Chen Yu-hang, Tian Han-qing, Guo Qiao-sheng, Deng Qiao-hua, Guo Jian-ying, Guan Cheng-zhong
Institute of Chinese Medicinal Materials, Nanjing Agricultural University, Nanjing 210095, China.
Zhongguo Zhong Yao Za Zhi. 2008 Nov;33(22):2599-602.
To study the effects of various planting densities on dynamic growth and root yield of Isatis indigotica.
The planting samples were collected to measure the growth period of each organ.
Under different planting densities, both main root length and breadth exhibited a trend of "fast-slow" by stages. However, the number of individual plant leaves were showed a trend of "slow-fast" on growth period. Meanwhile, the leaf length and breadth were exhibited a trend of "increase-decrease". The increase of dry leaf, dry root and whole plant dry matter was faster during the period of 65-76 days after seeding. The differences of root and leaf yields under various densities were significant. Planting densities has a great effect on yield of root. It must be shown that there was a positive development between the individual plant and colony. According to the dry matter of root and leaf, treatment B (i.e., 7 cm x 25 cm) was good choice.
研究不同种植密度对菘蓝动态生长及根产量的影响。
采集种植样本以测定各器官的生长周期。
在不同种植密度下，主根长度和宽度均呈现阶段性“快-慢”趋势。然而，单株叶片数量在生长周期上呈现“慢-快”趋势。同时，叶片长度和宽度呈现“增加-减少”趋势。播种后65-76天期间，干叶、干根和全株干物质的增加速度较快。不同密度下根和叶产量的差异显著。种植密度对根产量有很大影响。必须表明单株与群体之间存在正向发展关系。根据根和叶的干物质含量，处理B（即7厘米×25厘米）是较好的选择。
