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[目的]揭示岩性土壤与杉木生长的关系,为系统培育杉木速生丰产林奠定基础。[方法]采用实验生态学的方法,通过方差分析,对6类不同岩性发育的土体上11年生杉木生长和生物量进行研究。地上部分生物量的测定采用皆伐实测法,即逐株砍伐并分别测定其树干(带皮)、树干(去皮)、树枝(带皮)和叶的鲜重,按形态学部位分上、中、下分别取干(去皮)、皮、枝和叶的样品,测定含水率,然后换算成各自的干重,累计即得地上部分的总生物量;地下部分生物量指的是根系生物量,其测定方法采用全株挖掘法,取平均木大、中、小根系的混合样测定含水率,后换算成干重。生物量含水率的测定均采用烘干法。[结果]6类不同岩性发育的土体对杉木的高、径生长及生物量效应影响不同,其中,长石石英砂岩平均树高为523.270 cm,平均胸径为4.720cm,平均单株生物量为5.059 kg;玄武岩平均树高为511.570 cm,平均胸径为4.650 cm,平均单株生物量为4.848 kg,生长良好,以下依次是石英砂岩、变余砂岩、第四纪红色黏土和煤系硅质砂页岩,且后2类岩性差异较小。岩性对单株各器官生物量影响最大的是根,其次是去皮干,再次按由大到小的顺序依次是全株、叶、干皮和带皮枝。[结论]长石石英砂岩和玄武岩对杉木生长最有利。
[Objective] The research aimed to reveal the relationship between lithology soil and Chinese fir growth, and lay the foundation for the systematic cultivation of Chinese fir fast growing and high yield forest. [Method] With the method of experimental ecology, variance analysis was used to study the growth and biomass of 11-year-old Chinese fir on six types of lithology with different lithology. The above-ground biomass was determined by clear-cut test, that is, deforestation and individual determination of the fresh weight of the trunk (peeled), trunk (peeled), twigs (peeled) and leaves, In the middle and lower respectively, the samples of the skin, the branches, the branches and the leaves were taken, the moisture content was measured, and then converted to the respective dry weight, the total biomass of the above-ground part was obtained. The biomass of the underground part was the root organism Amount, the determination of the method using the whole plant digging method, take the average wood, medium and small roots of mixed samples to determine the moisture content, converted into dry weight. The determination of biomass moisture content are used drying method. [Result] Six kinds of soils with different lithology had different effects on the height, diameter growth and biomass of Chinese fir. The mean tree height of feldspar quartz sandstone was 523.270 cm and the average diameter at breast height was 4.720 cm. The mean single plant biomass Was 5.059 kg. The average height of basalt was 511.570 cm, the average diameter at breast height was 4.650 cm, and the average biomass per plant was 4.848 kg. The basalts grew well, followed by quartz sandstone, metamorphic sandstone, Quaternary red clay and coal- Sand shale, and the latter two types of lithology difference is small. The lithology had the most significant effect on the biomass of all organs of the plant, followed by the skinning and drying, followed by the order of the whole plant, leaf, dry skin and dermatophyte. [Conclusion] The feldspathic quartz sandstone and basalt are most beneficial to Chinese fir growth.