摘要
通过田间试验和采样分析,研究野菊不同生育期植株干物质和氮、磷、钾吸收量,探讨野菊干物质积累和氮、磷、钾吸收与分配特点。结果表明:(1)野菊干物质积累量随生育进程不断增加,整体呈“慢-快-慢”变化,至开花期,花干物质积累量增加17.78%,各部位干物质积累量占全株干物质总量比例为茎>叶>花>根;(2)野菊营养生长期氮和磷吸收速率较高,钾吸收速率较低,现蕾开花后氮和磷吸收放缓,钾吸收速率和积累速率不断升高;(3)野菊全生育期根、茎、叶中氮、磷、钾均先增加后降低,峰值集中在分枝末期和现蕾期(9~10月),而花/蕾中氮、磷、钾积累量不断增加。分枝期至现蕾期为野菊植株生长发育关键时期,期间需注意水肥调控,以促进植株顶端现蕾与干物质积累。
Through field experiments and sampling analysis,the dry matter accumulation and nitrogen,phosphorus,and potassium uptake of different growth stages of wild chrysanthemum indicum plants were studied to explore the characteristics of dry matter accumulation and nitrogen,phosphorus,potassium uptake and distribution in wild C.indicum.The results showed that:(1)The dry matter accumulation of C.indicum increased with the growth process,and showed a trend of"slow-fast-slow".At the flowering stage,the dry matter accumulation of flowers increased by17.78%.The proportion of dry matter accumulation of each part in the total dry matter of the whole plant was stem>leaf>flower>root.(2)In the vegetative growth stage,the absorption rate of N and P was higher,but the absorption rate of K was lower.After flowering,the absorption rate of N and P slowed down,and the absorption rate and accumulation rate of K increased.(3)In the whole growth period,the accumulation rule of N,P and K in the vegetative parts(roots,stems and leaves)of C.indicum was the same,which increased first and then decreased.The peak appeared at the end of branching period and budding period(from September to October).The accumulation of N,P and K in flower/bud increased continuously.The period from branching to budding is the key period for the growth and development of C.indicum,and water and fertilizer management should be emphasized during this period to promote bud formation at the top of the plant and dry matter accumulation.
作者
魏民
韩正洲
郭玉海
WEI Min;HAN Zhengzhou;GUO Yuhai(College of Agronomy and Biotechnology,China Agricultural University,Beijing 100193;China Resources Sanjiu Medical&Pharmaceutical Co.,Ltd.,Shenzhen 518110,China)
出处
《东北农业科学》
2023年第4期39-43,共5页
Journal of Northeast Agricultural Sciences
基金
深圳市龙华区科技创新专项资金项目(708027617005)。
关键词
野菊
干物质
氮
磷
钾
Chrysanthemum indicum
Dry matter
Nitrogen
Phosphorus
Kalium
