牛膝在不同种植密度下的生长动态规律

Study on the dynamic growth rhythm of Achyranthes bidentata under different densities

目的:研究不同种植密度下牛膝生长动态,为牛膝的栽培生产提供理论依据。方法:田间随机区组试验定期定点采集牛膝样品,测定各器官生长量。结果:不同种植密度下,牛膝各器官生长动态相似。主根根长生长呈现“慢-快-慢”趋势;根干重在收获前30—40 d增长最快。全株干物质积累速率在分枝期后期最快。不同种植密度下牛膝根产量差异显著。结论:牛膝栽培生产中,应根据牛膝各器官的生长动态合理密植,促进牛膝主根根长增加和干物质积累,以达到高产、优质的目的。

Objective: The experiment was conducted to study the dynamic growth rhythm of Achyranthes bidentata under different densities. Method: The plant samples were collected to measure the growth rate of each organ. Result: Under different densities, the growing dynamic rhythm of A. bidentatawere similar. The growth of main root exhibited a trend of 'slow-fast-slow by stages. The increase of dry root weight was fastest during the period of 30-40 days before harvest. The dry-matter increasing rate of whole plant was fastest in the later period of branching stage. The differences of root yields among the plants growing under different densities were significant. Conclusion: For high yield and good quality, the density of planting of A. bidentata should be considered.