重庆市武隆区野生川续断动态调查研究

A developmental research on wild Dipsacus asper in Chongqing Wulong district

为了解重庆市武隆区野生川续断资源的分布及动态变化情况,采用样线+样地调查法,在武隆区川续断自然分布区选取9个样地进行连续12个月的实地调查。结果表明:川续断分布于林缘荒地或灌草丛,生长土壤以疏松的黄棕壤或红壤长势较好,岩性土壤或利水条件差则长势不好或容易烂根;株高在6-7月,地上鲜重在7-8月生长曲线均出现一个拐点,可能与开花期消耗大量营养,导致营养生长受到限制有关系;武隆区川续断分布区域最高温度不超过30℃,最低温在0℃左右,降雨量1 241~1 392 mm,其生长环境为冬无严寒、夏无酷暑、降雨充沛;川续断主要生长阶段7-10月的根折干率范围情况:巷口区域0. 162 5~0. 239 7,白马山区域0. 154 9~0. 223 6,仙女山区域0. 143 7~0. 203 3,其主要生长阶段内的营养生长与干物质积累同步,且干物质积累速度大于营养生长积累速度;对地上部分各个指标与根鲜重进行相关性分析,指示地上鲜重与根鲜重相关性最好。

In order to study the distribution and dynamics growth of wild Dipsacus asper resources in the Wulong district of Chongqing,9 sample plots were selected for 12 consecutive months in the natural distribution area of the D. asper in Wulong district by using the sample line + plot survey method to conduct a field survey. The results showed that D. asper was distributed in forest edge wasteland or shrub-grassland,and growbetter with loose yellow-brownsoil or red soil,and poor with lithologic soil or impounded surface water. The growth curve of the plant height from June to July and the ground fresh weight from July to August showed a turning point,it might consume large amounts of nutrients during its flowering period,resulting in the restriction of vegetative growth. The highest temperature in the distribution area of D. asperoides in Wulong district is less than 30 ℃,the minimum temperature is about 0 ℃,and the rainfall is 1 241-1 392 mm. Its growth environment is no severecold in winter,no heat in summer,and abundant rainfall. The main growth stage of D. asper is from July to October,and the range of root dry rate was 0. 162 5-0. 239 7 in Xiangkou,0. 154 9-0. 223 6 in Baima Mountain,and 0. 143 7-0. 203 3 Xiannv Mountain. The vegetative growth and dry matter accumulation synchronized in the main growth stage,and the accumulation rate of dry matter was faster than that of vegetative growth. The correlation analysis between indicators and root fresh weight showed that the fresh weight of the aerial part and root fresh weight had the best correlation.