摘要
本文是根据安徽省舒城县龙河口地区水竹择伐人工异龄林内15个土壤剖面39个土样分析资料和1985—1987年160块次标准地的竹笋观测数据,进行数量化分析和回归计算,拟合出40个回归方程,研究水竹林土壤条件和倒笋间关系。研究表明:1)水竹林倒笋严重程度的顺序按土壤质地为:粘壤土>砂土>砂质粘土>砂壤土>壤土,按土壤厚度为:厚土层(≥50厘米)或薄土层(≤30厘米)高于中土层(30—50厘米);②土壤含水率高,倒笋严重,毛管孔隙度为35—40％,总孔隙度为50％,倒笋少;③土壤含氮量为1.90—1.95ton/mu,含磷量为0.50—0.75 ton/mu,倒笋少,阳离子代换量与倒笋呈负相关,与钾含量相关不显著;④倒笋与氮、磷、钾三元素含量之和呈正相关;⑤氮、磷、钾、含水量、阳离子代换量、孔隙度六元素与倒笋率关系分别年度拟合出回归方程。
Based on the analysis of 39 soil samples derived from 15 soil profiles and the field observation on shoot lodging status happened in 160 subplots during 1985—1987 in the uneven aged selection felling stand of Ph. heteroclada in Longhe, Shucheng County, Anhui Province, the relationship between shoot lodging and soil site quality such as main physical properties, chemical compositions etc. is studied, meanwhile, 40 regression equations are established by using the quantifid analysis and regression calculation. It is shown: 1. The effect from soil texure and thickness on shoot lodging is as follows: clay loam>sandy soil>sandy loam>loam, and thin (≤30 cm) or thick soil (≥50 cm)>medium one (30—50 cm). 2. High moisture content of soil results in serious shoot lodging, while total porosity at 50% and capillary porosity at 35—40., it occures slightly. 3. When nitrogen content is the range of 1.90—1.95 (ton/mu) (medium) and phosphorus content is the range of 0.50—0.75 (ton/mu), the shoot lodging occurs less, it is negatively correlated to the range of cation exchange capacity, but not significantly done to potassium. 4. The sum of contents of nitrogen, phosphorus and potassium is positively correlated to the lodging shoot. A multiple regression equation of lodging shoot to 6 factors is established for the every year.
出处
《竹子研究汇刊》
北大核心
1991年第4期33-46,共14页
Journal of Bamboo Research
关键词
水竹
倒笋率
立地质量
土壤
Phyllostachys heteroclada
Physical property and chemical composition of soil
Shoot lodging
Site quality
