三年生当归不同节位花穗籽粒灌浆特性研究  

Studies on Grain Filling Characteristics in Different Spikes of Triennium-growth Angelica sinensis

作　　者：赵洋[1] 陈垣[1] 郭凤霞[2] 黎天 王俊英[1] 屠彩芸[1] 

机构地区：[1]甘肃农业大学农学院,甘肃兰州730070 [2]甘肃农业大学生命科学技术学院,甘肃兰州730070 [3]甘南州农技站,甘肃甘南州747000

出　　处：《中药材》2009年第6期837-840,共4页Journal of Chinese Medicinal Materials

基　　金：国家科技支撑项目(2007BAI37B02);甘肃省科技攻关项目(2GS042-A43-013-06);甘肃省重大专项(0702NKDA049)

摘　　要：目的:研究当归籽粒灌浆特性,为确定种子采收期提供理论依据。方法:在三年生当归采种田,选择株型、花期一致的植株40株挂牌标记,从开花后第8d开始每天测定不同节位花穗籽粒千粒鲜、干重、百粒体积及长宽厚度,最后用Logistic方程拟合。结果:籽粒含水率下降最快的时期均为灌浆高峰期,但灌浆强弱不同,头穗花籽粒灌浆速度、强度、干物质积累量始终较二穗花籽粒强,灌浆峰期提早。头穗花为籽粒灌浆强势花穗,适宜采收期为头穗花开花后13d,其籽粒干物质为其最大干物质重的86.2%左右,含水率为68.8%左右;二穗花籽粒适宜采收期为头穗花开花后14d,其籽粒干物质为其最大干物质重的82.0%左右,含水率为72.2%左右。结论:不同花穗籽粒灌浆持续期相同,灌浆过程均符合Logistic方程,考虑全株一次性采收种子,开花前应剪除头穗和下部弱枝花穗。Objective：To study grain filling characteristics of triennium-growth Angelica sinensis in order to provide theoretic evidence for determining the adapted harvesting time for seeds. Methods： 1000-grain fresh and dry weight, 100-grain volume, grain length, width and thickness in different spikes which were measured every day from the 8th day afte the head spike bloomed and finally estimated by Logistic equation. Results： It was the peak filling time when the grain water decreased most rapidly. The grain filling speed, intensity, dry matter accumulation in head spike were all higher than those in the second spike, which resulted in early peak. The seeds in the head spike had advantages in grain filling and their adapted harvesting time should be the 13th day after blooming, when there were 86. 2 % of dry the maximum matter accumulation and 68.8% as water content in seeds. However, the adapted harvesting time for the seeds in the second spike should be the 14th day after the first spike bloomed, when there were 82.0 % of the max- imum dry matter accumulation and 72.2% as water content. Conclusion：According with the Logistic equation, the grains filling in different spikes had the same duration but differed in the intersity. We should harvest the whole plant seeds at a time, and away the head and below weak spikes before blooming.

关 键 词：当归 花穗 籽粒灌浆 LOGISTIC方程 

分 类 号：R282.4[医药卫生—中药学]