摘要
4月5日至7月24日,每早播10天提早出苗6～10天,每增加10℃积温,约增产1％。早播种,甜菜能较早达到LAI3.0,生长中心提早转至根部,延长块根增长期。充分形成的同化器官,能充分利用7～8月份优越的气象条件,生产大量光合产物,为其高产创造物质基础;晚播LAI高峰期后移,生长中心转移晚,光合产物以较大份额用于地上部生长,向根部分配率低,导致低产低糖。块根产量与甜菜生育日数呈正相关,r=0.997。4月5日至15日,每早播10天增产8～11％,相邻播期产量差异均达到1％显著水平。
The thesis is about the physiological function of achieving sugar beet yield with defferent sowing time. From April 5 to July 24, early sowing in every 10 days, the seeds emerged early 6 to 10 days. Adding every 10℃ accumulated temperature, the'yield of beet increased 1％. From A April 5 to June 24, the content sugar rate of the root showed a increasing tread with the sowing time delay, this wasn't the same view before reports. Early sowing, as sugar beet can reach LAI 3.0 early, the growth center turned to underground part early, and lenthened root growing time. Early sowing, producing fully assimilation organ, making good use of the natural condition of July to Aug., combining a lot of photosynthate, beet established a material base to achieve high yield. Late sowing, LAI peak value delay, the growth center turned to root late, a large part of photosynthate used as terrestrial stem and leaf, so a small part distributed to root, leading to lower yield and lower sugar content.
出处
《中国甜菜糖业》
1992年第3期7-15,共9页
China Beet & Sugar
关键词
播期
积温
生长中心
块根产量
甜菜
Sowing time Accumulated temperature Growth center Root yield
