论文部分内容阅读
休眠是杂草种子萌发的内在因素,研究杂草发生,首先要研究种子的休眠,通过26种主要农田杂草种子休眠萌发的试验,提出了以碎米荠为代表的越夏休眠;以稗草、藜为代表的越冬休眠;以看麦娘为代表的越夏、越冬休眠;以马唐、绿狗尾为代表的越冬、越夏休眠。同时还研究了环境条件对休眠萌发的影响。猪殃殃等早生杂草在含水量15%左右土壤的旱田内,易渡过休眠,而在浸水情况下难于渡过休眠,反之稗草、硬草等湿(水)生杂草在浸水的情况下,易解除休眠。看麦娘、稗草、异型莎草在20～30℃时易解除休眠,唯独小藜是在低温下解除休眠。
Hibernation is the internal factor of weed seed germination. To study the occurrence of weeds, we first study the dormancy of the seed. Through the dormancy and germination test of 26 main weed seeds, we put forward the summer dormancy, Grass, quinoa as the representative of the winter dormancy; to see Ophiopogon represented by the summer, winter dormancy; to crabgrass, green dog tail as the representative of the winter, the summer dormancy. The effects of environmental conditions on dormancy and germination were also studied. Early weeds, such as Galium aparine, are easily dormant in upland fields with soil moisture content of about 15%, while they are difficult to survive in flooding conditions. In contrast, wet weeds such as barnyardgrass and hard grass are inundated Case, easy to lift dormancy. See Aman, barnyard grass, Shaped sedative easy to lift the dormancy at 20 ~ 30 ℃, only small quinoa is to lift the dormancy at low temperatures.