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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，温度对水分的互补作用尤为明显
This study was performed in Weed Research Lab of China Agricultural University from 1995 to 1997. The results showed that: the temperature of the excavated point in Digitariasanguinalis and Amaranthus retroflexus was the lowest temperature of 5 ℃, the highest of 40 ℃ and the optimum temperature of 30 ~ 35 ℃. In the temperature range of 5 ~ 50 ℃, the section with significant changes of weed excavalence at adjacent temperature was 20 ~ 25 ℃ and 35 ~ 40 ℃, the fastest temperature was 40 ℃; the moisture limit of the two weeds Point is 20%, suitable moisture is 80%, 20% ~ 100% moisture content in the adjacent moisture content of weeds significantly change the rate of change is 40% ~ 60%, the fastest moisture content unearthed is 100 %. The effects of temperature and water on the excavated amaranth and crabgrass have a certain degree of complementarity between each other, and the complementary effect of temperature on water is especially obvious