论文部分内容阅读
通过对浙江，福建的主要毛竹产区的林下土壤，对１７２个剖面采用典型调查的方法，采集各类土样８３３个进行有效硅含量的测试，初步阐述了该区毛竹林土壤有效硅的含量状况、地理分布特征；说明土壤有效硅具有从南到北逐渐递增的纬度地带性规律和随海拔从低到高，土壤有效硅含量逐渐增多甚至骤增的垂直地带性规律。在三大类岩石中，一般火成岩（本调查中花岗岩类和高海拔区凝灰岩除外）发育的土壤有效硅含量较低，沉积岩则高，变质岩则由于其来源和变质作用的复杂性而使其发育土壤的有效硅状况呈现不规律性。在各土壤类型中，其有效硅含量顺序为：山地黄壤＞石灰性土）山地黄棕壤＞山地红壤≥黄红壤＞酸性紫色土≥低丘红壤。对特征剖面研究发现，客土和劈山等毛竹林栽培措施对有效硅在土壤剖面分布有较大的影响。本研究结果绘制的该区有效硅低值含量分布图，可以为纸浆竹林基地的选择提供初步的建议。
Based on the soil under the forest in the main bamboo producing areas of Zhejiang and Fujian Provinces, a total of 172 sections were surveyed by a typical survey method, and 833 samples of various soil samples were collected to test the effective silicon content. Content and geographical distribution of soil available silicon. It shows that the effective silicon in the soil has a regular pattern of latitude zonal increasing gradually from south to north and a vertical zonal law of increasing or even increasing rapidly with the elevation of soil from low to high. Among the three major types of rocks, the available silicic content of normal igneous rocks (except the granites and tuffs in the high-altitude area in this survey) is relatively low while the sedimentary rocks are high, while the metamorphic rocks are due to the complexity of their source and metamorphism The available silicon status of developing soils is irregular. In all soil types, the order of available silicon content is: yellow soil of mountainous area> limestone soil) yellow brown soil of mountainous area> red soil of mountainous area> yellow-red soil> acidic purple soil> red soil of low hill. The characteristics of the profile study found that the soil and bamboo and other bamboo cultivation measures of effective silicon distribution in the soil profile has a greater impact. The results of the study of the effective low silicon content of the distribution map of the region, the choice of pulp bamboo forest provide preliminary advice.