湿地松人工林造林整地与抚育方式效应分析与评价

4年生湿地松人工林造林整地与抚育试验观测结果表明：整地规格对湿地松幼林成活率没有显著影响，而抚育方式对湿地松幼林成活率有极显著影响，以穴状和带状抚育幼林成活率最高，为92.15%，而对照仅为82.17%。整地规格、抚育方式及二因子的交互作用对湿地松胸径、树高生长量没有显著影响，通过对整地、抚育方式湿地松生长量分析，结合经济评价，丘岗地湿地松造林以中穴整地、穴状和带状抚育为宜。幼林抚育能明显提高林地肥力，并且抚育强度越大，林地肥力恢复与提高越快；抚育能减少林地被种类、多度及盖度。

Effective analysis and appraisals of the soil preparation and tending methods in afforestation of the plantation of Pinus elliottii

The analysis was based on the tending experiments of soil preparation in afforestation of plantation of the four ages Pinus elliottii The research results showed that the soil preparation standard was not very effective in improving the survival rate of the seedlings of Pinus elliottii The tending method was very effective in the survival rate of the seedlings The tending methods of the hole planting and brand planting were especially effective and the survival rate using those methods was 92 15%,the survival rate not using those methods was only 82 17% The soil preparation standard,tending methods and using the two factors alternately were had very effect on the diameter breast height and tree height increment Based on the analysis of soil preparation,tending methods and increment of Pinus elliottii and an economic analysis.The most effective tending methods to afforestation of pinus elliottii in hills were soil preparation in middle hole planting and brand planting The tending methods can increase the fertility of the forestland,and the greater the increase in tending the greater the increase in increment and renewal of the fertility of the forestland The tending can drcrease the varieties abundance and vegetation cover in forestland