types of site factors and taking the soil moisture as a dominant factor, based on the conditions of topography and soil. After confirming its correction and practicality, investigation on the growth of tree species of different site factors has been analysed, suitable species of arbor and scrub and forest-type for dif-ferent site factors are decided and a feasible type of site factor and a table of suitable tree species for the loess region of west Henan have been worked out. There are 22 arbor species, 4 scrub species, 4 forest-types and 10 suggested experimental species that are good for popularization and application in the region.