苋菜、马唐出土对温度、水分的反应

The Response of Emergence of Common Crabgrass and Redroot Amaranth to the Temperature and Soil Moisture

本研究于１９９５～１９９７ 年在中国农业大学杂草研究室完成。研究结果表明：马唐（Ｄｉｇｉｔａｒｉａｓａｎｇｕｉｎａｌｉｓ）、苋菜（Ａｍ ａｒａｎｔｈｕｓｒｅｔｒｏｆｌｅｘｕｓ）室内出土的温度极限点：最低温度５℃，最高４０℃，适宜温度是３０～３５℃。５～５０℃温度段内，在相邻温度间杂草出土率显著变化的段是２０～２５℃和３５～４０℃，出土最快的温度是４０℃；这两种杂草出土的水分极限点是２０％ ，适宜水分是８０％ ，２０％ ～１００％ 含水量段内，在相邻的水分含量间杂草出土率显著变化段是４０％ ～６０％ ，出土最快的水分含量是１００％ 。温度和水分在对苋菜和马唐出土的作用中，二者之间存在一定程度的互补作用。

A Study of response of emergence of common crabgrass and redroot amaranth to the temperature and soil moisture was conducted in the greenhouse of weed research laboratory in Chin Agricultural University from 1995 to 1997. The results indicated that the suitable range of temperature, soil moisture and soil depth of emergence of common crabgrass and redroot amaranth are 25-35℃, 80%-100%, 0-2 cm, respectively. The other relevant indicators are reported as well.