摘要
采用盆栽和大田相结合的办法,研究柴胡的氮磷钾吸收特性。结果表明,在大田条件下,柴胡对氮、磷、钾元素的需求量顺序为钾>氮>磷,一年生柴胡每生产100kg干根,需吸收N11.77kg、P2O52.43kg、K2O14.07kg;二年生柴胡每生产100kg干根,需吸收N12.11kg、P2O52.74kg、K2O18.39kg。一年生和两年生柴胡吸收的N∶P2O5∶K2O分别为4.89∶1∶5.85和4.31∶1∶6.55。第一年柴胡吸收的氮、磷、钾总量较少,但地上地下部的相对含量都较高,对养分需求较迫切,而第二年返青至拔节末期为植株氮、磷、钾素积累的高峰期。柴胡各生育期体内氮、磷、钾比例差异较大。
It was studied that the characteristics of Bupleurum chinense DC. in nutrition uptake based on potted and field experi- ment to provide a properly fertilizer application measure. The result showed that the absorption amounts of N, P and K were in the order of K 〉 N 〉 P under field condition. For one-year-old B. chinesnse DC. , the average N, P2O5 and K2O absorption per 100kg dry matter of root were 11.77kg, 2.43kg, 14.07 kg respectively; for two-year-old, the average N, P2O5 and K2O absorption amount per 100kg dry matter of root were 12. 11kg,2.74kg,18.39 kg resoectively. The total absorption amount of N.,P2O5 and K2O were lower in thefirst year, while the percentage of content was higher, that was to say, the demand for N, P and K was urgent in the first year. The accumulation peak of N, P2O5 and K2O occurred regreening to later elongation stage in the second year. The ratio of N, P and K were differential in different growth stages.
出处
《中药材》
CAS
CSCD
北大核心
2006年第6期525-528,共4页
Journal of Chinese Medicinal Materials
基金
陕西省十五科技攻关项目(2001KG01G1503)
关键词
柴胡
氮磷钾
养分吸收
Bupleurum chinense
N、P、 K
Nutrition uptake
