蟋蟀草发生对温度、水分及土壤深度的反应

Emergence of Goosegrass Wiregrass Response to Temperature, Water and Depth in Soil.

蟋蟀草室内出土的极限温度最低为 5℃ ,最高为 4 0℃ ;出土最快的温度是 4 0℃ ,适宜温度是 2 0～ 35℃ ;出土的水分极限点是 2 0 % ,适宜水分是 80 % ,出土最快的水分含量是 80 %。在 5～ 50℃温度段内 ,相邻温度出土率显著变化的段是 2 0～ 2 5℃和 35～ 4 0℃ ;在 2 0 %～ 10 0 %含水量段内 ,相邻水分出土率显著变化段是 4 0 %～ 6 0 %。比较适宜的交替温度是 :水分为 6 0 %～ 10 0 %条件下的 2 5/ 35℃。温度 (5～ 50℃ )和水分 (0～ 10 0 % )在对蟋蟀草出土的作用中 ,两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。

The results of the study conducted in greenhouse in weed science section of China Agric. Univ. from 1955 to 1997 showed that the most suitable scope of temperature, amount of water in soil, depth in soil separately are 25～35℃, 60%～100%, 0～2cm for Goosegrass Wiregrass ( Eleusine indica (L.) Gaertn), the capital point of these environment factors are 5℃ and 45℃ in temp., 20% in water for Goosegrass Wiregrass, there are an apparently increasing of both rate and speed of emergence at the point of 20～25℃, 40%～60%. There exist a mutual support to Goosegrass Wiregrass between temperature and water.