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Water conservation forest in the improvement of the ecological environment, especially in water conservation, flood storage to maintain soil and water conservation, flood control, plays an important role in purifying water quality and conservation of water resources, more and more people pay attention to water conservation forest. Bamboo is endemic to China, the most important economic bamboo species pubescens has a huge canopy, thick litter the physical layer and tangled roots network, as well as the porous forest soils above features make Mao Zhucheng excellent water conservation plants. Bamboo Huitong County of Hunan pubescens of the research object, the system of the region's water conservation research. The study results show that: 1. Conjunction with the presence of non-capillary porosity County soil of different forest types significantly disparities, mixed fir Moso bamboo forest, the Phyllostachys followed, fir minimum. This is because on the one hand the bamboo rhizome and root penetration ability, fine root development, interspersed around different depths within the soil to form a criss-crossing network of roots, and promote soil pore formation; fir Moso bamboo, on the other hand, mixed forest to improve the woodland soil structure, loose soil, increase soil porosity. Soil water storage capacity of different forest types fir Moso bamboo mixed forest than fir forest is 81.08% larger than pubescens large 11.81%. Tree height and diameter differences significant impact on soil non-capillary porosity, soil layer depth of its impact is significant. Its significance level of 0.01. . Moso bamboo organ size sort of aboveground biomass for the stalk gt; branches gt; leaf biomass allocation in four age classes: age class gt; 4 age class gt; 2 age class gt; 1 age class 3 age bamboo monoclonal highest biomass 41.599kg. Total biomass and the biomass of bamboo poles, a gradual increase of the age, showing an upward trend, branches, leaves, root biomass age gradually increase downward trend. In each age class, stalk biomass is a major component of the biomass. 3. Moso bamboo factor biomass correlation indicates heavy bamboo DBH, height rod sticks weight, root dry weight, total biomass has great relevance, while a poor correlation with bamboo leaves, bamboo, bamboo bamboo because annual leaves less moisture, three or four years more foliage on biomass with age and branches under a high correlation larger. In conjunction with the bamboo each organ biological amount by ① The W = a × Db × Hc ② The W = a × (D2H) b ③ The W = a bD cH ④ W = a (D 1) bHc above the four model carried a fitting, draw a model of a model, model IV, the three models fitted well to DBH, bamboo high stalk weight, root dry weight, total dry weight of the relationship between the fitting equation correlation coefficients are very significant level, but the four models small correlation coefficient of the leaf weight and heavy branches fitting relation described fitting equation can not be used for estimation leaf biomass. Select the root biomass fitting better model. 4 non-capillary porosity and root biomass relationship model: linear equation: F = -0.007 0.035 × W; quadratic equation: F = 0.106-0.076 × W 0.022 × W2 composite curve model: F = 0.028 x 1.488 W; power curve model F = 0.040 × W0.814; growth curve F = e (-3.568 0.397 / W); Index Model F = 0.028 × e0.397W, each correlation coefficient reached 0.8 or more, indicating the accuracy of the fit higher. Root biomass model previously established in the measured per plant of Moso bamboo or stand average DBH and tree height premise, which can calculate the monoclonal Moso bamboo and stands non-capillary porosity, in turn, can be calculated of monoclonal stands Water Conservation capabilities. Therefore, as long as the know bamboo DBH and tree height, and can model to calculate the water conservation capacity of the bamboo. Moso bamboo roots aspect distribution in the soil, on the one hand, directly increases the woodland soil capillary porosity, on the other hand increase the organic matter content of the soil due to the metabolic activity of the roots, the soil structure is more conducive to subtle water, so the root biomass woodland soil water conservation function is very important, therefore, during water forest tree species selection should root is rich as important to consider the parameters.
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