The Research On The Effect Of Site Conditions On The Growth And Benefits Of Cyclobalanopsis Glauca

Cyclobalanopsis glauca plantation as Siming Mountain forest distribution wide, large area of rare species, the mountain water conservation, windbreak and sand fixation and forest ecological system formation and maintenance plays an irreplaceable role. The Siming Mountain Forest Farm in Qidong as study sites, by standard investigation method of site conditions on Cyclobalanopsis glauca plantation into effects of growth and understory vegetation diversity and tries to find out the variation, and for future local forestry workers to take appropriate measures for operation and management of the existing oak plantations provide theoretical reference. The main conclusions are as follows:(1) Slope positions and influence growth two site the main factor of Cyclobalanopsis glauca plantation. Slope of Cyclobalanopsis glauca plantation diameter at breast height, tree height, under branch height has a significant effect and no significant effect on the crown. There was a positive correlation between them. Slope position of Cyclobalanopsis glauca artificial crown width effect significantly, there was a positive correlation among them; slope position of Cyclobalanopsis glauca plantation diameter at breast height, tree height, under branch height had a significant effect, between them showed negative correlation. The slope and elevation of high impact oak plantations Cyclobalanopsis DBH and tree height, crown and branches are not significant.(2) Growth in shady position of Cyclobalanopsis glauca forest is slow at first period is short, fast growing period long; grow in sunny slope, the upper of Cyclobalanopsis glauca forest is slow at first period is long, fast growing period is short, growth in the semi shady oak growth cycle in between. Overall, Siming Mountain Forest Farm of Cyclobalanopsis glauca plantation growth fast-growing tree time period for 6-18 age, diameter at breast height of 7-20 age, volume for 17-35 age.(3) Slope of Cyclobalanopsis glauca under the artificial forest, shrubs and herbaceous species number s, Simpson index D, Shannon Wiener index H, Pielou uniformity index JSI and JSW, the diversity index of the influence is the largest; elevation of shrub and herb species number s, Shannon Wiener refers to the number h, slope position of shrub of Simpson index D, Pielou uniformity index JSW effect. Slope of shrubs and herbs of the diversity indices were not significantly affected.(4) Different site conditions of Cyclobalanopsis glauca plantation economic benefits should be significantly, Cyclobalanopsis glauca plantation to 43 years, for example, shady lower Cyclobalanopsis glauca plantation 43rd Annual felling to obtain the total income per hectare 518632 yuan, a profit of 436557.2 yuan; half shady slope in a Cyclobalanopsis glauca artificial Lin Di 43 years old principal felling obtained total income per hectare 378752 yuan, a profit of 315853 yuan; total income sunny upper Cyclobalanopsis glauca artificial Lin Di 43 years felling per hectare 312560 yuan, profit 258735.2 yuan. Profits from the large to small respectively in a shady position and semi shady slope, sunny position, which shady position profit is semi shady slope of 1.38 times, is 1.69 times higher than that of sunny slope position.